Tune it down - and take it slow
I just had an unfortunate experience with a fairly new rider that usually rides a YZ 125. He is somewhat new to woods, and was interested in buying my KDX200, because his 125 needed a top end. I let him borrow it while I rode on my other bike - a woods friendly YZ250. My KDX rips, and he was definately impressed with the power. Unfortunatly, he looped it out and landed very awkward in a water break ditch. Broke his Tibia plateau and tore two ligaments in his knee. Decent rider, but he grabbed a handful of the KDX200 throttle and it was not pretty. No damage to the bike though. He said that his stock YZ125 doesn't pull that strong. Oh - fyi - my '92 KDX has Boyeen Reeds, FMF Fatty & Turbine Core pipes, air box mod, perfect jetting, Wiseco Top end, 38kg front springs, and new 13/49 gearing. Not a brute like my YZ250, but it can still get you in trouble in a hurry. Moral of the story - is that - a tuned down KDX is much more ridable for the beginner than the well modified version. Anyone need a 200?