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A65 caf #416170
01/30/12 9:10 pm
01/30/12 9:10 pm
Joined: Jan 2012
Posts: 123
england
lilo Offline OP
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lilo  Offline OP
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Joined: Jan 2012
Posts: 123
england
Got this old nail a couple of years ago and it's been sitting in the shed while I wondered if I should sell it or do it up.



Anyway after a lot of thought I have decided to make it into a firebreathing dragon.

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Re: A65 caf [Re: lilo] #416248
01/31/12 3:52 am
01/31/12 3:52 am
Joined: Jan 2012
Posts: 26
Ex-pat Englishman living in Mi...
B
Basketcases57 Offline
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B
Joined: Jan 2012
Posts: 26
Ex-pat Englishman living in Mi...
Looks interesting. I agree with your comments on the A65's proportions but this looks pretty ambitious(read expensive). How are you modifying the frame there? cut/remove/bend/then re-fit/weld? and what the heck are you using for the swing arm mod?

cheers.

-Ian in Michigan


1970 BSA A65L project in progress
1983 Honda CB650SC daily rider
Previously:
Mid-Sixties Triumph 3TA
Mid sixties BSA C15
various D14 Bantams
A Lambretta J125, multiple Japanese bikes, and a 1970 Puch Maxi moped...
Re: A65 caf [Re: lilo] #416585
02/02/12 2:07 pm
02/02/12 2:07 pm
Joined: Jan 2006
Posts: 6,959
Laredo (South) Texas, USA
GrandPaul Offline
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GrandPaul  Offline
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Posts: 6,959
Laredo (South) Texas, USA
Welcome, lilo.

"Interesting" barely gets the sentiment across. There certainly won't be another like it ANYWHERE you park!

Anything nice inside the egg?


GrandPaul (does not use emoticons)
Author of the book "Old Bikes"
Too many bikes to list, mostly Triumph & Norton, some BSA & European
"The Iron in your blood should be Vintage"
Re: A65 caf [Re: lilo] #416649
02/02/12 8:46 pm
02/02/12 8:46 pm
Joined: Jan 2012
Posts: 123
england
lilo Offline OP
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lilo  Offline OP
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Joined: Jan 2012
Posts: 123
england
The plan is an 840.

Re: A65 caf [Re: lilo] #417366
02/06/12 9:55 pm
02/06/12 9:55 pm
Joined: Sep 2002
Posts: 7,813
Seattle
Alex Offline

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Alex  Offline

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Joined: Sep 2002
Posts: 7,813
Seattle
Looks interesting. I particularly like that frame mod. With regards to that, tho: Is that the oil tank that you're going to use? It seems to defeat the purpose of the frame mod...


A smattering:
'53 Gold Flash
'67 Royal Star
'71 Rickman Metisse
'40 Silver Star
'37 Rudge Special
sixtyseventy Lightboltrocket road racer...and many more.
Re: A65 caf [Re: lilo] #417469
02/07/12 7:10 pm
02/07/12 7:10 pm
Joined: Jan 2012
Posts: 123
england
lilo Offline OP
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lilo  Offline OP
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Posts: 123
england
It's not finished yet.
Watch this space.

Re: A65 caf [Re: lilo] #417596
02/08/12 2:53 pm
02/08/12 2:53 pm
Joined: Jan 2006
Posts: 6,959
Laredo (South) Texas, USA
GrandPaul Offline
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GrandPaul  Offline
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Joined: Jan 2006
Posts: 6,959
Laredo (South) Texas, USA
This is definitley one of the better custom BSA projects around the forums lately.


GrandPaul (does not use emoticons)
Author of the book "Old Bikes"
Too many bikes to list, mostly Triumph & Norton, some BSA & European
"The Iron in your blood should be Vintage"
Re: A65 caf [Re: GrandPaul] #417617
02/08/12 5:07 pm
02/08/12 5:07 pm
Joined: Feb 2003
Posts: 2,930
Ohio
R
Rickman Offline
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Rickman  Offline
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R
Joined: Feb 2003
Posts: 2,930
Ohio
I too like the effort applied to this personally customized project. Shows a LOT of thought and initiative! bigt clap

I'd like to bring up one point though, my own observation, if you will? A warning, perhaps???

