Sprocket shaft swap
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  1. #1
    Senior Member flyhunter3825's Avatar
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    Sprocket shaft swap

    I havent found a definative answer, so here goes... ik i gotta swap out the side cover, flywheel, etc, but other than that, can i simply take the TWs sprocket shaft and swap it into a ttr225 motor? Why or why not? Thanks.

  2. #2
    Senior Member Devils Advocate's Avatar
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  3. #3
    Senior Member TW-Brian's Avatar
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    If you want to utilize the 6-speed transmission of the TTR225, the TW output shaft will need to be modified.

    If you didn't want modify the output shaft, then you could just swap an entire 5-speed TW transmission into the TTR225 engine.

    With either of the above options, there is also a bearing in the left side TTR crankcase that needs to be changed to fit the TW output shaft.

    Really pretty simple (but still involves a good bit of work with disassembling and reassembling things).

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  5. #4
    Senior Member flyhunter3825's Avatar
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    Basically i just wanna put the tw shaft in the ttr. What needs to be modified on the tw shaft?

  6. #5
    Senior Member flyhunter3825's Avatar
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    Basically i just wanna put the tw shaft in the ttr. What needs to be modified on the tw shaft?

  7. #6
    Senior Member TW-Brian's Avatar
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    Quote Originally Posted by flyhunter3825 View Post
    Basically i just wanna put the tw shaft in the ttr.
    Sorry Fly, it is not quite that simple.

    Quote Originally Posted by flyhunter3825 View Post
    What needs to be modified on the tw shaft?
    The picture below shows a stock TW output shaft on top. A modified TW output shaft is in the middle showing an additional circlip groove and spacer ring added. A stock TTR225 output shaft is shown on the bottom.

    100_5111.JPG

  8. #7
    Senior Member flyhunter3825's Avatar
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    So thats it? Just a circlip groove? Ive got a lathe at work that can do that no prob.

  9. #8
    Senior Member TW-Brian's Avatar
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    Quote Originally Posted by flyhunter3825 View Post
    So thats it? Just a circlip groove? Ive got a lathe at work that can do that no prob.
    I say go for it Fly!

    (p.s. I am not machinist, but be advised that this shaft is hardened and I have been told this groove cannot be cut and must be ground, but what do I know !)

  10. #9
    Senior Member flyhunter3825's Avatar
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    Lol, i prolly will. So just to clarify, the only thing preventing it from being a direct swap is the groove? Ive got a ttr225 that, if this works, will be a ttr200. The ttr needs a complete tear down anyway, might as well make it useful.

  11. #10
    Senior Member TW-Brian's Avatar
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    Quote Originally Posted by flyhunter3825 View Post
    So just to clarify, the only thing preventing it from being a direct swap is the groove?
    Just to clarify, you will need to add the groove, fabricate and add the spacer ring, and swap the bearing in the left side crankcase.

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