I need more power. I want to dust the Z400. If I was to Port and Polish my head and go with a bigger Cam would this put me around 30 HP. I have Jetted and K&N with T-4 and I Dyno at 24 HP. Or should I go with the 416 stroked? i still want to keep it reliable for trails.

 

i'm runnin my EX, stock bore, with an R-4 pipe, uni filter, no lid, choke removed and a hotcams stage 2. i'm usin a 42 pilot jet and a 158 main. i can smoke z-400's easily with this set up. if you wanna stroke your 416 to 440 i hear thats a real nice set up right there.

 

Get the FCR carb from sparksracing & his aggresive cam. it will wake your bike up. The carb will
actually do more than the carb. But with those two thing, you wouls spank a stock z400. My buddy
did that to his 400ex & it would give a piped raptor a run for it's money

 

I meant to say the FCR carb will actually do more than th CAM. "I caught my mistake". And he doeasn't have any port & head work.