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  1. #1

    Time for rebuild!

    Hi guys. Need expert help here. Rebuilding top end of an 03 sportster 951 carbed boat. Bores are very worn & going to need to go .040 over. Am I going to need to re-jet? Should be close to 1000 cc's when it's done.

    THANKS!


  2. #2
    Work Harder, Millions on Wellfare Depend On Us! ultramaxracing05's Avatar
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    i got a new in the box piston kit, thats 2nd over, or .50
    no need to rejet when overboring.

    I didnt know there was .40 its either, .25 .50, .75 or 1.00

  3. #3
    If you want to get technical...the engine is spec'd in METRIC. Bore size is now 88.5mm!

    Just lookin at what I had to work with...I figured around .040. Stock pistons are 88mm...and bores were at 88.475...so I was EXTREMELY CLOSE with my eyeballs!

  4. #4
    Work Harder, Millions on Wellfare Depend On Us! ultramaxracing05's Avatar
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    ok well like i said I have a 88.50 just let me know

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