Author Topic: 4 or 6 spring clutch  (Read 771 times)

Offline berger

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  • keith from chesterfield 500ss cafe morris 8
Re: 4 or 6 spring clutch
« Reply #45 on: 02.10. 2019 21:45 »
and here is the spare  chainwheel

Online Triton Thrasher

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Re: 4 or 6 spring clutch
« Reply #46 on: 02.10. 2019 22:10 »
This is my Tony Hayward belt drive basket that takes a Triumph 3-spring centre.

I glued cork mat to it instead of starting with a lined plate.  It meant I got an extra plate into the clutch.

I also picked the lining off the Surflex lined plates and glued cork mat to them as well. 

After all that, the clutch no longer slipped, even with the spring adjusters backed off to a light pressure.



Online RDfella

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Re: 4 or 6 spring clutch
« Reply #47 on: 02.10. 2019 22:32 »
A diaphragm clutch (eg Norton) would be better still. The further you release it, the lighter it gets, whereas coil springs work the other way round.
'49 B31, '49 M21, '53 DOT, '58 Flash, '00 Firestorm, Weslake sprint bike.

Online muskrat

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Re: 4 or 6 spring clutch
« Reply #48 on: 03.10. 2019 13:11 »
G'day RD.
I agree. The Notrun diaphragm clutch on my Cafe is a joy to use. It does squeal a bit on spirited takeoffs.
Cheers
'51 A7 plunger, '57 A7SS now A10CR, '76 XT500, '77 AG175 '83 CB1100F, '81 CB900F project.
Australia
Muskys Plunger A7

Offline Rocket Racer

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Re: 4 or 6 spring clutch
« Reply #49 on: 07.10. 2019 01:22 »
I did try a suzuki clutch which was very good compared to a 4 spring, but on my race engine... love my Bob Newby Racing (BNR) clutch, never given me any trouble and goes brilliantly with a TT industries 6 speed BSA box.  *whistle*
http://www.bobnewbyracing.co.uk/products.html?LMCL=joPaTW&LMCL=EYL6NV

the old pre unit 6 springs can be made to work reliably but are not great, the 4 springs were better but if money permits better options exist and beware of rubbish pattern parts
A decent belt drive quietens down a motor significantly

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