Hey, anybody try the new hotcam for the yfz. Anybody try any other cam? I installed the yz450 cam, the power gain was great, it was getting it started that was the problem. Just wondering if people are having luck with the hotcam?
On another note. Found out that the yfz exhaust cam, has a different part # then the wr450 or the yz450. SO, who's to say that the lift and duration is not different???? They where not suppose to be, infact, everyone say that its the wr450 cam thats in the yfz. ITS NOT THOUGH, and Im wondering if that why I have such a hard time getting mine to crank to life. I'm currently taking the yz450 cam out, so that I dont burn up my starter motor. I'll try the cam mod, by retarding the tooth one, and if that doesnt work (wont start still) then I am on to the hotcam. Bike starts fine with the original cam in it!! maybe I should just leave well enough alone.........

 

There's lots of folks running the YZ ex cam w/o issue. I'd recheck your install.

 

Yeah, I actually had yamaha do the install on it, and I am currently having them take it back apart right now. We'll see I guess, I am really wondering why I am having such a problem. Its only cold starts, it really backfires bad, and takes about 10-15 minutes to get it to run. .......about 75-100 turnovers. Pretty crazy!! But after youget it started it rus absolutely perfect. I dont know what is wrong?

 

Jetting probly.