hello ive bought a yamaha rt3 to restore im no mechanic but ive messed with bikes in the past striped it down to the frame and started stripping the engine .when ive took of the clutch cover of ive noticed loads of bits in the botom of it ,i assumed metal some part chewed up i thought then i found a small rock in there about 20mm square and then more smaller ones about 5mm to 10mm behind were the gearstick comes through cant see how they got in there no holes in casing any one got any ideas ill put some pics on later if anyone interested might be something obvious wen i take the clutch of thanks

Gosh, Welcome, but sounds like you have a few issues to sort. Pics of the offending parts would be great when you can. Sounds like possibly to do with the kick start gears & possibly the bearing in the case behind the kick intermediate gear--idler gear call it. Then again if by 'rocks' you 'mean' rocks, small stones, i wonder if its been sabotaged by putting stuff in the oil filler hole. Hope not. Gonna be interesting. Goodnight from NZ down under. Well, 1.50AM damn it, this site is too addictive haha. Lucky i'm retired. Cut my teeth on these old girls back in the day working in the local Yamy shop. Still learning though.

hello thanks for your reply here are the pics one with 10mm spanner showing size of bigest stone dosent seem to be any damage done as i can see

heres some with the clutch of still cant see how they got in there i put the big stone back i place to show were it was definatly gona be more pics and other questions gona try snd get those cogs out and split the cases next and ive not got a clue thanks

Wow.

First, welcome!

Second, HOLY ROCKS batman! I have no idea why or how those rocks got in there, I've never seen anything like that.

Splitting cases is not that difficult, but can be intimidating the first time. Look in the Tech Section here for factory service manual, and various threads about rebuilds. Good luck, and keep us posted!

As Fred Flintstone would say that looks like Barney Rubble.
Amazing! Good luck with the restoration.

Pretty obvious now how they got in there....confirms my original thought...sabotage in through the oil fill hole.

Wow. I wonder--previous owner went to lunch halfway through an oil change. Child come along, sees a hole & tips all his rocks out of the fish tank in there. Owner comes out unaware & pours oil in then carries on riding. Be good if you could confidently wash it out without having to dismantle any further.

hello thanks for all the replies and welcoming me to the forum i think the same either sabotage or just some kid playin the bike was imported from the usa to the uk and must have been stored outside it is covered in rust my next question is how much more do i need to take of before attempting to split the cases thanks

One thing is the counter shaft sprocket needs to come off.