If you guys/girls want a little more power out of your 400 go to your Honda dealer and tell them you want a cam from the XR400. It’s the same motor but the XR comes with a little bigger cam. Honda part # 14000-KCY-670

yup, or you could put in a web cam and get even more

or you could put a 450 in it and get even more.

i keep thinkin that too, i got a 450 sittin right next to the 400ex in the garage, but if only i didnt still have to pay for that motorcycle, lol