i just ordered a 426 kit for my EX, its a Wiseco 11:1 piston, hot cam stage 2, bigger valves, port and polish, and some major carb improvements, just wondering if their is anything else i can do to get a little more power from my EX, and how you guys with the 426 kit like yours...and im wanting to upgrade from my Pro-Circuit exhaust, and could you guys help me out a little on which pipe you think would be best...

 

pro circuit is good so is big gun and white bros. in the pipe shootout in some magazine i forget which one white bros e series and big gun produced the most hp gains make sure u get the complete system to help with the mods u are getting

 

Let me know how you like the 426 Ive been thinking I need a little more power.

 

Go with a Sparks racing pipe. My little brother had a big gun pipe on his 400ex with 39 lectron port & polish and a stage 3 race cam. Then when he had to rebiuld he went with a 416 and still had the big gun. It was slipping his clutch just a little. Then he decided to get a sparks pipe and the power increase was enough that he had to replace his clutch. He was alwys happy with the big gun but didn't realize how much power he was loosing. I would definiteley get the sparks.

 

When you go to the 88mm piston it will start to build heat. It won't be necessary but, I recommend a better/ bigger oil tank.