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Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #748011
09/05/18 6:41 pm
09/05/18 6:41 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
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argyll. scotland, uk
probably, i had set off for Oban, turned back at Connel when the clouds intensified. Times about right.


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] #748029
09/05/18 8:48 pm
09/05/18 8:48 pm
Joined: May 2006
Posts: 302
Scotland
Bry Offline

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Bry  Offline

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Scotland
Originally Posted by gavin eisler
probably, i had set off for Oban, turned back at Connel when the clouds intensified. Times about right.


Wise move, it was chucking it down by the time I got to Oban.


1946 Velocette MSS
1955 Triton
1959 Velocette Venom
1966 Triumph T120
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #748915
09/12/18 6:27 pm
09/12/18 6:27 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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argyll. scotland, uk
"Your real-world MPG average is 57.87, covering 186 miles using 3.21 gallons of fuel."

The number plate split in half, 2nd time its had to be welded up, it really needs rubber mounting,
Winter project along with new fork springs. Roads are grim at the moment, still a few campervans about, had a wee sideways bowel slackener caused by diesel spills. Bike is running V well.
There might be something in the dynamic balancing, havent had to replace any lamps for a few thousand miles, apart from the rear number plate , no vibration casualties. I know, I have just cursed myself, " cauld iron". or touch wood.
The 7 plate clutch is wonderful. Heartily recommended.The 5 speed box is such a good thing, , overtakes in 3rd are loads of fun, its a shame John couldnt get enough orders for a 2nd batch, oh well, I am happy to have got a set , pity for the rest of the world.


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] #749645
09/18/18 3:09 pm
09/18/18 3:09 pm
Joined: Sep 2018
Posts: 3
Mid west USA
G
George Henstorf Offline
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I have many serviceable conical hub spokes removed from my 71 T120RV I would be happy to move on for the cost of shipping. Removed with a quality spoke wrench but need cleaning. Nipples not damaged during removal.

Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #749891
09/20/18 6:18 pm
09/20/18 6:18 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
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argyll. scotland, uk
I have plenty spare spokes, thanks for the offer.

Pics of repaired number plate, new front brake cable , 4" shorter and neater run.

Attached Files IMG_0983.JPGIMG_0982.JPGIMG_0981.JPG

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] #750313
09/24/18 4:06 pm
09/24/18 4:06 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
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argyll. scotland, uk
"Your real-world MPG average is 57.96, covering 152 miles using 2.62 gallons of fuel." No 60 + mpgs since the fly-screen broke.

The new brake cable is better than the old one, more positive. 4" shorter without the big lazy bend going round the outside of the LHS fork tube.
Tyres are going off, wet roads, white lines or surface changes now have a noticeable "squirrelly" affect, front actually looks worn, both are still "legal" but will be getting replaced soon, around 3K miles on new rubber seems about the limit. Some of my favourite bends have shellgrip on them, I think thats what wearing the front , I doubt if its the brake. last oil change , nothing weird, very little ferrous on the sump magnet. Thinking of using that 20/50 V twin stuff folks here recommend, next change , still have some golden film Morris stuff left. Between 1,000 mile changes it needs about 1/2 a pint of top up.
I am developing a deep affection for the stock air box set up, its almost as if it was designed for the bike, who would have thought! , the carbs no longer droop on the rubbers from lack of support and they are now almost weather proof, water in the fuel is noticeably more absent. been out in some pish weather lately and this is a real bonus. Took a run with a friend in the wet / dark lately, very glad to have the Wipac Quadoptic front lamp, best bike front lamp Ive used. The electrics currently fitted, LED stop /tail, 60 /55 W front lamp, Boyer micro digital, 4 YO battery, Voltage indicator LED , 3 phase alternator ( about 18 years old), Podtronics reg/rec. pretty much flawless so far, if I have the 60W lit at the front I do notice the voltage indicator changing to the worrying red sub 1500 ish revs or idling, but never see noticable dimming. Riding with lights on all the time and coping , what more can a body ask for. At cruising speed 3k -4k the indicator shows healthy amber to green depending on revs with the main lit.