I believe the brake pedal you have pictured/installed, may be way too short?

I cannot tell if the rear wheel is a BSA one or not, except in the original pic, nor do I know what the rear wheel will really be, once the project is finished, but I for one, have never been happy with the BSA brakes ability to provide enough stopping power, and your having cut the brake lever length more than in half, will make a BSA's braking action harder to accomplish.

Just a warning you may want to keep in mind?

I'd like to see you keep us informed of any progress, this IS a neat project!
Brett
P.S. What are your plans for the original stock rear wheel, or either of the stock fuel tanks, if you do not use them?

Re: A65 caf [Re: lilo] #417669
02/08/12 9:46 pm
02/08/12 9:46 pm
Joined: Jan 2012
Posts: 123
england
lilo Offline OP
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lilo  Offline OP
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Joined: Jan 2012
Posts: 123
england
Thanks for the comments.
I know what you mean about the rear brake lever but in all honesty it's not difficult to lock up a conical rear brake.
When you put rearsets onto a RGS or Goldie the lever is about half the length of the original and these have been used for racing for years.

Any advice or ideas gratefully received. It's all experimental and the proof of the pudding is in the eating.

Hopefully at the Manx this year.

Lilo.

Re: A65 caf [Re: lilo] #424526
03/16/12 3:04 pm
03/16/12 3:04 pm
Joined: Jan 2006
Posts: 6,959
Laredo (South) Texas, USA
GrandPaul Offline
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GrandPaul  Offline
BritBike Forum member
Joined: Jan 2006
Posts: 6,959
Laredo (South) Texas, USA
That bike is looking mean.


GrandPaul (does not use emoticons)
Author of the book "Old Bikes"
Too many bikes to list, mostly Triumph & Norton, some BSA & European
"The Iron in your blood should be Vintage"
Re: A65 caf [Re: lilo] #425048
03/19/12 9:35 am
03/19/12 9:35 am
Joined: Feb 2010
Posts: 441
Au
M
markoz Offline
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markoz  Offline
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M
Joined: Feb 2010
Posts: 441
Au
That just looks so dam good. A brave job that looks like its going to pay off,
I want more.
Cheers Mark

Re: A65 caf [Re: lilo] #425626
03/22/12 12:01 pm
03/22/12 12:01 pm
Joined: Aug 2001
Posts: 3,870
argyll. scotland, uk
gavin eisler Offline
BritBike Forum member
gavin eisler  Offline
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Joined: Aug 2001
Posts: 3,870
argyll. scotland, uk
I once had a Dunstall 2 into one pipe that looked a bit like that,
it was difficult to keep the headers in the ports and I gave up on it after too many pop outs. Anything over 5K and it would spit out a pipe, would have been better if the headers were tied together near the ports. Sweet curves though. I really like your central oil tank, the side panels always looked a bit pregnant to me.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: A65 caf [Re: lilo] #425676
03/22/12 7:16 pm
03/22/12 7:16 pm
Joined: Jan 2012
Posts: 123
england
lilo Offline OP
BritBike Forum member
lilo  Offline OP
BritBike Forum member
Joined: Jan 2012
Posts: 123
england
Hi Gavin.
Your pm box is full.

What combination of components do you use for your long srtoke BSA engine?

I'm struggling to find the mix of crank rods and barrels to get an 840cc.

Re: A65 caf [Re: lilo] #425734
03/23/12 12:31 am
03/23/12 12:31 am
Joined: Aug 2001
Posts: 3,870
argyll. scotland, uk
gavin eisler Offline
BritBike Forum member
gavin eisler  Offline
BritBike Forum member
Joined: Aug 2001
Posts: 3,870
argyll. scotland, uk
70 thick flange barrels ( studs relocated and upsized on 68 cases) , stock late steel end cap rods , DA10 crank, T140 pistons, displaces around 770 cc.
SRM / Devimead used to offer the big bore barrels in two heights , one for 750 stock stroke, one for 840 long stroke, recent posters here suggest these are unobtainable from SRM. Although there is a guy in germany making alloy barrels for A65 to whatever spec you fancy. Call SRM, I have found them very helpful over the years, its possibly a casting batch numbers thing. I dont reccomend the T140 pistons ( they work with A10 crank and stock rods cos the crown to pin height is less than stock A65), my long stroke is prone to pinking, the short stroke 750 is my favourite motor, smoother than stock 650 . Both have end fed converted cranks, the 750 in OIF is an original Devimead sidecar racing motor with all the dogs danglies, cost me 400 in 1980.

