Sign in to follow this  
Followers 0
humpness

whack the throttle

5 posts in this topic

I installed my Q4 and megabomb a week ago and I am having troubles with bog when i whack the throttle. It was jetted very nice up until the new pipe. I can kill it pretty easy it also has some popping(little excessive) along with it. I feel my pilot screw is tuned right(2 1/2 out).

my bike is a 07 yzf450. 48 pilot, 168 main, stock needle 4th clip

Do I need to do the O ring mod? Can I do this without removing the carb? I had a friend work on my carb a while back, I think he used safety wire before on my bike but im not sure. He also said something about a grinder also. Im hoping maybe the safety wire or the o-ring broke or came undone.

Edited by EOYZF
change

Share this post


Link to post
Share on other sites

Did you look into what FMF says for the are recommended jetting specs for that set up ? My 06 yz450 had to be re-jetted and I have the mega bomb and carbon 4.1 slip on. You can put a new plug in your ride to see how the carb is working but it is probably running rich with that mega bomb and it needs to be leaned out. just a guess tho, check out FMF site for recommendation.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0