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Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #693946
05/04/17 9:42 am
05/04/17 9:42 am
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
Hi Ed.
you said

" I am aware that if a bike runs better if you back off the throttle, the main jet is probably rich",

this is not right,If the bike runs better when the throttle is backed off , the MJ is too LEAN.

In an ideal world carb settings would be a perfect 12:1 across the range, a trip to a dyno and a few adjustments , hey presto carbs done.


In my world the dyno is a days journey away and the operators are used to FI or diaphragm carbs, so the the throttle gets banged WFO for the run, not much help with old Amals.

i agree , admitting a crude strangler at full throttle is a pretty coarse test, however I can only use whats available ,so thats all i can do.
My new settings were arrived at by a few iterations, not being keen on running a fresh built motor at full throttle to get the MJ first , I have needed more trials ( and errors!) than possibly needed.

First off it was obvious on the first run the slide was too weak, spitting immediately off idle, applying the choke fixed it, so i went one slide 1/2 number richer from 3.5 to 3. Sorted.

next 1/2 throttle runs, applying choke killed any pull, changed tone to lower, so too rich, down one NJ size, more better but still applying choke for test not better.
Next a weaker needle, instant improvement on pull, more choke shows still not too lean. Settle for needle in weakest position after road tests. This changed after getting the MJ size right.

Next MJ , 190s still too rich, for this I prefer not to use the choke but look for pick up when throttle is partially closed from WFO.Although the choke can be played with for science sake.
Arrive at 160 MJs using this test. Now 1/2 to 3/4 is a bit lean, raise needle one notch ( again choke tests gave a slight improvement in this range), presumably the over rich MJ were influencing the 1/2 - 3/4 range , with the correct MJs fitted this had gone too lean, Thats the current set up.
Without the choke tests the 1/2 throttle range would have been more difficult to get right.
This has all been a bit " seat of the pants" , luckily Amals have limited variables so the number of possible combinations gets narrowed down fast, unlike Mikunis which have a few more needle options to keep you busy.
Yes choke tests are crude, but short of an onboard air / fuel mix analyser its all a poorboy can do.
i tried plug chops, modern fuel and a miserly attitude to sawing up plugs meant I could tell very little from them.
last time I pulled the plugs they were not sooty and not overly white with the earth strap looking healthy , i cant be far off.

Disclaimer, these carb settings work with my bike, the ports work very differently from the stock holes, I have stock filters, cams and pipes, but bigger valves and pistons, do not be tempted to try these settings with stock ports, your stock A65 will run way too lean.





Last edited by gavin eisler; 05/04/17 9:52 am.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
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Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #694181
05/06/17 8:29 pm
05/06/17 8:29 pm
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
Its time to call an end to this thread , signing off with a 3 day adventure, perfect weather , great company and good whisky.

The West coast of Scotland is heaven on earth at this time of year.

Heres the bike in Ullapool , about 160 miles north of home, Deuchars finest ale in the pannier back pockets at the chip shop.
Soup and a haddock supper to refuel, The eagle eyed will note the lack of pillion footrest, missed that in the fasteners check and paid the price, the silencer clamp held out to the end , whew. The panniers are a bicycle set, but they did the job with some elastic rope for added security.

[Linked Image]

Too cold for ice cream at ten past eight.
[Linked Image]
Ullapool town clock.
[Linked Image]

berthing companions in Grants shed in Nedd, T150 with Hyde kit and all the goodies, with a Self abuser behind it.
[Linked Image]

Unpacking 195 miles later, destination acheived.
[Linked Image]

Quineag seen form the shed in Nedd. my breakfast view.
[Linked Image]

The Seas Rich Harvest, old capstan at Tarbert , Handa ferry terminal.
[Linked Image]

This man and this boat saved my sons life ,
[Linked Image]
one reason for the journey was to thank him, 3 years ago my son fell off a cliff on Handa Island, 45 foot drop onto boulders below the tide line. Roger was called out by the coastguard because he was closest and knew the waters, they heard Robbies shouts, got the boat close and raised him above the incoming tide, the life boat couldnt get in , they stabilised him before the chopper picked up and flew him to Stornaway on the isle of Lewis.
Where the excellent folks in the Hospital put together a shattered femur and stabilised broken Vertebrae, he made a full recovery.


