YTM200 piston ?
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Thread: YTM200 piston ?

  1. #1
    Senior Member ronnydog's Avatar
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    Quote Originally Posted by Kwizard
    Howdy Y'all,

    Can anyone confirm or deny that a Wiseco YTM200 high compression piston will fit the TW200 cylinder?

    I appreciate ya



    The midget fortune-teller who escaped from prison was a small medium at large.




    The YTM 225 piston fits the TW crank and the TTR225 cylinder. Not sure of the YTM200?



    Ronnydog

  2. #2
    Senior Member macbig2k1's Avatar
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    I can confirm, it will fit.

  3. #3
    Senior Member tw200sgp's Avatar
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    Quote Originally Posted by macbig2k1 View Post
    I can confirm, it will fit.




    Can the stock TW200 barrel be bored out to 71mm?

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  5. #4
    Member RingSteel's Avatar
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    "High compression piston". This is an interesting thought. Does anyone know if there is a down-side to installing a higher compression piston in the TW200?

  6. #5
    Senior Member macbig2k1's Avatar
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    Quote Originally Posted by tw200sgp View Post
    Can the stock TW200 barrel be bored out to 71mm?
    The biggest possible size is 70mm for the original 200 cylinder.

    You have to install a bigger sleeve, if you want 70.5 (or bigger) piston.

    The biggest possible size is the 73mm piston from Wössner piston. These pistons should be also available in the US.

    -> You can contact me, if you can not find a US-reseller/dealer for Wössner.

  7. #6
    Senior Member macbig2k1's Avatar
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    Quote Originally Posted by RingSteel View Post
    "High compression piston". This is an interesting thought. Does anyone know if there is a down-side to installing a higher compression piston in the TW200?
    Please use the service manual. Everything is written into it.

    It doesn't matter which piston do you use (original or high compr.), the procedure is always the same.

  8. #7
    Senior Member PalmStateCrawler's Avatar
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    What kinda cc's would it be with a 73mm bore? Just curious...
    '13 690 Enduro R too many frickin farkles...
    '07 KLX250 farkled (wife's bike)
    '86 BW80 farkled to size
    '10 TW200 you will be missed

  9. #8
    Senior Member macbig2k1's Avatar
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    233,1 ccm with the 200 ccm crank

    242,8 ccm with the 225 ccm crank

  10. #9
    Senior Member PalmStateCrawler's Avatar
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    How much wear do you have on the cylinder? I know that I could get away with a hone but that's because I only have 3700 miles on my 2010.
    '13 690 Enduro R too many frickin farkles...
    '07 KLX250 farkled (wife's bike)
    '86 BW80 farkled to size
    '10 TW200 you will be missed

  11. #10
    Senior Member PalmStateCrawler's Avatar
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    So I could turn my 200 into a 233cc beasty with a re-sleeve?! Is the mouth of the stock case wide enough to accept a 73mm piston? If so, I may have another winter project? Has anyone done this before? Is this or a 72mm bore the set-up of the european 225's?
    '13 690 Enduro R too many frickin farkles...
    '07 KLX250 farkled (wife's bike)
    '86 BW80 farkled to size
    '10 TW200 you will be missed

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