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Jeremy R.
Jeremy R., Mechanic
Category: Motorcycle
Satisfied Customers: 9020
Experience:  15+ Yrs Factory certified technician and business owner.
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I have a YZ250 2t i use trail riding. The power

Customer Question

I have a YZ250 2t i use for tight trail riding. The power jet and the pilot jet are 45. The circle for the needle is in the 2nd groove from the top. I live 900m above sea level.
Please could you advise as to what size main jet i should be running.
I shall wait for your reply. Thank you.
Mark Deane.
Submitted: 2 years ago.
Category: Motorcycle
Expert:  Jeremy R. replied 2 years ago.
Hi, Sorry for the long wait.Your main jet should be a 178OEM part number is *****