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Front end conversion, now what to do with rear?

Discussion in 'XJ Technical Chat' started by Jacob Wood, May 19, 2019.

  1. Jacob Wood

    Jacob Wood New Member

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    I recently converted the front end on my 82 Seca XJ550R to an 81 Suzuki GS750l setup. It was not ideal, but replacement forks were not easy to come by. The donor bike came easy.

    Now I at a crossroads with the ugly Suzuki wheel in front and the OEM Seca wheel in back. Was wondering if anyone could give me some direction in converting the rear wheel setup to disc brake/ugly Suzuki wheel setup.

    Will swing arm convert? Accessories that I may need to make the switch. I know that not many people will appreciate this post considering the nature of the swap, but it was the cheapest easiest way to make sure all the parts matched up at the time..

    Thanks for anyone who reads and replies :)
     
  2. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    You will need a welder, good welding skills, and experience in modifying a motorcycle frame.
    The only direct-swap swingarm is from a Radian, and that uses essentially the same wheel and brake setup as the Seca.
     
  3. Jacob Wood

    Jacob Wood New Member

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    I appreciate the reply @k-moe. Looks like I may just paint the back wheel black to match the paint I put on the Suzuki rim. I love the drum brake, just a wheel that will match the front. Thinking maybe a Yamaha swing arm would have a similar caliper mount that would convert easier. I'm obviously new to this.

    Absolutely killer website. Thanks for helping make it great and easy to use!
     
  4. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    I misread your OP. I was thinking you were using a newer donor bike.
    You might be able to fit the swinger you have from the Suzuki. Take measurements of the overall width at the bearings, the width of each mounting "ear" and the inner diameter of the bearings.
    You'll also need to look at shock mount location, swingarm length, and rear sprocket offset.
     
  5. Jacob Wood

    Jacob Wood New Member

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    Sprocket from the Suzuki is 42 can I just swap it with the 45 that's on the bike now? Also, Suzuki rear wheel is typically 16"-17" will I need to account for that when determining sprocket teeth count?
     
  6. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Teeth count will be the least of your worries if the rear doesn't line up with the front.
     

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