CRF450X baja jetting?

[NWThumper]

I have a 2007 Crf450X. We had a major meltdown in the Baja 1000 because we were very lean and paid the price. We have a new motor and are going to put the race bike on a Dyno to help get proper jetting figured out. We have installed a 08 CRF450R Cam, Airbox mod/not butchered and a Pro Circuit Pipe. I am trying to accumulate all the jets I will need.

I received these jetting recommendations (stock exhaust with core removed), air box mod, stock air filter.

stock cam -->main--->170

08 cam shaft mod---->178 main

pilot--> 45

starter jet--->65

NCYS needle 4th from top

My questions are:

1. Do people change the starter jet? Isn't this jet only used when the choke is on?

2. Should the starter jet recommendation actually be a leak jet change?

3. If I change the starter jet, does anyone have an OEM part#. I have looked on the TRX, CRF250x and a few other models that have this carb setup but no luck in finding a 65 starter jet.

Thanks for your help.

[Wayward Son]

1. rarely.only works when using the choke.

2. no

[NWThumper]

Thanks Eddie!

[motodogg01]

William1 pointed me to the below lilsted PDF for my 2007 CRF250 jetting. First four-stroke I've ever owned so it helped me.

D/L and read this:FCR-Tuning Guide

(I hope that link worked right)....

[motodogg01]

No it didn't. You can go do a search for "2007 CFR250R -- Jetting < Off idle bog >" and get the DPF from the William1 post there. Sorry, haven't figured out how to past working links into a post yet. Hope that helps, bro!