engine mod info?????

[EXDUNER127]

Can you jus tput in a performance cam/ or jus t a bigger piston in a 400ex and notice a difference, or should I wait till I have enough money to do both...

[JD400exrider]

I would wait to do both and possibly more at the same time. One complimenmts the other for more power. I am getting ready to do a 416 kit also. I have the cam, cam chain, gaskets, heavy duty clutch springs.
I am waiting to get enough money to port polish, new valve springs, three angle valve job with new intake valves and possibly a carb or some carb boring on the stocker. I don't think all the people on here do the cam chain or port and polish and valve springs with drop in cams. I just want as much reliablity as possible. Good Luck with your project.

[Steve-o 400EX]

I agree, ya gotta do it all at once. You wont see the gains if ya dont and you risk wearing out other parts. Also it will keep ya from tearin down ur motor 5 times.

[RED121572]

Heres my 2cts,

Everytime you open your motor up, your costing yourself an oil change and gaskets. Too save some cash in the long run, consider installing the piston and cam at the sametime.

Good luck!!:D