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XJ650RJ TO XJ650LJ TURBO CONVERSION

Discussion in 'XJ Modifications' started by 209SECA, Aug 23, 2008.

  1. 209SECA

    209SECA Member

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    :?: SO IVE SERCHED AND SEARCHED BUT HAVE'NT FOUND MUCH. HOW HARD IS IT TO PUT A THE TURBO SYSTEM FROM A XJ650LJ ONTO A XJ650RJ SECA? DO YOU HAVE TO REPLACE THE CARBS? HEADS? I HAVE A FACTORY SERVICE MANUAL FOR BOTH MODELS ON THE WAY.
     
    209SECA, Aug 23, 2008
    #1
  2. dinoracer

    dinoracer Member

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    First off the xj turbo is the heaviest and most overbuilt xj bottom end of them all. You should not expect the bottom end to live very long from the standard Xj650. The turbo's will build up to 14 lbs of boost very easily. Wonder what that would do to normal connecting rods or cranks? The head is different and the cam timing is different. Carbs are completly different and have there own quirks to them. Your best bet would be to find a seca turbo and put all of your seca bodywork on the frame if that is even possible??? There is a seca turbo on Craigslist in San Diego for a few hundred dollars if you want to go for it. Just expect to clean out the carbs, the fuel pressure regulator and the check valves, Both of them. One on the carbs and the other is on the oil line going into the turbo. Having the turbo rebuilt is another reality but there are places that can do that... Not trying to tell you not to go for it, just the opposite, letting you know the realities of what you might run into. If you do get one running and running very well, make sure to keep her happy and ride her often!!!. Ohh and make her scream... The turbo's like that

    Sean

    Sean
     
    dinoracer, Aug 28, 2008
    #2
  3. 209SECA

    209SECA Member

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    Thank you. Actualy I picked up a complete XJ650LJ today that I found on craigslist. I havent had a chance to really look at it(deminsions) yet. I was woundering If the LJ motor will fit in my RJ frame. Its really in better shape than I expected almost hate to use it as a parts bike but it doesnt have title. I hope to have pics up Next week.
     
    209SECA, Aug 30, 2008
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  4. one2dmax

    one2dmax Member

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    I've use 750 maxim and seca engines in my 650 turbo with a few modifications. It can be done but you would need a lot of parts that would be easier to get a complete parts bike to steal from.

    Sean
     
    one2dmax, Sep 7, 2008
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  5. 209SECA

    209SECA Member

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    Is the crankshaft the same on the 650LJ and 650RJ? I'm almost positive it is but want to double check. Thanks.
     
    209SECA, Sep 20, 2008
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