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  1. #1
    x2ryder's Avatar
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    Ultra 150/STXR 42cc heads

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ID:	242841I have a nice set of cut oem heads. They have about 1 hour total on them. They are 42cc and make 145psi on a stock motor. Also includes head gaskets. $175.00
    Last edited by x2ryder; 06-21-2011 at 08:36 AM.


  2. #2
    x2ryder's Avatar
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    Pics added

  3. #3
    x2ryder's Avatar
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    These heads were done by Tim at Z Force Racing.

  4. #4
    thetolleyman's Avatar
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    Sorry for this noob question but... what will the increase in psi do for a stock ski? What is the stock psi on an Ultra 150?

  5. #5
    x2ryder's Avatar
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    Yes this will increase stock compression from 125-30psi to 140-45 psi. Gives more lowend midrange punch. Have to use 92-93 octane fuel.

  6. #6
    x2ryder's Avatar
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    Can't believe these are not gone!!!!

  7. #7
    x2ryder's Avatar
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    OBO!!!!!

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