stock 400

[400exrules]

Is it ok to put oh say a DMC alien full system on a stock 400ex? because ive heard not unless you have done alot of work in the engine. And by the way wut is the DB's of the DMC alien

[Ex_Rider43]

you can put it it will give some hp but not as much as a modded motor.but an exaust and a filter is a good start.after that you can look for a carb and some motorwork.

[mopar 400]

If you want to stay with the stock engine bore and want just to help it, I would sugest just buying a slip on and saving some $. It is not much help to run a full exhaust with the stock bore.

[eldoexrider01]

i wish ida bought a full pipe cuz now im lookin at more motor mods. they arnt too loud u can buy spark arrestors for em too.