View of Tarbert terminal and the waters to Handa. BSA showed a clean pair of heels to the Busa on the mostly 1,st and 2nd gear tracks.
[Linked Image]

Filling with the most expensive fuel on Mainland Scotland , in Scourie.£ 12. 70 for 9.5 litres, almost £6 a gallon.
[Linked Image]

More Sutherland peaks from Kyleskue
[Linked Image]
The BSA hillwatching , Quinag, as I rode over at Sunset, this had lit up like an OTT photoshopped Ayers rock, couldnt stop at the time though, this doesnt do it justice.
[Linked Image]
Me, bike , loch , hills looking North.
[Linked Image]
Good company.
[Linked Image]
[Linked Image]



Last edited by gavin eisler; 05/06/17 8:38 pm.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #694183
05/06/17 8:41 pm
05/06/17 8:41 pm
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
The road into Nedd is possibly the most challenging drive I have ever encountered, its fun, but you wont get out of 2nd more than once, and 1st is essential for the one in four hairpins, anything bigger than a van gets stuck on this road, as well as the grades there are herds of red deer, and crazy local fishfarmers who know it too well.
[Linked Image]
one of the infinite number of corners, with the old CR 4 speed i would have killed the clutch, very grateful to the new 5 speed cluster, low speeds easy, overtake more than one car drop two gears and cheerio. Its brilliant.

it never stops raining here dont go.
[Linked Image]

The policemen are eating Ice cream, so did I , roasting, the cops were good crack, the BSA is the best ambassador you can get, everyone is your friend.
[Linked Image]

Ruins of the Beauly priory.
[Linked Image]
Cool tree.
[Linked Image]

An epic wee adventure, bike ran great, marked its spot from the crank breather, otherwise flawless, hitting nearly 70 mpgs, cruising 4- 5 k, and eating up the road. About 500 miles in 3 days amongst the most incredible scenery in the World on a bike that makes every one like you , what a blast, thanks for watching, goodnight.


Last edited by gavin eisler; 11/28/17 7:02 pm.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #700770
07/04/17 9:44 pm
07/04/17 9:44 pm
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
Well the pics have gone, Photo Bucket have blocked 3rd party Linka , I may edit the thread and repost it in aa trimmer version, a job for Winter.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #700842
07/05/17 1:44 pm
07/05/17 1:44 pm
Joined: Jul 2012
Posts: 341
Forfar, Scotland
J
JER.Hill Online content
BritBike Forum member
JER.Hill  Online Content
BritBike Forum member
J

Joined: Jul 2012
Posts: 341
Forfar, Scotland
Maybe is a good time for the site to look at a different and simpler way of loading photo's onto the site!

Just saying

John

Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: JER.Hill] #700850
07/05/17 4:28 pm
07/05/17 4:28 pm
Joined: Sep 2013
Posts: 1,733
Pacific northwest
Q
quinten Offline
BritBike Forum member
quinten  Offline
BritBike Forum member
Q

Joined: Sep 2013
Posts: 1,733
Pacific northwest
Originally Posted by JER.Hill
Maybe is a good time for the site to look at a different and simpler way of loading photo's onto the site!

Just saying

John


This site already offers photo upload-storage directly from your device , , with premium membership .
Free membership allows us to get on board , premium membership offers a bigger seat .

... Snipped from a similar thread , just a few days ago...
Originally Posted by Morgan aka Admin
..., who is blackmailing you? It's not me/britbike. I have nothing to do with photobu...
This forum has been online 21 years and would have been long gone If I had not found sponsor help in the past.
See this page scroll all the way to the bottom.
http://www.britbike.com/sponsor/

The first years was not cheap I payed the same amount that you would buy a decent running BSA A65. Every year.. Familiy was not happy to see holiday money spent on a website.
Then members and companies started to contribute and with out that help it wouild have eventually been closed.

Luckily that did not happen. Still there was no way to upload photos but that changed along the way.
However there was still an issue that the database and storage was limited.

