Engine Mod

[Donjuan400ex]

Okay i found this piston on Ebay. I want to know what all exactly i would need to do to my stocker 400ex to get more power out of it!! please help

http://cgi.ebay.com/ebaymotors/Honda-400EX-99-08-10-1-416-bore-Wiseco-piston_W0QQcmdZViewItemQQ_trksidZp3286Q2ec0Q2em14Q QhashZitem439aca9ab5QQitemZ290359777973QQptZMotors Q5fATVQ5fPartsQ5fAccessories

[killer400ex]

you will need to pull apart the motor obviousley and pull the cylinder off and bring the new piston and jug (cylinder) to a professional machine shop and have it bored and honed for the piston, you will need to buy the gasket kit, i suggest buying either oem or a gasket kit from wiseco, and re assemble the motor, i would suggest buying a stage 2 hot cam for the best power, and your going to have to re-jet, if you want more power i would recommend buying a full exhaust kit, meaning not just a slip on but headers and silencer. make sure that you have the airbox lid removed or atleast a few holes drilled in it to let it breathe better

[Donjuan400ex]

thank you for the advice!!