Im new to the forum but i am a avid TTR fan since i got mine. Sad thing though its been a sitting duck for 6 months now as im looking for cam shaft caps and these are impossible to find. I have a 95 TTR 250 Raid and no parts catalogue that i found has them. Any leads would be much appreciated. Hope 2 enjoy my Raid soon again.
Unfortunately you can not buy the cam caps separately. They are machined to suit the head they are fitted to. The only solution I know of is to find a good machine shop, preferably with an interest in bike engines so they know what is necessary. It should be possible to make some thin bushes then bore out the camshaft holes to suit. BUT it is a job that needs to be done by someone with skill and enthusiasm or you might end up with a ruined head altogether.
An alternative is to build up the damaged cap and lower bearing surface with aluminium weld, then line-bore back to the original dimension, but this needs a good machinist AND a good welder!!
Thanks for the response. If i where to opt to change the piston head completely, i guess i will have to find a head for the year Model or where there no changes over the years? As my Bike is in Egypt i have to say i havent seen a mechanic yet who could machine me the cap.
