Jetting for piston and pipe 2008 YZ450F

1 reply to this topic
  • gtxkid

Posted February 13, 2012 - 09:31 AM


I moved from Colorado to Florida.
Bike has a 13:75 to 1 piston in it with a DR. D pipe.
I am now at sea level.

Problem is i need to rejet.
I had a 162 Main
48 pilot.
Put a 45 pilot in and a 178 main THAT didn't work
Only works good from 1/4 throttle to 3/4 throttle
I think i need a 164 to 168 main and a 48 pilot.

I want to get it close so i only have to pay for 1 dyno run to have final check.

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  • grayracer513

Posted February 13, 2012 - 10:35 AM


Read through this:

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