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] #751092
10/01/18 12:29 pm
10/01/18 12:29 pm
Joined: May 2013
Posts: 5,082
Rotherham - S. Yorkshire
Allan Gill Offline

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looks like your using Roadriders Gavin?

Strangely Im getting much higher milages, front and rear now around 5000, front looks like it will last for ever and rear isn't weaving yet but I keep thinking a tyre is looming... I'll see how far I can push is first though.


beerchug
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #751392
10/03/18 4:21 pm
10/03/18 4:21 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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Yup Roadriders, good tyres ,running 26psi front , 32 psi rear,for the wheel sizes these seem about the best option. Front has been on for a few more miles than the rear. The 5 speed box puts each change right back into the meaty part of the range, loads of fun, probably not that great for tyre mileage, still have some growing up to do..


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] #753149
10/17/18 5:44 pm
10/17/18 5:44 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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"Your real-world MPG average is 66.20, covering 158 miles using 2.39 gallons of fuel."

Take that with a pinch of salt, I got distracted by a bloke in a biler suit while filling up. Started asking me about magneto rewinds, Then a lorry showed up and i had to get the bike out the way, interesting chap, frae Cupar, Has an AJS twin with a dead mag , I suggested Mr kettles near Newtyle, hope he gets sorted.

Weathers mid handover to the Winter witch , the Summer witch hasnt quite let go but surfaces are getting challenging, still hot in the midday sun when its out. Lots of water about, had land slips on the main roads last week. The lowered front mudguard is performing noticeably better, less mung on the motor case line, still tears of dirt along the outer cases.
Tarted up a genuine BSA A65 71 chainguard which will fill an awkward gap on the drive side top run. Noted the strap rivet was loose with the magnolia paint removed, bashed it up a bit till tight, then lashed a tin of Aldis finest black over it ( I painted other stuff with this 2 years ago and it has lasted very well).
Took a run round Kilmelford , Loch Avich, Dalavich , Kilchrenan , last week, the Loch Awe side road has fresh black top, luvvly, no longer a series of poorly connected ruts.
Bike behaving well, pouring it on in 3rd is a load of fun, starts pulling like a two stroke on the pipe from 5k - 6k, didnt do that before. One fly in the ointment, there is a small chuff from the RHS balance pipe, will look at this over the Winter. other than that , luvvin it, Saul Goodman.
Note in the balance pipe pic, paint wear from when I had the rubber tie fitted incorrectly, now its on properly, will daub some tarry residue on it later. Comin up for 10K miles since the resurrection.

Attached Files IMG_0984.JPGIMG_1001.JPGIMG_0998.JPGIMG_0992.JPGIMG_0999.JPG
Last edited by gavin eisler; 10/17/18 7:26 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] #753383
10/19/18 10:17 pm
10/19/18 10:17 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
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argyll. scotland, uk
Its definitely new rubber time, even the missus noticed, LBS has a new one ready to go, hurray for Ali. Centre groove is all but gone. Jetting must be nearly correct.
While looking at the tyre wear i noticed a novel feature, operate the front brake and the cable presses the blade over to the tyre engaging the thin stay with the side wall, a brilliant way to recover lost cable flex braking effort. the mud guard stays have only needed welding up 4 times.

Which brings me to welding.
Where would we be.
Things ive had to get welded from day one,
Exhaust mount N Mc Murtrie
Rear engine mount , cracked at oil tube D Muir
Fuel tank.2 x alloy, 1 x steel. Vibes / corrosion. E kettles and Anon Forfar. G/ Jery Kilmurry Steel tank .
Side stand mount. , temp repair gone when i got it. AJ White
Exhaust balance pipe stubs. badly miss aligned. Aj White
Primary Chaincase, anon Aberystwyth.
air box mount. tapped nut weld fail A Mitchel
Rear sets , R Campbell
Fork stops R Campbell
Centre stand shortening, R Campbell
tank centre mount. chewed beyond recognition. A Mitchel
seat hinges. moved for triumph seat. N Steimens
Air box. Alloy cracked , crash damage.Ace repair N Steimens
Coil bracket. Vibe cracked A Mitchell
Seat to hinges.( temp bodge) J Mercer
head fins x 2 R Longmuir, , Anon Aberystwyth.
welders are brilliant.




