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Thread: Cylinder Head Question

  1. #21
    Senior Member DrTerrible's Avatar
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    Well he measured it and he thinks it will be at the maximum clearance if he hones it. He said he doesnt know how long it will last though...i told him to go ahead and to it. Ill take my chances
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  2. #22
    Senior Member elime's Avatar
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    Quote Originally Posted by DrTerrible View Post
    Well he measured it and he thinks it will be at the maximum clearance if he hones it. He said he doesnt know how long it will last though...i told him to go ahead and to it. Ill take my chances
    It will last a long long time. You will probably want to up grade to a larger piston long before this one wear out.
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    Long live the internal combustion engine!

  3. #23
    Senior Member DrTerrible's Avatar
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    Thanks elime, appreciate all the input you gave me. I will be doing a ttr230 build during the winter so if i need a little extra "power", i will just take that one. Hoping to have everything buttoned up on this build by june if i dont run into any more snags.
    Last edited by DrTerrible; 05-06-2017 at 02:56 PM.
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  5. #24
    Senior Member cccan's Avatar
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    sorry DR..I am a little late to the party...we could have measured everything at the shop before you spent any money. When you get this thing running bring it by the house
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  6. #25
    Senior Member DrTerrible's Avatar
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    Quote Originally Posted by cccan View Post
    sorry DR..I am a little late to the party...we could have measured everything at the shop before you spent any money. When you get this thing running bring it by the house
    For sure...won't have it together for a bit yet but as soon as she is, we'll go for a rip.
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  7. #26
    Senior Member elime's Avatar
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    Quote Originally Posted by Bruce's View Post
    Generally ,you don't bore any more than you have to ,because if you go too big ,the next time you have to do it you can't and you must replace the cylinder or sleeve it .
    True! But the same cylinder used on the TW is / was used on a lot of other vehicles. Besides the TW200, the BW200, XT200, the YFM200 and the YTM200. Those are the ones I know of and there are probably more.

    Search each of those for a cylinder or jug. For example: BW200 cylinder; BW200 jug. You want to find a cylinder that is dirty and greasy and has rust on the cylinder wall. As long as all the fins are there and the threads in all the screw holes are good you are golden. Elbow grease to clean it up, emery cloth to derust the cylinder wall, then off to the machinist to get it bored. And take your time searching. You should be able to get one for less than $20. I just got one, including shipping, for $13.99. It is ugly but it will clean up beautifully.

    For example: 83 yamaha ytm 200 cylinder needs bored 2040
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    Long live the internal combustion engine!

  8. #27
    Senior Member elime's Avatar
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    DrTerrible -- Have you gotten you TW with the new piston running yet?
    Long live the internal combustion engine!

  9. #28
    Senior Member DrTerrible's Avatar
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    Quote Originally Posted by elime View Post
    DrTerrible -- Have you gotten you TW with the new piston running yet?
    I am picking the motor up this afternoon but my frame won't be back from the painters until after this weekend unfortunately. Will definitely update as soon as I get it together
    elime likes this.

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