Is it true that with a hot cam (either stage) its harder to start? If so how much harder?

 

Not one bit. I've never heard that before. You might have gotten that mixed up with a high rev CDI box, which, in some cases makes the quad almost impossible to start when the temps start dropping.

 

so you would recomend the hot cam? What stage for drag racing sand and asphault. And thanks for your reply about this and the Rev box

 

I dont know anything about a "hot cam," but i can tell you that the XR400 WebCam I put in (450/451 grind), along with my other mods below, turned my EX into a drag speed king. Sand, pavement, dirt drags i could take 426's, 430's, 440's, DS650s, Raptors, 250's....at least until the very top of 5th on the fastest quads (DS650 and Raptors).

Instead of a Rev box, get a timing advance key and a 16T sprocket.

 

No loss of anything with a high-compression piston...as he has:416cc.

 

MIA is right, their is no bottom end loss with the STG 2 (with comp and cc's) MIA we used to used to use the Big web cam, but can make the same power with the Hotcam stg 2 (it's a little easier on valve train and a little more bottom)
Dynoray

 

Cool. Who makes it?

I had yet to find a heavily modded 400EX that could stay with me in drags. Think I got really lucky with the combination I had. But oh well, I sold that beast, and now im going thru withdrawls waiting for the 'R!

 

my bike has a xr 400 cam? should i still make a switch?

 

Do you mean a stk XR400 cam or a Web XR/EX cam?
If it's a stk XR cam then by all means, change it.

 

I think it is stock. So what kind of rwhp are we talking if I add the Stage 2 hot cam and a Advance Timing Key?