Still I wanted to offer image upload service and a new member account was created the Premium member who can upload images and documents.
You see over the years spammers, scammer and other non wanted creatures will take advantages andpost whatever they like and it will be annoying and we just don't want to deal with that.

The premium members group that pays about a dollar per month is perfect you see a scammer will not likely apply for membership and the pay the 12.95 dollars because it will
reveal their identity.

BTW nothing is free.. you may think that this website is free but as I mentioned it is the sponsors that pay for it. As a "free" member you don't get all the benefitsbut quit a few.
Cheers
Morgan your admin.



Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #700915
07/06/17 10:20 am
07/06/17 10:20 am
Joined: Jul 2012
Posts: 341
Forfar, Scotland
J
JER.Hill Online content
BritBike Forum member
JER.Hill  Online Content
BritBike Forum member
J

Joined: Jul 2012
Posts: 341
Forfar, Scotland
Hi Quinten

I'm not really into the computer world and in no way was taking a dig at all the good work done by Morgan with the site.

regards

John

Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #700946
07/06/17 6:44 pm
07/06/17 6:44 pm
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
testing, seems to work. trying the Attachment Manager, not sure how to place with regards to text.
Have grabbed this pic from my PC, but the edit box does not show where it will end up.
I am struggling to find some of the early rebuild pics, they are in the PC somewhere though, I will start editing from the top when I find them.

Attached Files 1971 Devimead siamese pipe circa 1983 001.jpg
Last edited by gavin eisler; 07/06/17 6:50 pm. Reason: trying out pics

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #701076
07/08/17 2:03 am
07/08/17 2:03 am
Joined: Apr 2007
Posts: 819
Brisbane, Australia
BrizzoBrit Offline

Life member
BrizzoBrit  Offline

Life member

Joined: Apr 2007
Posts: 819
Brisbane, Australia
Hi Gavin,

You cant position images with AM, they all line up at the bottom. You just have to add images to AM in the order you want them to show up. To view in the post, click on the images to get a 'full size' view. I find 1000 pixels on long axis seems to get the file size close to the limit. As noted by someone on the pukebucket thread, it's worth adding a caption. I haven't sorted that yet. Also, the preview post function doesn't show the images so if you get it wrong you need to edit the post.

Sorry you lost all your images. Lots of valuable information now MIA for lots of threads. GRRRRRR!

Keep smiling
Ray


BSA 1969 A65F
BSA 1966 A65H
Triumph 1968 T120
Kawasaki A1R
& too many projects!
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #701209
07/09/17 2:28 pm
07/09/17 2:28 pm
Joined: Dec 2004
Posts: 9,550
Scotland
kommando Offline
BritBike Forum member
kommando  Offline
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Joined: Dec 2004
Posts: 9,550
Scotland
I suspect the Photobucket will go either of 2 ways.

1. They see sense and back off and restore previous function (it's not even as if their definition of 3rd party agrees with anyone elses)

2. They go bust and disappear.

So you can wait or not but either way its best to get all the pics before they disappear.

You can still get to all your photos in photobucket, you can download them by downloading each album which you then get as a zip, I had one zip with 240 images inside.

Sign in to photobucket, go into library, select an album and look at the bottom right and under 'Action' there is a 'download album' button. Go into each of the library's to get the download, each one is a pain with all the clicking and waiting but its better than searching 2 pc's and 5 memory cards in my case.

Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: BrizzoBrit] #701470
07/11/17 6:12 pm
07/11/17 6:12 pm
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
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Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
Thanks Ray, great info.
And John , thanks much appreciated.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels for 750 OIF 1971 [Re: gavin eisler] #702726
07/25/17 10:28 am
07/25/17 10:28 am
Joined: May 2013
Posts: 5,004
Rotherham - S. Yorkshire
Allan Gill Offline

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Allan Gill  Offline

BritBike Forum member

Joined: May 2013
Posts: 5,004
Rotherham - S. Yorkshire
I thought I'd add this here as you have carried out this modification with some of my recommendation.

