Post by colin4255 on Jun 8, 2011 13:07:10 GMT
Now I have a re-built engine, new cush drive (complete with layshaft and gears), new cruciform, main individual gears shimmed correctly, new clutch (re-built with new springs, new spring cups, new cork plates (soaked overnight in oil first)) , new clutch plunger arm, new brass plunger - new everything clutch related in fact.
The damm things lurches quite violently when setting off no matter how slowly you let out the lever. It reaches a point where it just goes from being in to being out, so to speak.
I should say the clutch is properly adjusted. About 1/8inch or 3mm play at lever. With clucth held fully home you can move kickstart slowly downwards and there is no movement in flyhwheel, and the 'slack' in the lutch actuation arm has been properly taken up on the cable. And yes, the clutch is not overly adjusted either. Cable inner is fine and not sticking at all.
The rear hub is also OK from what I can see, no play anywhere and the backplate is tight and properly fastened on. I just cannot think what can be causing this, the usual suspect things have all bee replaced.
Its less of an issue when its done 20 or 30 miles and warmed up, but is still there. Much worse when cold.
Now I have been told that while the clutch basket and associated bits with six springs and cups appear to be set centrally, this is not entirely the case and there are some holes I need to line up in the basket and back plate with the gear on it? Failing to do this will mean the clutch springs tip slightly and this is what causes the lurching?? Not sure if any of you have heard this, but this issue has me beaten. BTW this is not a COSA clutch, but an earlier 21tooth 6 spring non cosa clutch. Scooter is a PX125.
Anyone got any ideas of things to look at that I have not yet tried??
Thanks
The damm things lurches quite violently when setting off no matter how slowly you let out the lever. It reaches a point where it just goes from being in to being out, so to speak.
I should say the clutch is properly adjusted. About 1/8inch or 3mm play at lever. With clucth held fully home you can move kickstart slowly downwards and there is no movement in flyhwheel, and the 'slack' in the lutch actuation arm has been properly taken up on the cable. And yes, the clutch is not overly adjusted either. Cable inner is fine and not sticking at all.
The rear hub is also OK from what I can see, no play anywhere and the backplate is tight and properly fastened on. I just cannot think what can be causing this, the usual suspect things have all bee replaced.
Its less of an issue when its done 20 or 30 miles and warmed up, but is still there. Much worse when cold.
Now I have been told that while the clutch basket and associated bits with six springs and cups appear to be set centrally, this is not entirely the case and there are some holes I need to line up in the basket and back plate with the gear on it? Failing to do this will mean the clutch springs tip slightly and this is what causes the lurching?? Not sure if any of you have heard this, but this issue has me beaten. BTW this is not a COSA clutch, but an earlier 21tooth 6 spring non cosa clutch. Scooter is a PX125.
Anyone got any ideas of things to look at that I have not yet tried??
Thanks
