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  1. #1

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    How To Remove '05 FXHO MR-1 Drive Coupler

    How are you guys removing the drive coupler with the crank still in the engine? Engine is completely together sitting on my work bench, and I need to get the drive coupler off so that I can put on another one. On the 2-strokes you could put some nylon rope down in one of the spark plug holes to keep the piston from traveling any further upwards. Not sure if you can do that in the 4-strokes or not, could damage the valves?


  2. #2
    Hurricane1000's Avatar
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    I use the Yamaha Oem coupler tool...
    Made just for that!

    Good luck.

  3. #3

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    I've used the rope trick on Kawasaki 4-stroke motors without a problem. Think about it... when the piston is at the top of the stroke, all valves are seated, so it shouldn't bend any valves.

    BTW - I have the Kawi tool, but it never seems to work. I usually end up breaking the pulse rotor that the tool attaches to.

  4. #4
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by grumpy_steven View Post
    I've used the rope trick on Kawasaki 4-stroke motors without a problem. Think about it... when the piston is at the top of the stroke, all valves are seated ...
    That is true for the TDC beginning of the power stroke.

    Is it also true for TDC on the exhaust/intake overlap stroke?

  5. #5

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    Quote Originally Posted by K447 View Post
    That is true for the TDC beginning of the power stroke.

    Is it also true for TDC on the exhaust/intake overlap stroke?
    Yeah, Iím not sure if the valves are open or not. Thatís exactly what Iím afraid of.

  6. #6

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    Quote Originally Posted by Hurricane1000 View Post
    I use the Yamaha Oem coupler tool...
    Made just for that!

    Good luck.
    Iím not familiar with that tool. How does it hold the crank still?

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