my son has a 300ex he want to put 400ex plastics on it can that be done with out a prob???

 

the stock 400 ex plastic may have to be shortened but i dont think that it will fit on w/o a problem.

 

it will be a problem b/c u have to rewire the lights. and the 400 has side panels and the 300 does not. plus the 300 has a bigger gas tank. it might work im not really sure but i do think it will be a problem to change. just my opinion.