Last edited by gavin eisler; 10/22/18 9:14 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] #753628
10/22/18 7:13 pm
10/22/18 7:13 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
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argyll. scotland, uk
New rubber on today, the rear had a scant 1mm of centre groove left, the front showed fairly heavy asymetric wear, presumably from road camber, either that or I am much faster round right handers.
With the back wheel out of the way I changed the chainguard for the tarted up BSA original type, noting that the BSA item has no reinforcement at the mount points , unlike the later Triumph, oh well., looked again in wonder at the original rear brake shoes, still good to go.

With the rear done, the front came under scrutiny, wheel bearings were not 100% , changed for new Koyo 6204s.
Painted the micram adjuster screws with white paint while I was in there. Still tons of life left in the front linings.

The old front was a 90 / 90 x 19, the new one is 3.25, nearly the same width, slightly wider , but 1/2 " taller, meaning new holes in the fork brace. All worked out in the end. A solid afternoons work using the LBS ramp and facilities , many thanks to Ali of North West Motorcycles, Oban. he refused to take reasonable payment, £ 119 for the rear hoop, two new bearings , ramp time and tyre fitting x 2 ( I already had the front on the shelf), Will repay him with some assistance on the 70 T120 that needs its mains looking at.

Setting off there was a slight clang from the chainguard/ joining link/ koni shock interface. Gone by the time I got home. new rubber , woo hoo. Time to wear it out.


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] #754192
10/26/18 11:51 pm
10/26/18 11:51 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
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argyll. scotland, uk
It was running when it was put away.

.
Its still running now.

Took a while though.
New old chainguard, yeh.

Attached Files IMG_0996.JPGIMG_0997.JPGIMG_1002.JPGIMG_1005.JPGIMG_1006.JPG
Last edited by gavin eisler; 10/27/18 12:24 am.

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] #754669
10/31/18 2:36 pm
10/31/18 2:36 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
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argyll. scotland, uk
As mentioned numerous times before I would like a more powerful front brake. The 8" conical is as good as it going to get. Winter is here, went brake hunting in the attic.
Both wheels are rusty and will need rebuilt with new rims.

Candidate no.1 , a 1970 8 " iron hub TLS.
Pros , it has a great rep, wider brake shoes, alloy shoes , iron drum , good combo. Should fit in original front end .
Cons, it will need mods to the torque stay arrangement and the cable end abuttment is broken, no big deal.
Weight complete with old K70, 36 lb, no cable.

Candidate no .2 a 74 ish T140 disc front wheel.
Pros , its a disc, maybe lighter , less unsprung mass. Upgrades like floating disc available, or twin disc even with a spendy RHS slider.

Cons, will need a front end swap, yokes , stanchions , mudguard at the very least. I have been slowly gathering parts for this, Have bottom yokel tree, sliders with LHS caliper mount, front mudguard and brackets/stays. Still need a top yoke T140 V type,
Weight complete with old K181/TT100. 27.6 Lb, brembo 4 pot caliper , 2lb 4 oz, call it 30 lb.

So a potential 6 lb saving over the 70 TLS , possibly more with a lighter floating disc type rotor. Actual rotating mass would be lighter on the disc wheel, maybe, not sure of the brake plate /shoes weight. Picking them up , the disc wheel is noticeably lighter.

Both wheels have steel rims at the mo, whatever I go for will be replaced with a flanged alloy Borrani record.
So another 1 lb or so could come off.
I dont know what the conical wheel assembly weighs, yet. It must be lighter than the 70 TLS but I doubt if there is a lot in it, Conical alloy hub must be lighter than the parallel iron hub, but conical has steel shoes, 70 has ally, so maybe not by much.

