JD Jetting and quickshot for YZ426?

I have a 2002 YZ426 used mainly for trail riding at altitudes from 1,000 - 5,000 feet. At the higher altitudes I get a significant performance drop-off including poor low-end throttle response. I'm thinking that the Boysen Quick Shot would help with that but I know that the jetting needs to addressed also...should I go with the JD Jetting?

Also, some of the single tracks get pretty slow, steep and rocky requiring lots of clutch work in 1st gear so I'm going to gear down a little bit, but I sometimes get concerned with overheating although I haven't lost any coolant...is Engine Ice recommended?

Interestingly enough, no matter the elevation I have zero problems with hot or cold starting.

I'd appreciate any tips...thanks!

I have a 2002 YZ426 used mainly for trail riding at altitudes from 1,000 - 5,000 feet. At the higher altitudes I get a significant performance drop-off including poor low-end throttle response. I'm thinking that the Boysen Quick Shot would help with that but I know that the jetting needs to addressed also...should I go with the JD Jetting?

Also, some of the single tracks get pretty slow, steep and rocky requiring lots of clutch work in 1st gear so I'm going to gear down a little bit, but I sometimes get concerned with overheating although I haven't lost any coolant...is Engine Ice recommended?

Interestingly enough, no matter the elevation I have zero problems with hot or cold starting.

I'd appreciate any tips...thanks!

engine ice usualy only drops temps down by 10 degrees

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