After running the same cylinder head on my bike for the last 3 years, port modified with JB weld, I did a head swap over the weekend because I felt the guide was failing. In fact one of the cylinder stud holes had seen better days and it was actually pulling oil in. Anyway long story cut short in the last 12 months fuel has started to eat away at the JB weld leaving very little left. Infact I think it's more within the last 3 months as performance characteristics has changed.

The good news is the valves and seats are perfect still, some carbon on pistons but I think this was from the oil and not the epoxy. This softened quickly by dropping the pistons in the bore and filling them with toluene to soak. This also checked the ring seal too which was flawless as Toluene will seep past most things.


beerchug
Re: alloy barrels for 750 OIF 1971 [Re: gavin eisler] #702828
07/26/17 10:22 am
07/26/17 10:22 am
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
Thanks for the heads up Allan, I did use JB weld, Will pull the carbs and check.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels for 750 OIF 1971 [Re: gavin eisler] #702962
07/27/17 7:19 am
07/27/17 7:19 am
Joined: May 2013
Posts: 5,004
Rotherham - S. Yorkshire
Allan Gill Offline

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Allan Gill  Offline

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Joined: May 2013
Posts: 5,004
Rotherham - S. Yorkshire
You might be fine for. Few years Gavin, this head of mine was done in 2013, and not that long ago was checked - last year. And was fine.


beerchug
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #711237
10/11/17 8:34 pm
10/11/17 8:34 pm
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
An end of season update. nearly 7K miles. All good, no major issues, have replaced the Headlamp lense reflector with a Wipac QH unit, huge improvement.
Pics show new front mudguard/ fork brace made from 2mm SS, lowers the mudguard a whole inch.

Attached Files IMG_0402.JPGIMG_0397.JPGIMG_0398.JPGIMG_0403.JPG
Last edited by gavin eisler; 10/11/17 8:34 pm.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #724782
02/08/18 6:29 pm
02/08/18 6:29 pm
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
Thread resurrection time.
Winter is well on, the beesa is ben the hoose, work has expanded into time and its taken me weeks to do what should have taken hours.
I have finally got fed up with heaving the bike onto the centre stand and the welders are primed for side stand bracket fitting.
re piccing the thread is a major headache, my PC now runs on Linux, but i can only access the pics on file using windows, its like herding cats and very slow.
I have accumulated a few odds and ends to keep entropy at bay. While the motor is out for the frame /stand bracket welding I have a couple of wee jobs to do.
Fit a ball bearing tipped cam plunger courtesy of David Drew, fit a reed valve case breather, plug the timed breather, and see why it still wet sumps.
For the record ,when I drained the sump after sitting for 3 months there was a whole litre in it, more had leaked in and dribbled out the cam breather, probably another pint or so. I suspect the oil pump spindle O ring is the culprit, this is getting renewed , as is the NRV spring which is probably still the original item from 1971.
The timing plug is 1/2 " UNC, I have a suitable stud part machined which will be drilled down the centre as the take off point for the reed valve set up. The reed valve is off some sort of wee yamaha and is quite neat. Watched a bunch of youtube things on crank case breathers and read up stuff on Nortons, Kommando has been v helpful and steered me towards using the timing plug as the tapping point, closest to source of pressure seems to be best for these things
Also purchased two 32 mm flat slide carbs( suspiciously cheap!), will trial these if I can make them fit in with the air box rubbers.If these work I can lose the choke lever and cables , since the new carbs have choke plungers on their bodies, less clutter on the bars
Reviewing the last year , apart from self inflicted suspension damage when the panniers got intimate with the back wheel, breaking a spoke and bending the RHS shock the bike was pretty much trouble free. Cheap to run at 60 ish mpgs, and a lot of fun to ride.
Things that still need attention.
The seat, using the narrow nosed seat there is a 1/4 " miss alignment at the front , considering moving the front hinge back to the Triumph position to allow this to square up.The seat catch is a joke, once the rubbers settle it plain doesnt work, no big deal, but annoying all the same.
Fuel lines, with the 45degree banjos fitted it was impossible to prevent the balance line between carbs from contacting the air box, in case the flat slides are no use, I have fitted 180 banjos which solve the airbox interface, but will mean the fuel lines from the taps run outboard in a big curve. The existing lines show cracking on the pipes exteriors and are due for renewal any way.
Good stuff.
Shocks, after damaging the Konis , i fitted new Hagons to keep the show on the road, noted that the Konis are at least an inch longer, giving more ground clearance, but also making the quite high saddle even higher.A very awkward side effect of the longer Konis is that access to the rear axle when adjustiong the chain is a lot trickier.
Mudguard brace, aesthetically pleasing, no big gap any more , time will tell if it stops the stays from breaking, it does feel straighter under braking, so Yay,
Running two chains and using the old school boil in the tin lube, excellent, far less wear and a lot less splatter, heartily recommended. Swapping chains is a lot easier than re-tensioning , and cleaning off the bike is far more thorough, only tightened once in 4,000 miles.
Surprising stuff, the air filter wire mesh which supports the pleats is rusting! caught lots of flies though,.
Typical stuff, the exhaust headers were too easy to remove, and looking at the soot marks had not sealed perfectly, my fault , lack of prep, used wrong stuff , and redid it in a hurry, will make sure its all bright metal for the goo when re fitting. Contacted Raysons exhausts about having my set copied, they want the bike to get it correct, that can wait, but maybe one day, pretty spendy as well. If anyone knows of a supplier of balance pipe headers for a 71 A65 that actually fit I would like to know.


