Today I was at the pits and I saw a guy on a 400ex and i asked him if it was worth it to sell my mojave for a 400ex but he said my mojave would climb the hills that i currently cant(lack of power)with a modded 250 dirtbike motor any ideas ?????????????/what should i do?

 

Not really up on racing but the dirt bike engine doesn't have a balancer so vibration is a major concern. Also for the 400ex there is 450 big bore kit that will have it running with a raptor660 stock with minor mods. Check it out good luck.