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Thread: 81 R pipe

  1. #1
    Join Date
    Feb 2024
    Location
    MN
    --
    6

    81 R pipe

    Is anyone familiar with a SS headers pipe for a 1st gen 250R

  2. #2
    Join Date
    Feb 2024
    Location
    MN
    --
    6
    Quote Originally Posted by 81300R View Post
    Is anyone familiar with a SS headers pipe for a 1st gen 250R
    Few pics of bike. In search of the proper silencer. As well as a hi flite seat, baja light/or number plate, and front brake.







  3. #3
    Join Date
    Feb 2024
    Location
    MN
    --
    6
    This ad shows the same tag that is on the mounting tab of the pipe.


  4. #4
    Join Date
    Feb 2024
    Location
    MN
    --
    6
    Ive got this running now, supposedly had a new piston not long ago.

    Problem is it doesnt rev up. It sounds like a rev limiter, no excessive smoke. At first i thought it was that blue magnum carb, but i swapped a pwk 38 on and same issue.

    Either a cdi issue or wrong piston? I could make out the number 707650 through the plug hole.

    What are the piston options for the 300 nowadays?

  5. #5
    Join Date
    Feb 2024
    Location
    MN
    --
    6
    I am also looking for original 300 piston dimensions, and the lower flange thickness of the 300 cylinder, so i can tell if it has been machined or not, if anyone has those.

  6. #6
    Join Date
    Feb 2024
    Location
    MN
    --
    6
    Ok, looks like the last guy tried to use a 76.5mm wiseco polaris atv piston. It comes up way short of TDC.

    If anyone has original pistons specs it would be extremely helpful.

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