South West Bikers | Motorcycle Forum

guys i need help on this one :


sice owning my first tzr back 2 years ago my knowlege of 2 strokes went from nothing to good then when i sold the bike i spent a lot of time on sites that cater for 2ts only where i picked up a lo9t of usefull knowlege and has taught me alot of what i know today.

anyways let me exeplain im rebuilding my engine and took my barrel down to my local garage the other week to get the bore messured and he said it was a bit of a funny size he gave me the mesurements and of i went e-mailing wemoto to ask what size pistion i would need 2-3 days later passe and no reply when talking to people they said they usaly get the pistion redone when they have the barrel bored .

so this is what im now thinking if the pistion is ok itself can i get away with jsut replacing rings and bearings and keep using the pistion or will i have to get a new psition ???? any relies welcome cheers of to eat my tea now ummmmmmmmmmmmmmmm

As long as the bore and piston arn't marked up to much it should be fine just to fit a new set of rings

yes bud this is what im onbaout but i mean as long as bore and pistion are in good nick every time say for nxt 4 topend rebuilds can i just do rings etc ??

If you are in any doubt about the bore and piston give me a shout and I will have a look.
I am only over the other side of four elms.

Bondy wrote:If you are in any doubt about the bore and piston give me a shout and I will have a look.
I am only over the other side of four elms.

spot on dude might take u up on that mate did u get my pm earlier

Bondy wrote:If you are in any doubt about the bore and piston give me a shout and I will have a look.
I am only over the other side of four elms.

spot on dude ill take u up on that mate. did u get my pm earlier ???

this is what i love about this forum people willing to help other people

Yeah you can have a nice clean smooth bore but the bore can be oval
and when i honed my 250 bore the other day there is slight wear at the bottom of the piston stroke, Just gotta get me 350 heads back and up it too 350
Merv

cool cheers mervin u might be the dude to ask about this. my bikes the uk tzr 89 model without ypvs but i brought a powervalve servo of a 4dl which is the same as a dtr 125 servo. ive been told that they had the control box built into the servo itself if so does this mean i can rewire it into my loom ?? so it works bud or will i still have to get a control box ?? hoping not as i love that kick up the ass at about 6 thou (ypvs or not i just love it !!!!!)

Sorry dont know about that one mine are all old aircooleds but will put it too michael tomorrow he knows more about the modern stuff, he is the one with a RG in bits at the moment, Failng that try loging into Aleks RD site they seem to know there stuff, http://www.yamaha-rd.com, or http://www.aircooled-rd.com and see if Writebike can help he has been a yam, racer, mechanic, scribe for several years now,I am surprised you have not had a reply from Paul at wemoto he has been very helpful to us
merv

yeah dont get me wrong mate wemoto rocks and i only had some more parts delverd yesterday i use him all the time. spot on shop luv him perhaps i should try mailing him again

Sorry i cant help you with the powervalve question either.
Michael