i got a pipe and things like that but wat else can i do to mack it a better racer

 

you can put an extended axle on it, and a 400ex front end. i have a durablue +4 axle, and a 400ex front end, including shocks, and a-arms, with a lowering kit built by myself, b/c i use it for flattracking. it makes the handling difference seem like night and day. i would prefer it to anyone with a 250x/300ex. i have many more mods to mine, like a big bore stroker 250r motor, but i won't go into details about that, b/c thats getting into the big $$$$$

 

i am using mi 300 ex for mx and im 14

 

look for a 400 ex carb

 

like i said a 400ex front end will help a ton. 400ex shocks and a-arms with an aftermarket mounting bracket, along with a +4 axle. with that you will have the best handling 300ex there!