Jetting from 4000ft to Sea Level

I bought an 06 yz450 with a FMF Factory 4.1c that was jetted for 4000ft. I rode it for the first time today around sea level (up to 1 or 200ft) and it ran great. I havn't checked which jets I have, but I know it was set up for 4000ft. Should I worry about running to lean, can I hurt the motor?

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