Need Help Trying to beef up my gx390

[detroit0909]

Whats up mini bike I just brought GX390 ae2 motor I need advice on how to beef it out so I could get 20hp or more out of it. I have billet flywheel, big bore and lectron 34mm carb. Im trying to figure out what else I need. Any info would be appreciated.

 

[125ccCrazy]

I have a new set of heavy springs and 5/16 pushrods....

 

[stephensimmons]

Whats up mini bike I just brought GX390 ae2 motor I need advice on how to beef it out so I could get 20hp or more out of it. I have billet flywheel, big bore and lectron 34mm carb. Im trying to figure out what else I need. Any info would be appreciated.

Roller rockers, welded up them Ported head, custom grind cam, billet rod