Moving Kick Start Lever in 1st Gear

Hello, I've read stories about the kickstart moving indicating a lay shaft bearing due to fail. All bearings were replaced with the recomended 10k miles ago. (Roller)

My kickstart lever has started moving when I take off in 1 st gear, not much but enough that I can feel it move back to its rest position when I change to 2nd.
It doesn't do it in any other gear, just First.

I replaced the bushes in the kickstart shaft and 1st gear bush because it was jumping out of 1st gear.
I shimmed the slack (end float in the kick start shaft) possibly a little tight but now there in a couple of thou end float and it doesn't jump out of gear any more.
It didn't move the kick start lever for the first couple of hundred ks, but does now.

When I changed the bushes I felt the other bearings and all seemed ok at the time.

Impending skid marks, broken shrubery, torn leather, blood, wailing women?

graeme (MK3)

Definately strip the box down and have a look inside as if the layshaft fails it could be an expensive and possibly painfull experience.
Freddy.

Could be sticktion in the lay-shaft bush.
Cash

Have you checked the gearbox mounts, it could be the whole gearbox is moving (I speak from experience).

Gear box is tight

Layshaft shimming too tight?

If the bearing is about the fail, does the kickstart lever move in all gears or just 1st?
The shimming was a little tight, but seems ok now.

GRM 450 said:

If the bearing is about the fail, does the kickstart lever move in all gears or just 1st?
The shimming was a little tight, but seems ok now.

Click to expand...

It will bounce back n forth in all gears, less so in 4th and worse under load.

Mick

Thanks, so I'm assuming it's a tight kickstart shaft bush. I hope?
It doesn't move in any gear except 1st and not much, but I can feel it move back to its rest position when I change to 2nd.

Graeme

Mine was doing exactly the same thing, I was trying to fix it by looking at the layshaft bearing, bushes, kickstart shaft etc. In the end I pulled the whole thing out and realised the inner case was buggered. The mainshaft hole was slogged out by the sleevegear bearing spinning in there. It was quite bad. Purchased new inner gearbox shell (not cheap!) and replaced the sleevegear bushes, and has been all good since. I'm no engineer, so why exaclty this problem would cause the kickstart lever to pull down under load I don't really know, but I guess my mainshaft had so much movement it must have been putting unusual pressure ont the layshaft.

It took me a year and a half to figure this sucker out! Happy to be riding again now!

Good luck,
L

Thanks, mine only started doing it after I changed the kick start bush and I think I shimmed it too tight. It doesn't do it when the box is warm and only in 1st gear. If it starts to get worse I'll strip the box and look closely at all bearings and the housings. Graeme