Have you seen Mark Parkers bike with the staggered (90degree IIRC) crank pins, he cast his own barrels.
Start saving coke cans!

Last edited by gavin eisler; 03/23/12 12:43 am.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: A65 caf [Re: lilo] #426060
03/24/12 8:59 pm
03/24/12 8:59 pm
Joined: Mar 2012
Posts: 6
Northern Ireland UK
A
A65L rebuild Offline
BritBike Forum member
A65L rebuild  Offline
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A
Joined: Mar 2012
Posts: 6
Northern Ireland UK
Hi Mate,

Totally impressed with the innovation _ and deep pockets cry

Are those pipes not UNA75 item at Unity spares??? I was gonna try them on my A65 and they look similar to yours.

Unity Spares Ltd (Special Equipe)
Quality Works, 1st Floor, Old Fire Station,
Rochdale Road,
Todmorden, Lancs
OL14 7NA
UK.
Tel: 01706 839059. Fax: 01706 839348

fair play to you - it's looking good and totally respect the 1% aspect !

Re: A65 caf [Re: lilo] #426254
03/25/12 8:07 pm
03/25/12 8:07 pm
Joined: Aug 2001
Posts: 3,870
argyll. scotland, uk
gavin eisler Offline
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gavin eisler  Offline
BritBike Forum member
Joined: Aug 2001
Posts: 3,870
argyll. scotland, uk
A second brace for the swing arm behind the pivot tube would help overall stiffness. Check the kick-start lever doest hit your shin bone when seated, I had too heat and bend my lever with a similar layout. I think Unity use to sell these as "TT" pipes, they make access to the sump plate impossible.

The rear axle mount is beautiful, reminds me of Seeley stuff,

Last edited by gavin eisler; 03/25/12 8:10 pm.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: A65 caf [Re: lilo] #431184
04/22/12 9:48 pm
04/22/12 9:48 pm
Joined: Dec 2008
Posts: 2
AR
A
alpinaclone Offline
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A
Joined: Dec 2008
Posts: 2
AR
I love the work so far. What diameter and wall tubing did you use for the swingarm? I am planning something similar on my Tiger.

Re: A65 caf [Re: gavin eisler] #453854
09/10/12 7:36 pm
09/10/12 7:36 pm
Joined: May 2006
Posts: 198
Tynset Norway
O
oleandreas Offline
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oleandreas  Offline
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O
Joined: May 2006
Posts: 198
Tynset Norway
Really nice cafe racer project smile

I support the idea of shorter rake and longer swingarm.

I have Spitfire 1968, based on the philosophy of looking close to stock. Because of that I have so far choosed to keep the swing arm and front end, only improved with self made longer bronze bushings and a fork brace hidden up under the lower triple three, It made the fork better, but not like a ceriani smile.

As for engine I made a 892 ccm A65 engine, seems to work fine, though a bit more viberations. The crank is balanced to 84 %, better would be 72 %.

Using Commando crank (better would be getting a billet made) stroke 89 mm. and SRM Big bore cylinder, bore 80 mm. custom made Aluminium Thunder engineering conrods on 157 mm, JE Pistons (from BSA B44) from ED V in USA. 9:1 in comp. increased valves, race camshaft, stiffer springs, ported head, belt drive makes 10 % lower speed on the engine, outrigger bearing behind the clutch... It all works fine so far, and its as fast as a Norton Commando 920 ccm.

As for my philosophy I still use AMAL 32 mm consentrics.
A increase in comp and bigger carb would surly give more power.

