YFZ Jetting Problems

nick658 · #1 11-13-2008, 10:44 AM

I have a 05 YFZ 450 and it was recently bored out and now I cant get it too idle. It will idle perfectly with the choke all the way out. But when the choke goes in it stalls. I have the baffle removed and the air box lid is off with a K&N air filter. I am looking to know what kind of jetting specs to do to it. I am using a dynojet jet kit also. Thanks

Freak · #2 11-13-2008, 11:01 AM

Had the same problem on my 500 after a rebuild once. Turned out to be an air leak. Would run fine with the choke on just like yours. MAybe someone else will chime in.

YFZKID · #3 11-13-2008, 07:55 PM

just look at some of my posts you should find an answer in there somewhere!!

**2fun** · #4 11-13-2008, 10:19 PM

Quote:

Originally Posted by nick658

I have a 05 YFZ 450 and it was recently bored out and now I can get it too idle. It will idle perfectly with the choke all the way out. But when the choke goes in it stalls. I have the baffle removed and the air box lid is off with a K&N air filter. I am looking to know what kind of jetting specs to do to it. I am using a dynojet jet kit also. Thanks

Whats your elevation?

What are your current carb settings (pilot, needle, main, fuel screw)?

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