reginald, on 13 June 2012 - 12:34 PM, said:
Had the clutch actuating arm lengthened by 3mm, and fitted domino off no. 2 bike and its nice and light but now I can't disengage the clutch fully without using my whole hand i.e. holding the lever in so it hits my other two fingers does not disengage it fully.
That's the problem I found when trying to set up my Jumbo clutch. The actuator travel is generally not enough to allow the plates to clear properly, therefore they can drag. If you adjust it to clear the drag you can get slip in the higher gears or even 3rd and 4th if you're howling it in sections. The clutch is also slow to take up when it is like that. They're a real pain to set up and vary from bike to bike.
Lengthening the arm makes it lighter in action but worsens the affect on the actuator as you need more travel on the lever to clear the plates. I think there are 3 different actuator designs with different size ball bearings (at least there are for the Jumbo which uses a different clutch case)
Best fix on the 'ordinary' models is to fit the clutch case from the Aprilia with the external arm which gives a much better action and solves the problem. Unfortunately, that wasn't an option on the Jumbo due to the different case design.
The actuator design inside the clutch casing is awful.