what would give me the best power increase on my 300ex. the motor is stock i have a RCM full exhaust system on it and i ride in just about every conditions. Pleas Help!

 

The question isn't how much power do you want, its how much do you want to SPEND!

Your EX can be made to run over a 400ex everywhere, you can just boost your power for trails.

You can get

High Compression piston
Web Cam
CDI Mods

For about 300. Then you will be putting out about 21HP, not much more top end or anything.

Same mods, but boring 2mm making it a true 300

you are at 24 HP

about 350

You can bore 6mm over and get a complete 330 kit for about

980. That was my total without a pipe.

The 330 puts out 35RWHP, Will beat a piped and ported EX in a drag, more than give a 440 a hard time, with a good rider.

You can go for about 1,200 and make it a 352cc stroker. That will be putting in the low 40HP.

I'm unsure of the cost of a 395 kit.

But mainly its just how much you want to spend...

 

Hey Aaron (94DGblaster)
You said you could bore 2mm over to make it a true 300. I'm wondering something. Is that with the stock cylinder/sleeve? What size piston would i buy to do that?
Thanks again
Mike