cam and piston

[fmf400ex03]

im looking into a cam and high compression piston.... i was woundering what the best piston and cam combo would be the best and also how noticeable power will i have and how fast and torqy will it be thanx alot :devil:

[fmf400ex03]

and also what will i need to do this?

[cals400ex]

tell us a little more. i am not sure what your looking for or what your wanting to spend. you could get a je or ross piston for $120 and a hotcam for around $125. this would really wake the bike up. you should be able to take piped z's and kfx's with proper jetting. will this be used for dragging, for woods riding, for a little bit of everything, etc? if you go larger than a 426, then you will need to get a larger sleeve. if you want to run around 11:1 compression or higher you will need to buy race gas and also upgrade your head studs. whatever you do, get a service manual!!

[sparks400]

hey cal would a wiseco hotcam combo take z's kfx etc. i just put the combo in tonight

[fmf400ex03]

i do woods racing in the summer and riding on open lakes in the winter im not really looking into boring yet but possibly in the future dont know i have to see the out come. i like to go fast but thats mostly in the winter, in the spring in summer u need bottom and mid range...my quad does about 67 i would like to do like 72 or even 72-75 but have a really quik bottom end will this do it for me??? can ya help me out or am i way off on what i want to do for this :confused:

[fmf400ex03]

so bassically a little of every thing.just all around quiker than most 400's out....dont really wanna run race fuel or new studs tho..

[cals400ex]

i would get around a 10.5 to 10.8:1 compression ross or je piston. if you want to retain the bottom end power, i would stick to the stage 1 cam. this will give nice gains everywhere, not just bottom end.


sparks400, i would think that combo would take those stock z's and kfx's. i know the compression ratios on the wisecos are a little lower than what is recommended. with proper jetting, i think you will be able to take them. what wiseco piston did you use and what cam did you use?

[Dave400ex]

I just ordered a JE 416 10.8:1 and TC XC Cam this week. I can't wait to get it running.

[RAPTORAZ]

Originally posted by sparks400
hey cal would a wiseco hotcam combo take z's kfx etc. i just put the combo in tonight



My 416 takes piped Z400's with ease. At the last Dyno Challenge I took it to. It made 33RWHP. The piped Z's that same day only made around 28-29RWHP. Best $300 I've ever spent.

Ross 10.8 416cc piston - $125.00
Hotcam Stage 2 - $125.00
Boring and ring fitting - $40.00
Honda gaskets - $25.00
Labor(did myself) - Free...Zip... Zero...Nadda
Smoking piped Z's, and some stock Shee's and Rappy's - Priceless

[Toadz400]

so when get a 416 bore kit, what do you all have to do to the cylinder?

[RAPTORAZ]

Originally posted by Toadz400
so when get a 416 bore kit, what do you all have to do to the cylinder?

The cylinder must be overbored 2mm. And the rings need to fitted to the new bore. It cost me $40.00 for both from a local motorcycle machine shop.