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New motor or big bore kit?
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Posted by: guenther

Now that we've had the '07 90cc for a little over a month, my son wants more power. Has to be semi-auto and would like to keep electric start if possible. Should I build up the 90 with the 110 kit or find someone with a good used 125.

Posted by: Hanksdad

If it were me, I would definitly replace with a larger new unit. Depending on age may consider larger than 125. However, the better, larger bore, engines usually require manual clutch. Might consider checking out AHP minis or Killer they both sell some quality four stroke honda style replacement motor. I believe Ride1Rob had a post on here one time that he was much happier with the power he got out of an aftermarket motor than the one he had modded. For the money might as well that way you can sell your 90cc. JMHO