I have a 21 st century MV Augusta master cylinder lying around somewhere that would do the bar end stuff.

Watch this space.


Last edited by gavin eisler; 10/31/18 3:30 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] #754728
11/01/18 3:24 am
11/01/18 3:24 am
Joined: May 2013
Posts: 5,082
Rotherham - S. Yorkshire
Allan Gill Offline

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Rotherham - S. Yorkshire
It'd look good with the disc front end Gavin, the unit I brought off John is going to find home on an over CC'd thunderbolt..... Eventually, that and a disc rear end.... But as Christmas looms I need to close the bank on that project for now.


beerchug
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #754746
11/01/18 12:38 pm
11/01/18 12:38 pm
Joined: Feb 2008
Posts: 4,569
New Jersey USA
Tridentman Online content

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New Jersey USA
I have ridden quite a few miles with the conical brakes front and rear and with the standard Triumph single front disc.
The conical front brake can be set up to be quite a powerful brake--contrary to popular legend.
However if you use the right hand in a spirited fashion then it is prone to fade.
Marginal on a 650 but not good on a 750 triple.
On the other hand the disc IMHO is very good.
Some people criticize it as having a wooden feel.
But IMHO infinitely preferable to that sinking feeling as the front brake lever keeps getting closer to the bars as the brake fades going too fast down a steep hill.
Having said that I see no need for a disc on the rear brake---the rear conical is quite sufficient.
I think Triumph fitted the rear disc out of fashion rather than real need.
When you are braking the front brake does about 80% of the work--the rear brake just steadies the bike----you don't want it to be too powerful as the under heavy braking the rear wheel has little weight on it and a too powerful rear brake will just lock the wheel.
Just my two cents worth of course.
HTH

Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #754749
11/01/18 1:23 pm
11/01/18 1:23 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
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argyll. scotland, uk
Hi T man, I am on the same page as you regarding the rear brake, the rear drum is very sensitive , ideal for loose road surfaces , gravel and stuff. pretty much maintenance free, no caliper hanging in the road spray to worry about.
Its definitely staying. Thanks for your insight into the disc, i remember roasting about on the BSA alongside my friend on a T140, it would always out brake the BSA. I understand the disc wooden feel can be tuned out by using a smaller bore master cylinder for more feel. My feelings on the front conical, it needs regular routine adjustment to stay effective, those micrams are hard to spot, white paint makes life a little easier but its the adjustment that needs most frequent attention on this bike. Wort of all the completely unbraced front end twists due to the flimsy mudguard mount, the brace has helped, this is dealt with on the disc front end with far sturdier mudguard mounts.
The front conical water scoop has given me a few scares in the wet, theres a definite lag between application and retardation. In the dry It has a strong self servo action with good initial bite, problem is , squeezing harder doesnt seem to bring much more to the party. It would be adequate for a lighter single, its not enough for a 732 twin. I like the look of it, and the simplicity, but if the disc is lighter and more powerful, that wins for me.
I have looked around for possible Japanese front ends , but , cant bring myself to go there, its staying British.
To Any one reading this with a conical front brake, I reccomend quality linings, Vintage brake , Villiers or in my case Saftek, these were hands down the biggest improvement, second, a good thick cable, and a doubtful third , extended levers, for me these improved the feel, but did little for extra effort. Even after all that its still an eight inch drum, not a ten inch disc.

