Author Topic: gearbox output shaft  (Read 2005 times)

Online chaterlea25

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Re: gearbox output shaft
« Reply #15 on: 19.11. 2015 22:59 »
Hi All,
Quote
Suzuki GS550 clutch conversions worth considering

Another of the roundtoit jobs in the workshop  *sad2* *sad2*

John
1961 Super Rocket
1963 RGS (ongoing)

Offline Rocket Racer

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Re: gearbox output shaft
« Reply #16 on: 19.11. 2015 23:01 »
There are quite a few threads on clutch conversions; if you can have a clutch with a good bearing arrangement the plates lift much cleaner. Most of the issues with 6 (and 4) spring plates result from the basket having too much bearing slop in conjunction with a narrow centre rod lift; so the plates lift crookedly and the basket wobbles. A decent clutch bearing for the clutch basket makes all the difference.
Off the shelf modern clutches are available and worth the investment or if you can access an engineer the gs550 clutch can be adapted.

I've always thought the 6 spring was suitable for a fifties washing machine...  *whistle*
A good rider periodically checks all nuts and bolts with a spanner to see that they are tight - Instruction Manual for BSA B series, p46, para 2.
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Offline coater87

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Re: gearbox output shaft
« Reply #17 on: 19.11. 2015 23:23 »
I know about the Phil Pearson clutch, but who else makes clutches that will fit our bikes? I thought we only had 3 chooses, 4 or 6 spring, or Phil Pearson....
Central Wisconsin in the U.S.

Offline Rocket Racer

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Re: gearbox output shaft
« Reply #18 on: 20.11. 2015 00:21 »
NEB and Bob Newby Racing both come to mind, I'm sure there are others.
The Phil Pearson one was / is (?) suzuki based.
Or likewise there is the SRM 4 spring pressure plate (to improve the lift method -has a top hat bearing arrangement I recall)

As soon as you start deviating from stock the next question is belt or chain driven.
My locally modified suzuki clutch is still chain drive but I really love my BNR belt drive on the race bike.
I do still run a 4 spring on the 500 single and it works, wouldnt be my first choice but it works.
A good rider periodically checks all nuts and bolts with a spanner to see that they are tight - Instruction Manual for BSA B series, p46, para 2.
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Online Topdad

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Re: gearbox output shaft
« Reply #19 on: 20.11. 2015 11:49 »
Don't know if He's still working but there was a guy in Flint North wales called Tony Hayward ,used to advertise in all classic mags ( don't get them now ) from what I heard his stuff was excellent and cheaper than Pearsons stuff, Bob
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Offline taylor1960

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Re: gearbox output shaft
« Reply #20 on: 22.11. 2015 11:41 »
Food for thought  *conf* do U just use the japanese plates in bsa basket i have looked @ the treds looks a good job but alot of $ for shop made ones im a real DIY on a budget  *ex* lol   *smiley4*
1960 BSA A10
1999 Honda CB 500
1978 Can-Am Bomardier

Offline Rocket Racer

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Re: gearbox output shaft
« Reply #21 on: 23.11. 2015 04:18 »
Food for thought  *conf* do U just use the japanese plates in bsa basket i have looked @ the treds looks a good job but alot of $ for shop made ones im a real DIY on a budget  *ex* lol   *smiley4*

The plates arent the problem in the beesa clutches, its the naff bearings on the basket that flop about that makes the 6 and to a lesser extent the 4 springs the mediocre clutches they are  *roll*

Starting from scratch on a budget keep your eyes open for a complete or a near complete used 4 spring, these should be cheap enough. Converting a Suzuki one was fairly cost effective and a far superior outcome, but a bit of faffing about.
A good rider periodically checks all nuts and bolts with a spanner to see that they are tight - Instruction Manual for BSA B series, p46, para 2.
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Offline taylor1960

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Re: gearbox output shaft
« Reply #22 on: 28.11. 2015 22:22 »
Hi all have my output shaft on its way to me  *smiley4* also just got a 4 spring clutch centre need plates and  springs etc all good  *smile* realy injoying the forum
1960 BSA A10
1999 Honda CB 500
1978 Can-Am Bomardier

Offline taylor1960

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Re: gearbox output shaft
« Reply #23 on: 16.12. 2015 22:21 »
Well all got my gearbox back together thanks to Rocket Racer  *smile* built it at work wit my work mate Andy who has a Aerial 500 in out lunch break *conf* hope to get all in frame over Xmass thanks for all your help  *smile*
1960 BSA A10
1999 Honda CB 500
1978 Can-Am Bomardier

Offline Rocket Racer

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Re: gearbox output shaft
« Reply #24 on: 16.12. 2015 23:16 »
Only too pleased to be of help, look forward to seeing it take shape  *wink2*
A good rider periodically checks all nuts and bolts with a spanner to see that they are tight - Instruction Manual for BSA B series, p46, para 2.
New Zealand

Offline bikerbob

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Re: gearbox output shaft
« Reply #25 on: 17.12. 2015 08:18 »
I have 1956 A7 with the six spring clutch and agree that the bearings in the basket do cause problems, but Draganfly have a new modified bearing for the six spring clutch it is bearing casing where you insert the double row of balls and is much easier to fit. I fitted one last year and have just checked it and it is Ok also with this bearing fitted there is now no wobble on the clutch basket. I had a four spring clutch fitted to my Gold Flash for sixteen years prior to selling it  but comparing it to the six spring clutch I now have on the A7 with the modified bearing I see no advantage in changing the clutch provided that they are both adjusted correctly.

Offline taylor1960

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Re: gearbox output shaft
« Reply #26 on: 17.12. 2015 08:32 »
Thanks all im still lookn i will have to wate to new year for clutch but if any one has a spare one kicking about let me no  ;)
1960 BSA A10
1999 Honda CB 500
1978 Can-Am Bomardier

Offline taylor1960

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Re: gearbox output shaft
« Reply #27 on: 14.01. 2016 14:35 »
Now that i have my box built and in the bike thanks to Rocket racer  *smile* i now need a new sprocket it had a 19 tooth is that a best allrounder  *????* as i will only be solo and doing long trips but im also a big lad  *ex* have also a 6spding clutch now to fit thanks to klaus all going well  ;)







Klaus
1960 BSA A10
1999 Honda CB 500
1978 Can-Am Bomardier

Online chaterlea25

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Re: gearbox output shaft
« Reply #28 on: 14.01. 2016 18:51 »
Hi,
19 tooth is standard, the usual (easier) way to change the gearing is to change the engine sprocket
gearing is also dependant on the state of tune of the engine
Plenty sprockets on
http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=a10+gearbox+sprocket&_sacat=0

HTH
John
1961 Super Rocket
1963 RGS (ongoing)

Offline taylor1960

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Re: gearbox output shaft
« Reply #29 on: 14.01. 2016 20:40 »
Thanks my box & engine are standard will stick to 19 tooth then   
1960 BSA A10
1999 Honda CB 500
1978 Can-Am Bomardier