As Gavin writes Rainer Traupel in Hamburg makes Aluminium cylinders for A65, but they are limited in bore to around 77, He uses nicasil coating. Rainer was the man to machine my commando crank to fit A65.

The biggest challenge for me was the short cylinder. I was not able to get hold of the longer A65 big bore cylinder, and therefore needed to use very short conrods.

If anyone knows of a long big bore cylinder Im would be happy to buy.

Ole Andreas, Norway

Re: A65 caf [Re: lilo] #461333
10/31/12 5:11 am
10/31/12 5:11 am
Joined: Oct 2002
Posts: 549
minnesota
J
joe a. Offline
BritBike Forum member
joe a.  Offline
BritBike Forum member
J
Joined: Oct 2002
Posts: 549
minnesota
hi lilo,
nice craftsmanship..i like it all but the swing arm and rear axle adjusters are really trick looking. i have never heard of those shocks, where are they made?
good luck,joe @v cycle


Last edited by joe a.; 10/31/12 5:11 am.
Re: A65 caf [Re: lilo] #461553
11/02/12 2:13 am
11/02/12 2:13 am
Joined: Oct 2001
Posts: 541
Howard City, MI
E
Ed V Offline

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E
Joined: Oct 2001
Posts: 541
Howard City, MI
Way better than the chopper bobber bunch huh Paul

Re: A65 caf [Re: lilo] #462730
11/11/12 4:23 am
11/11/12 4:23 am
Joined: Apr 2005
Posts: 2,380
Bega NSW Australia
Mark Parker Offline
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Mark Parker  Offline
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Joined: Apr 2005
Posts: 2,380
Bega NSW Australia
Quote "I think you can cut off the top fin of the standard barrels and bore it out to take B44 pistons which have a crown closer to the gudgeon pin and use an A10 crankshaft.
This gives a 840cc motor.
One problem is to find some A65 barrels that are drilled centrally to the castings and can be bored out."
You cannot do this with std cyls, even sleeving them because (1) it makes them to thin and weak, and (2)The head bolt and stud dia are too big and too close to the bore and distort it when done up, even boring and honeing with a torque plate, I've tried it and its not worth the wasted effort. I made patterns and cast alloy ones, Nikasil in my view is the best way to go, as again there is not space for a liner, (not that I can work out anyway), but nikasil works better. Bolts and studs are smaller diameter and do not distort the bore. I have been using Ed V's JE 79.5mm B44 pistons and rings for a few years and the motor is now putting out 78HP on the data logger, ring seal is still excellent.


mark
Re: A65 caf [Re: lilo] #463457
11/15/12 9:59 pm
11/15/12 9:59 pm
Joined: Jan 2012
Posts: 123
england
lilo Offline OP
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lilo  Offline OP
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Joined: Jan 2012
Posts: 123
england
Thanks for the advice Mark.
I'm building a file of info to try and build the best big bore motor. It could be expensive!

Just got the rear end light and plate mount mocked up.




Re: A65 caf [Re: lilo] #463497
11/16/12 2:37 am
11/16/12 2:37 am
Joined: Apr 2005
Posts: 1,644
Mississauga, Ontario.
A
Adam M. Offline
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Adam M.  Offline
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A
Joined: Apr 2005
Posts: 1,644
Mississauga, Ontario.
Would use longer rear fender, but understand the problem of having rear light under the seat and on the top of the plate smile.
Great build anyway.

Re: A65 caf [Re: lilo] #463612
11/16/12 9:59 pm
11/16/12 9:59 pm
Joined: Jan 2012
Posts: 123
england
lilo Offline OP
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lilo  Offline OP
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Joined: Jan 2012
Posts: 123
england
This is a mockup Adam.
Don't worry, that won't be the final mudguard.

Re: A65 caf [Re: lilo] #471433
01/08/13 10:26 pm
01/08/13 10:26 pm
Joined: Apr 2011
Posts: 619
North Coast, BC, Canada
Two Alpha Offline

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Posts: 619
North Coast, BC, Canada
Looking good!


BSA
Matchless
Triumph
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