hey all

from others experience is it the yamalube oil pumps that tick loudly at idle.

it almost sounds like a cracked hydraulic lifter in a car?

or is that bad rod bearings?

I can post a video, but if others find the oil pumps noisy then I wont worry

could it be wear in the bore/piston? often called 'Piston Slap'

oil pumps are silent running

Doesn't sound totally like slap to me.

Could be rod knock then.

Ill post a video.

Neither of my RD's pumps are noisy, the only thing I can think of is when its on its back stroke its closing fast and making a noise but there is generally a brass shim in there which would help too keep things quiet.

tell you what...if you can hear the pump noise you have a remarkably quiet engine/exhaust

Hahaha it's certainly not quiet. Ill take a video.

Maybe ill just rbuld the lot. Gearbox bearings are shot so ill have to strip it down and rebuild the whole thing.

Will try to avoid rebuilding the crank although crank kits are only another 100. Maybe I should just suck it up and do the lot. I do like the bike so far. But clutch is still slipping despite sanding the plates but its still fun! I think with a chamber and bigger reed intake it will rip