I got lucky with a NOS BSA fuel tank breadbox style from Autocycles, good price too, cheaper than the repops you see on E bay, it will need painting though, it looks identical to the trumpet tank which is fitted apart from the fuel tap locations which are about an inch further forward, this could be a good thing.
One of the past years highlights was visiting an old pal who has a stable of goldies, we swapped bikes, I got to ride a touring DB, he took the A65, quite a contrast!, the GS was fun in an old school sort of way, dont know if I could live with a TT carb though, and the suspension felt primitive compared to the OIF, two decades apart noticeably.
I had so much fun riding the Beesa last year that my Cagiva stayed in the shed on a SORN, will see what 2018 brings. The other highlight was simple paper work stuff, now MOT exempt and Road Tax exempt, not sure about skipping MOTs, I may still do this just for peace of mind.
Will update with a few pics


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #724794
02/08/18 7:44 pm
02/08/18 7:44 pm
Joined: Nov 2010
Posts: 3,118
Arlington, Massachusetts, USA
kurt fischer Offline

#irideslow
kurt fischer  Offline

#irideslow

Joined: Nov 2010
Posts: 3,118
Arlington, Massachusetts, USA
^^ Thanks, Gavin, terrific, I'm lucky to own a similar model, I learn what to do from your posts.

Please, more info on the David Drew cam plunger -- and how can I get one?


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #724803
02/08/18 9:09 pm
02/08/18 9:09 pm
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
Hi Kurt.
See here on eBay for the cam plunger
https://www.eBay.co.uk/itm/BSA-A50-65-Triumph-T120-T140-T150-4-5-speed-roller-ball-gearbox-plunger-57-3660/273019930543?hash=item3f914187af:g:~WoAAOSwTuJYnLqa

Alan posted a warning about the port filling disappearing, I have just shone a torch in my ports, there it was gone!, one tiny scrap still sticking to the steel insert, no sign of it at all on the alloy bit,... bugger!
I cant honestly say i noticed a huge step change in performance at any time, either it slowly melted away with the fuel or what , I dunno, the head will have to come off again if this is to be replaced, whatever goes back in it wont be JB weld, needs to be less solvent or more sticky, I had cleaned the ports scrupulously with acetone and roughed them up with a burr, so it wasnt lack of prep.
open to suggestions. Update, have just contacted the UK Belzona distributor, we used their molecular metal products for some amazing bodge repairs in the power station, hopefully they will have something to suit, wont be cheap though, I had a quick skek around their web site, interesting products, http://www.belzona.co.uk/en/products/1000/1111.aspx

