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  1. #1

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    Possible cause....99 XL1200 Limited piston

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    Just wondering what you all's thoughts are on possible causes for this to happen.


  2. #2
    Mr. Millennium's Avatar
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    Jul 2010
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    to much heat ,causes are not enough fuel or no oil,all stems from the carb,when you repair it make sure to either clean and or rebuild carb,and a must,CHANGE IT TO PREMIX,TAKE THE FACTORY OILER OFF

  3. #3

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    Jun 2011
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    Changed to premix a while back....other 2 cylinders/pistons look nice but this one is bad. Any thoughts on the crank being damaged....not blued from heat, turns freely, bearings and washers seem intact.

    Just replaced the #3 cylinder (sleeved) and piston a couple weeks ago (purchased used from someone)...took it out and ran fine for 3 hours then died.

  4. #4
    Mr. Millennium's Avatar
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    Crank is probley ok,your carb is most likley the problem what psi is your pop off pressure,if you have never had your carbs redone most likley your pop off is to high starving that cyl for gas and by you already gone to premix if it starves it for gas it also starves it for oil

  5. #5

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    Carbs have never been rebuilt.....will need to do so....how would you check/adjust pop off pressure.

  6. #6
    i am going thru the same thing with mine. bought it not running. did a compression test and number 2 cylinder was dead. pulled it apart and the piston looked just like yours. cylinder was scored and my rod is bad where the wrist pin bearing goes. plus the rod bearing is noisey. im guessing the number 2 cylinder went lean because of a clogged carb and the guy kept riding it. for the amount of damage this thing had to be pinging its butt off. i would split the cases and spin the rod on the crank and make sure your rod bearing is good.

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