wondering about big bore sleeve

86 xr6r. i would like to go to 100mm piston.my ? is, do the big bore cylinders (L.A. sleeve) have a larger o.d. than stock? i e-mailed l.a. and they said their kit has one bore, 100mm. IF that is the limit on their sleeve it must be the same size as stock therefore i would not change cylinders. has anyone dealt with this. thanks. tim

you can rebore the standard bore for the wiseco or JE:100mm (630 kit) BUT YOU DONT have much meat left in the bore.

your best to get a 630 sleeve pressed in then you get 2 rebores.

ballards.jpg

ballards1.jpg

thanks for the info. that is exactly what i was looking for. what are the pages you have on your post out of? i can't see it well enough to tell. thanks again. tim

try looking again i changed image hosting sites :thumbsup:

jeoff ballard's catalouge the guru of XR's here in australia.

http://www.ballards.cc/

thanks veetwo. much better. i noticed ballards has their listing for 1988-on. all the places i look at here say that as well, i wonder why. mine is an 86. i do not have that nikasil coating on the cylinder. tim

i presume you can still resleeve yours.

best bet to do is ring who ever does the kits over your side of the pond & explain what your after. info etc.

by the way if you go 630 use high octain fuel OR run 2 base gaskets to lower compression so you can run normal pump fuel.

hi veetwo. the engine is still stock. i e-mailed L.A. sleeve and they say their sleeve for big bore is 100mm and can not be bored anymore, the one in your post w/ballards looks like it can be bored twice. do you know who makes that cylinder? the L.A. guys think my cylinder has nikasil, but it does not. thanks tim.

hi veetwo. the engine is still stock. i e-mailed L.A. sleeve and they say their sleeve for big bore is 100mm and can not be bored anymore, the one in your post w/ballards looks like it can be bored twice. do you know who makes that cylinder? the L.A. guys think my cylinder has nikasil, but it does not. thanks tim.

i just spoke to ballards there gear is from USA through wiseco/JE (sleeves & pistons) there bore bores out to 630 max.

click on the first link of the 2 & look in the section above what i underlined (whats under lined was for my use at the time) section above XR600 (twin carb) 85-87 etc

hope this helps happy modding

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