Last edited by gavin eisler; 11/01/18 1:34 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] #754755
11/01/18 2:36 pm
11/01/18 2:36 pm
Joined: Oct 2012
Posts: 4,107
Running from demons in WNY
Hillbilly bike Online content
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Running from demons in WNY
I prefer disc brakes for the control and consistency they offer just short of lock up when compared to a drum...Riding fast on back roads and then slowing for a curve, a good back brake can slow the bike into the turn without causing the bike to stand up and run wide as the front brake can do...
I also feel the conical front drum set up properly works nicely on a light bike and is just fine...
The stock disc brakes on my 79 T140 work ok ,but the "wooden" feel and excessive hand pressure need to slow from sporting speeds is a distraction. I dechromed the disc and with a 13 mm master cylinder there's a noticeable difference.. The rear disc, in my opinion,takes too much foot pressure, another distraction..
I have a 96 900 Ducati Monster weighing the same as the Triumph...Obviously the Ducati has a much higher level of performance but with twin 320 mm front discs and a nicely weighted read disc, the braking is very confident....You never can have too much braking on a bike... grin


I take off bike parts until it doesn't function, then put on just enough so it functions
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #754757
11/01/18 3:57 pm
11/01/18 3:57 pm
Joined: Aug 2015
Posts: 1,290
Bolton Lancs UK
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Andy Higham Offline
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"You never can have too much braking on a bike... grin"
I remember reading an american magazine (it may have been cycle world) road test on the T140. They complained it was "over braked"


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Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #754758
11/01/18 3:58 pm
11/01/18 3:58 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
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argyll. scotland, uk
Talking drum brakes, the Victor Library is a great resource for comparing different brakes from the past.
Heres a table of brake capacities for a 400 lb bike, brakes sized for various max speeds. Snipped from that source,
Front drum capacity is based on swept area, diameter, and number of leading shoes.

An Explanation from the Victor site
Estimating size
As a rough guide to estimating minimum front drum brake efficiency, a “ß” equal to 30% of total chassis weight (motorcycle + rider) in lbs. will provide adequate stopping power for street use. For performance use 40% is preferred. High speed requires more; as a correction factor use the cube of your anticipated top speed divided by 100.
In Table 3, following, these values have been applied to a range of total chassis weights for reference. For street use, locate your chassis weight in Row 1, and find your minimum ß below it in that Column in Row 2. For high performance and racing use, locate your chassis weight and estimated maximum speed in Rows 3-5, and find your minimum ß below it in that Column depending on your speed. Consult Table 2 (above), last Column for ß values to find a suitable front brake.
Please note that only the largest are suitable for high speed, and even then only with fairly light total chassis weights."

The numbers from row 2 , " Street use"

Table 3: Chassis Weight vs. Front Drum Capacity
Weight, lbs. 400

Minimum ß, 30% 120
Minimum ß, 40% @ 100 mph 160
Minimum ß, 40% @ 110 mph 213
Minimum ß, 40% @ 120 mph 276

8" Conical , 171 ( my figure)
8" TLS , 186 * Victor Library)
just about OK

When rows 3 and 5 are looked at the numbers get much higher.



The 8" Concal and the 8"TLS are both rated 186, however there is an error in the calc for the conical, listed as having 38 mm wide shoes , the Victor table has it at 41.3 same as the TLS. I make it 171 and change for the conical using the 38 mm width. Sadly i cannot find corresponding figures for discs.


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] #754760
11/01/18 4:04 pm
11/01/18 4:04 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
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gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
"You never can have too much braking on a bike... grin", fer sure, my Cagiva has twin 298mm discs with 4 pot Brembos, one of the reasons i find the BSA conical lacking.


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] #754782
11/01/18 7:32 pm
11/01/18 7:32 pm
Joined: Aug 2015
Posts: 1,290
Bolton Lancs UK
A
Andy Higham Offline
BritBike Forum member
Andy Higham  Offline
BritBike Forum member
A

Joined: Aug 2015
Posts: 1,290
Bolton Lancs UK
My Aprilia hat twin 320mm brake rotors with 4 pot individual pad Brembos, It can slow down gently, or stop like it hit a stone wall and everything in between


BSA B31 500cc "Stargazer"
Greeves 200cc "Blue Meanie"
Greeves 350
Greeves 360 Challenger
Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc "Llareggub"
2003 Aprilia RSV Mille "Lo Stregone"
'35 OK Supreme
'36 OK Supreme
Re: alloy barrels + 5 speeds A65 750 OIF 1971 [Re: gavin eisler] #754794
11/01/18 9:51 pm
11/01/18 9:51 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
One unexpected bonus , I dont have to worry about de chroming the disc, still no joy on the top yoke front, it appears there are two variants of T140 V , one with symmetrical horns, one with a bevelled in go , something to do with brake lines possibly. I dont know. Had a good browse of the Borrani site, there is a superlight option , phwhoar, better get one soon before the pound totally tanks.


