Why did Yamaha stagger the jetting?

Corey9965

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Dec 22, 2004
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Why are the '98-'99's richer on the mag and the later years richer on the PTO? Could I stagger the '98 jets like the '01's and be safe?
 
Why do you want to? Are you watching each cylinder for the right plug color and temp?
 
Corey9965 said:
Why are the '98-'99's richer on the mag and the later years richer on the PTO? Could I stagger the '98 jets like the '01's and be safe?

JMO:

One of the possible reasons the jetting stagger is different from the 98/99s to the 2000-2002s that may effect airflow:

- the 98 + 99s airbox came from the factory with the vertical airbox dividers in the lower part of the airbox but Yamaha did not install these in the 2000 - 2002 airboxes.

JM.02c:

I don't stagger my jetting on any of our tripples SXs + SRX[now that they are trail sleds only]. I jet the leanest cylinder for a safe reading on the plugs + piston wash then jet the the other 2 cylinders the same + forget about it.

Works for me!
 
Last edited:
I don't have the divider in my airbox. So I am looking for something for that. Thats why I was inquring. Still waiting for some safe ice to really be able to open her up safely. Was just looking for a jump off point.
 


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