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swaping sj750 engine for xv750 enging

Discussion in 'XJ Technical Chat' started by snider, Aug 25, 2009.

  1. snider

    snider New Member

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    Hey I just got my first bike but the engine is running at about 187479 mile and was thinking of swaping or rebuilding. has anyone ever swapped it with the xv750 and how hard was it.
     
    snider, Aug 25, 2009
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  2. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    Welcome to the site !!

    The driveshaft must be aligned exactly the same, within 1/4 inch I guess.
    Since the same engineering team designed both bikes at the same time, the rear mount just MIGHT be the same, or in the same plane at least.

    But why use THAT motor? it is known for starter issues, and has less HP.
    It has to fit the top of the frame too, and front mounts would be needed.

    And who puts THAT many miles on a bike in Canada?
    You sure the "9" isn't "tenths" ??
     
    TIMEtoRIDE, Aug 25, 2009
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  3. mcrwt644

    mcrwt644 Member

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    The frames ARE different. You don't want to go with this engine, the starter issues are really bad, and Yamaha was notorious for it. I had a 94 xv535 I picked up off of CL with 6k miles on it for $250 and it had the starter issue. It's the ugliest sound you will ever hear, next to a total engine failure.
     
    mcrwt644, Aug 25, 2009
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  4. Hillsy

    Hillsy Member

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    Short answer is no one has done it because it's too much work to get an inferior motor.

    Look for another XJ lump - they're out there.
     
    Hillsy, Aug 25, 2009
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  5. RickCoMatic

    RickCoMatic Well-Known Member

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    The Virago Engine would also require an Intake Plenum to be fabricated to match-up to the opposed Carb Intakes with an opening to atmosphere and a Filter arrangement.
    This would cause the Fuel Tank to not fit ...
    Then you have forward and upper mounts to deal with ...

    Then ... the cutting and welding starts.
     
    RickCoMatic, Aug 25, 2009
    #5

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