SOHC.co.uk Forums > CB750
First Gear Crunch
K2-K6:
If it's pulling away smoothly without snatching on takeup, that suggest the plates aren't in bad condition so maybe not the first point of attention.
They, along with many bikes, only just release when the lever is fully actuated with not much spare travel to play with.
Operating system worth verifying first. Clutch lever pivot should have no play radially else it'll just not pull the cable fully before touching bars. Originally they had a good quality cable with internal plastic lining that makes operation easier.
Clutch end should be adjusted first without cable hooked up, wind screw in until it touches, back out 1/8 to 1/4 turn ( manual says 1/4 to 1/2 turn) then leave it alone. The slack is to avoid the operator mech pushing the clutch when hot.
Finally, install the cable making sure you don't adjust out the slack you've just put into the operating arm.
It should now move the arm starting with just under 90degree angle between cable and arm, to just over when fully pulled. That setup should give you the most lift on the clutch plates and hence the best release available to you.
bucksfizz:
Wow, thanks for the very comprehensive clutch setup routine, K2-K6.
The clutch take-up is smooth; it's first gear that graunches, and I can feel the shafts are moving, which is causing the noise.
Other gears can be noisy when shifting.
I was going to tackle this job first thing tomorrow morning, but I'm volunteering at Haynes Bikers' Ride-in.
Bryanj:
There has been a recent discussion about the mod on the US site if you look there.
royhall:
Correct me if i'm wrong, but wasn't that mod to stop the rattling not the gear crunch?
Bryanj:
Dunno, never owned a 750 to run
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