Yeah, that's what I thought! Just waiting on a replacement now that's taking a suspiciously long time...glad I paid by Paypal as I suspect I've been scammed...

I'll have a look at that...thanks for the replies chaps.

The bottom yoke on my trackbike just snapped though so sadly that is taking up my tinkering time...

No idea when the powervalve was decoked; I've only just bought the bike and am steadily working through fixing it's various problems.

It's not like a pinking type sound or a light rattle...quite a heavy knocking but as I say, only when labouring the engine so not usually a problem. It may just be ...

I've noticed a bit of knocking that I can hear as well as feel that only comes on when applying power at low revs, as in so low the engine is almost labouring. At higher engine speeds it's fine.

I figured 3 possibilities, balance shaft wear, big end bearings or piston slap, but I've never ...

Ah...you must be CRM250.

It says to use [img] tags but it doesn't seem to have worked unless it's just not showing on my computer?

...bit of an impulse purchase...

http://i32.photobucket.com/albums/d9/T0 ... 135555.jpg

Rode it home ok now having trouble starting it so I'll put up a post in the relevant section...

EDIT: Pic doesn't seem to be working...any ideas?