Posted July 2, 201410 yr So, nowadays if you want more performance you go to a shop and get a remapped CDI, powercommander, performance de-cat exhaust etc.. What are the old fashoned style tips to get the most out of an engine in your own garage? Stuff like valve lapping/polishing, Porting and Polishing.... the stuff that doesnt reley on fancy electronics and computer software. Just out of curiousity cos i have an old 125 engine that im looking to put into a go kart - and i know im not going to get 120 mph out it... thanks, Matt
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