The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Gearbox, Clutch, Primary => Topic started by: a101960 on 18.11. 2017 23:47

Title: 4 Spring clutch
Post by: a101960 on 18.11. 2017 23:47
After riding for a while my gear change seems to deteriorate. For the sake of clarity, by that I mean the pedal action noticeably stiffens, and selecting neutral becomes difficult. Another symptom is that 1st sometimes crunches, or is difficult to select. This is especially so when stationary. When I initially set out for a ride the gear action is noiseless and precise, so it seems fairly clear to me that as the clutch warms up the plates are possibly expanding and causing this problem. I am using ATF by the way. Would backing the springs off a bit help to resolve this problem? and if so how far would they have to be unscrewed? half a turn, or a bit more maybe? I know this a bit like how long is a piece of string, but some guidance would be useful before I go diving in.
Title: Re: 4 Spring clutch
Post by: duTch on 19.11. 2017 00:36

 Plenty of oil in the 'box I presume ?
Title: Re: 4 Spring clutch
Post by: a101960 on 19.11. 2017 01:37
Quote
Plenty of oil in the 'box I presume ?
Yes duTCH I am very meticulous about oil levels in both gear box and engine. My philosophy has always been that oil is far cheaper than engine or gear box rebuilds.
Title: Re: 4 Spring clutch
Post by: muskrat on 19.11. 2017 02:48
G'day John.
Sounds like clutch drag to me. Friction plates expanding when hot.
I'd only back off 1 turn. This is assuming ALL adjustments (arching through 90 degrees and cable) are correct and the pressure plate lift is square.
If using auto fluid use type F.
Cheers
Title: Re: 4 Spring clutch
Post by: Billybream on 19.11. 2017 05:54
Agree with Muskrat on drag, also check out the push rod and the ball in the actuating arm.