The stock kdx 220 is around 31hp and the 200 is 37hp. Has been for years. The 200 has different porting and a bigger carb hence the extra 6 ponies. I have an fmf woods pipe and silencer, jetted, and gutted airbox and its probably only about 40 maybe 42 hp up from 37stock. This is at the crank not rear wheel. I dont know the actual rwhp only crank.