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timothypg

wondering about big bore sleeve

8 posts in this topic

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

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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

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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

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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

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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.

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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.

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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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