plug gap for srx with br9ecs plugs

Spinner18

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Jan 16, 2006
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Virginia, MN
Whats the plug gap for these? Also, whats stock main jets and pilot jets in 2001? Going to swap exhaust from aaen back over to stock with hauck growlers and would like stock jetting. that way i know if i am going to be racing, i can put the stock muffler back on and be faster. thanks
 

.028-.031" should come pre gapped ,,, ecs plugs they recommend to not adjust...
 
Last edited:
40 on the pilot & #1-150. 2&3 148.8 for mains @ sea level. Check out tech section for all stock specs....
 
why would the clutch side be jetted the fattest? i figured the mag side would have been fattest since its closest to the pipes getting more heat.
 
I like .018 for the plugs. Don't know why yamaha suggests .028-.031. Takes alot more energy to bridge a larger gap. And it won't happen if you have alot of cyclinder pressure such as in a mod motor. Skidoo has run .018 for years that is why you can get the ecs's pregapped at .018.
 


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