hughes,i only rode the bike to test drive it when i bought it,then rode it down my street on black top.i rode it before the flywheel weight and after and didnt notice a difference or any power loss and going slow across my lawn the motor seemed to keep its momentum better(i can see the weight will be very beneficial in some of the tight woods).i have not had the chance to actually woods ride with it yet but cannot wait,im hoping i can make it trailable.i dont expect myself to whip it around berms like a 250 but i think the power will make up for any flaws the bike has,i am not a track racer anyways so i dont need the best and latest handling and suspension out on the market.i do wish i would have been able to drive it in the woods before and after the weight but oh well i probably just would have liked it better after the weight was installed.