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] #755343
11/07/18 6:42 pm
11/07/18 6:42 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
Disc options discussion here.
http://www.britbike.com/forums/ubbthreads.php/topics/755341#Post755341
Slowly gathering bits for this.


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] #756064
11/14/18 8:45 pm
11/14/18 8:45 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
Some bits are appearing. After chatting with the nice Triumph Chaps , settled on twin discs.
For the record , a 1970 complete front wheel with rubber, steel rim and brake plate weighs 36lbs.
A triumph single disc wheel complete with 2lb Brembo and disc ( all I had handy), is 30lbs. One disc alone weighs 4lbs 4 Oz , undrilled. Will weigh the conical, I am fairly sure its lighter than the 70 , but not by much.

Plan for the Winter, Tank electrolysis. I had one moment this year when accelerating a sudden drop to one cylinder, which turned out to be trash in the first banjo filter / float bowl.

Twin discs. I have been at this lately. , alloy AP copy calipers, a 3 stay 74 triumph front mudguard which came up on eBay the first or second time I looked, Borrani rim 19"WM2.
Corresponded with the Borrani dealer in Italy, took hub measurements to get drill pattern A for a disc hub.Have made the deal, .
What I have got so far, spokes, yokes, sliders RHS and LHS with disc mounts, end caps, hub , bearings, axle etc.

Waiting for seals ,stanchions, rim , master cylinder (19 mm Radial, wooo ), kill switch , brake lines.
All but the brake lines are in the post, will make up SS twin Goodridge lines once the bits are in position.
Still to buy , a 2nd disc. Still to do.
Loads. Rebuild the whole lot. Some stuff is done, pressed in new P bracket bushes, sorted out all new nuts and bolts, cleaned a few heads on the lathe, polished the scabby LHS slider up to match the new RHS.
Might keep the old flat back lamp in the meantime, mounted on alloy brackets, clocks should swap right over.

The springs will be copied with new ones , once I strip the front end, count the working coils and the diameter.I stupidly deleted this info from my PM inbox when having a clearout. All I have is this from the thread previously.

John ( Kommando) if you are reading this can you remind me who the custom spring people are.

"MZ springs chopped to 400 mm, 27 mm spacers will give lowered ride height by 27mm and 22 lb/inch if all the sums are right,". Which makes me think of kevin, he could maybe use the cut down springs and spacers for his speed machine.

Any way, the job at the mo is hub stripping, even methyl Chloride (Sp) struggles at 5C, after 4 applications theres still 10 percent paint left, rubbing this down by hand is tedious, Ive started and stopped twice already.


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] #756149
11/15/18 4:39 pm
11/15/18 4:39 pm
Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
gavin eisler Offline OP
BritBike Forum member
gavin eisler  Offline OP
BritBike Forum member

Joined: Aug 2001
Posts: 4,190
argyll. scotland, uk
messing around with the hub and spokes , found out the spokes need a slight bend to clear the hub rim, fixed that .
pie crust achieved with round file 21 strokes for each slot.
Pic 1 easy spoke entry with pie crust
Pi2 difficult entry, no pie crust.
Pics 3 and 4 test assembly new mudguard , stays and sliders.

The borrani dealer is waiting for MR B to make my rim, 3 week wait. Time to paint the hub.

Attached Files IMG_1028.JPGIMG_1029.JPGIMG_1030.JPGIMG_1031.JPG

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Page 37 of 38 1 2 35 36 37 38

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