Jetting after Big Bore ???

What should i expect in terms of jetting after installing a big bore top on my 2001 KX 250 ( 310 ) ?

Thanks

May have no change. Depends on how perfect the jetting was before.

If it was too lean, it will probably be perfect now.

If the jetting was absolutely perfect (confirmed with a widband A/F sensor) you may find you have to lean some.

If it was too rich, it will be way rich now.

May have no change. Depends on how perfect the jetting was before.

If it was too lean, it will probably be perfect now.

If the jetting was absolutely perfect (confirmed with a widband A/F sensor) you may find you have to lean some.

If it was too rich, it will be way rich now.

What do you consider about perfect for a 2t in regards to a/f?

Typically abut 12.8/1 to 12.5/1

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