Last edited by gavin eisler; 02/08/18 10:14 pm.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #724870
02/09/18 11:44 am
02/09/18 11:44 am
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
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Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
Had a chat with the belzona sales engineer, their max temp material is good to 150 C, its called 1511 HT and its £175 per kilo, oof!. however its probably the best stuff out there unless any one else knows different, i will wait a week or two before denting the wallet. In the case of the inlet port its probably the dual attack of heat cold. and solvent abuse that causes the epoxy to let go, I imagine the end nearest the inlet valve gets pretty hot, how hot though?, hard to measure. I have pointed a red light thermometer at the exhaust port fins and seen 230 C, after a thrash, but thats not whats happening inside the inlet bits.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #724876
02/09/18 1:35 pm
02/09/18 1:35 pm
Joined: May 2013
Posts: 5,004
Rotherham - S. Yorkshire
Allan Gill Offline

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Allan Gill  Offline

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Joined: May 2013
Posts: 5,004
Rotherham - S. Yorkshire
The problem with using aetone for cleaning of oils (and mainly fuel deposits) is it won't do a thorough job. The solvent using in gasoline (derv is different) is Toluene, however cleaning with toluene will remove all the fuel residue, acetone will remove the toluene residue. Heptane (as well as toluene) is good for removing oils (dont use near paint)

As for the JB weld being eaten away, its a strange one as I have been using it in my ports since 2012/2013 and its never been affected. Maybe further changes to gasoline has allowed the JB weld to be attacked by it confused

I am looking at doing my next set of ports differently, and that will be by sleeving the port with an aluminium tube, shaped before fitted and then welded into place...


beerchug
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #724883
02/09/18 3:14 pm
02/09/18 3:14 pm
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
Allan, what was it you were using when the port filler vanished? i thought it was JB weld.

Last edited by gavin eisler; 02/09/18 3:15 pm.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #724899
02/09/18 5:46 pm
02/09/18 5:46 pm
Joined: Dec 2004
Posts: 9,550
Scotland
kommando Offline
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kommando  Offline
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Joined: Dec 2004
Posts: 9,550
Scotland
As far as I am aware there is no ethanol free fuel in Scotland, even the premium grades, so unlike the rest of the UK where some premium grades are ethanol free (other than the SW which is also 100% ethanol) there is no way to run ethanol free fuel in Scotland. So maybe Alan is able to run ethanol free and the JB weld holds up better.

Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #724920
02/09/18 7:23 pm
02/09/18 7:23 pm
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
This episode brings to mind a saying one of my friends is keen to remind me of " Glue disnae F'n work", Cracked the egg open today, nothing weird in the rocker cover or primary case ( just the usual dark mung in the bottom of the primary, no shinies or rollers), no news is good news, although the exh tappet settings were not zero, might explain some of the tappet noise ( note, using steel pushrods in the alloy block, tappet settings are zero when cold), so at least the seats arent eroding, cam or follower wear presumably. Will put the numbers up later.
Cases parted easily with the Wellseal holding the gaskets to the removable parts and freeing easily on the greased motor side, pleased to note the inlets were still zero, was worried that all the hardening had gone from the rocker pads, obviously not yet .


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #724951
02/09/18 10:50 pm
02/09/18 10:50 pm
Joined: Jan 2014
Posts: 4,022
Aus
N
NickL Offline
BritBike Forum member
NickL  Offline
BritBike Forum member
N

Joined: Jan 2014
Posts: 4,022
Aus
Manley Magic Seal Epoxy (putty)

https://www.eBay.com.au/sch/i.html?..._nkw=manly+magic+seal+epoxy&_sacat=0

It's supposed to be for repairing inlet manifolds etc.
I think they do an exhaust version as well.

The reed valve didn't work for me but my motor breathes into the primary case so pulses were heavily damped. I just use
a 12mm bore plastic tube from the primary cover up over the rear guard, it's bone dry.
A 3/8 or 10mm allan bolt bis the thing to use to plug the existing breather, just run a tap up there and use some silicon on it.
Interested to find out how the plunger goes.


No-one expects the Spanish Inquisition................
Bring in the 'Comfy Chair'
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #724961
02/10/18 1:31 am
02/10/18 1:31 am
Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,113
argyll. scotland, uk
Cheers Nick , good tips, .


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
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