I am thinking about buying cams soon and in a month i'll be adding a high compression piston when i get more money. I was going to buy stage 2 cams but if i put them in with the stock piston will i loose all my bottom. Or should i get stage 1 and live with it?

 

ahh just sell the ex n just ride the ol lt, either way ur still behind [img]i/expressions/face-icon-small-wink.gif[/img], this way you won't b in debt

 

A stage 2 wont lose any bottom end, my bro has one with stock piston and the torque increase was incredible!

 

I just put in a 10.8:1 stock bore JE piston and a stage 2 Hotcam. I won't get to ride it until Saturday, but just listening to it run, it sounds mean.... I'll give a full report after I've taken it for a spin.

 

dont be either. go with a white brothers. i have built many many EXs and the white brothers cams are far superior to the HotCams.

 

Okay, here's all the specs for the different brands of 400EX cams. I got this off of exriders.com. You can compare all the brands.

400EX CAMS
BRAND & MODEL IN.LIFT EX.LIFT IN@.050” EX@.050” NOTES
STOCK 400EX .316 .302 234 238 OEM
XR400 .326 .321 240 244 BIKE SR
WB ALL AROUND .345 .335 240 248 SR
HOT CAMS STAGE 1 .354 .354 244 244 SR
WEB CAMS 479 .378 .378 250 250 HR,VS,VG
HOT CAMS STAGE 2 .346 .346 254 254 SR
HRC .350 .339 254 256 HOP-UP
GT THUNDER* .350 .345 256 256 SR
WB TRACK* .350 .345 256 256 SR
WEB 450/451* .350 .345 256 256 HR
WEB CAMS463/9i .385 .370 272 270 HR,VS,VG
(In order from shortest duration to longest)
SR=Stock Rockers, Valve Springs & Guides OK
HR=Hard Faced Rockers Recommended
VS=Stiffer Valve Springs Required
VG=Shortened Valve Guides Required
*SAME GRIND

 

chad400ex plz do let us know how it runs. I am doing the same mods exept i'll be using different gaskets so the compression will be bumped up to 11.2:1.

 

Okay....after the test run, this thing is awesome!!! It pulls so much harder than ever before. I never went past 3/4 throttle (still breaking it in), but I didn't need to....it just flat out hauled butt. I didn't notice any loss in bottom end power. I am running 14/38 gearing. It feels like a completely different machine.

 

chad400ex, did you do the install yourself?

 

Nope...a buddy of mine has a connection with Powroll, so one of their guys did it for me for a very good price. Just make sure to get your cylinder honed. You can't just "drop" a piston in, even if it is the same size as the stock piston.