Differences in cylinders
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Thread: Differences in cylinders

  1. #1
    Senior Member elime's Avatar
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    Differences in cylinders

    I bought 2 cylinders for future use and was looking at them today. I noticed one, I think the one advertised for an XT200, has an air passage or vent between the cam chain and the cylinder. The other, and I have no recollection what is was advertised for, doesn't have that airway. The cylinders are basically the same in all other respect that I can see (so far) and I am positive both will work on the TW engine.

    If anyone has knowledge of this, the pros and cons, please enlighten me.

    PB100033a.jpg
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    Senior Member TW-Brian's Avatar
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    Tony,

    I can't help you with this except to say that the two 1987 TW200, one 1992 XT225, one 199? TW200, one 2000 TTR225, one 2005 TW200, and one 2007 TW200 engines that I have do not have this air gap.

    Brian
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  3. #3
    Senior Member elime's Avatar
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    Brian -- I looked at my ebay purchase history and it was advertised as an" '82 '83 XT200 cylinder." 20 bucks including shipping so no big investment. I am real sure it will work on the TW. I only wonder if it can be honed to 70mm.

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    Last edited by elime; 05-20-2017 at 01:13 PM.
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    Senior Member TW-Brian's Avatar
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    Quote Originally Posted by elime View Post
    Brian -- I looked at my ebay purchase history and it was advertised as an" '82 '83 XT200 cylinder." 20 bucks including shipping so no big investment. I am real sure it will work on the TW. I only wonder if it can be honed to 70mm.

    HoleCleaned.jpg
    This cylinder should make one of your bikes even faster - better cooling, less weight, less air resistance. We look forward to your new TW land speed record !
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  6. #5
    Senior Member elime's Avatar
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    I am almost ready to put my parts bike with the 70mm Wiseco and MegaCycle camshaft and 14/50 sprockets and 5 speed transmission up against a TW225 with a 6 speed. Almost ready -- a little more carb tuning necessary,
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  7. #6
    Senior Member christddel's Avatar
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    Quote Originally Posted by elime View Post
    Brian -- I looked at my ebay purchase history and it was advertised as an" '82 '83 XT200 cylinder." 20 bucks including shipping so no big investment. I am real sure it will work on the TW. I only wonder if it can be honed to 70mm
    Hello,
    Sorry for my translation...
    I have not yet seen this form of cylinder, It is a special edition, I know just these ...!
    20170521_211005.jpg

    Yes the cylinder of 200 XT TW; can Rebuilding cylinder (Boring) to Max 70mm

    Joint embase & alésage carter.jpg
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  8. #7
    Senior Member elime's Avatar
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    Quote Originally Posted by christddel View Post
    Hello,

    I have not yet seen this form of cylinder, It is a special edition, I know just these ...!


    Yes the cylinder of 200 XT TW; can Rebuilding cylinder (Boring) to Max 70mm
    Just for the fun of it I did an ebay search for "XT200 cylinder" and several cylinders with the air vent showed up -- all were 1982 or 1983.

    Thanks for the info on boring to 70mm. I hope there is enough metal by the vent so it doesn't break.
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  9. #8
    Senior Member christddel's Avatar
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    Quote Originally Posted by elime View Post
    Just for the fun of it I did an ebay search for "XT200 cylinder" and several cylinders with the air vent showed up -- all were 1982 or 1983.
    Exactly, I have seen this too, it would be a limited series in the year 1982/83 ?


    Quote Originally Posted by elime View Post
    Thanks for the info on boring to 70mm. I hope there is enough metal by the vent so it doesn't break.
    Hello,
    The boring centering must be perfect, as it will remain +/- 1.5 mm thickness sleeve...

    I did a bore test on a cylinder block of the TW125.
    Boring to place the sleeve;
    Of the SR185 ---> OK
    Of TW200 ----> OK
    Of XT225 ----> KO, Not good ...! .. there are holes

    DVC00793.JPG
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