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Discussion Starter #1
Iv got a 07 grizzly 700 with a stock engine currently running a hmf slip on, a k&n filter, and has a snorkel kit. I have the optimizer gen3 but I'm not shure wat the set points should be at for my low,mid,and high range. Not shure if the last guy changed them from the stock settings either. Any help would be appreciated. Thanks
 

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Best thing to do is buy a AEM wideband air fuel gauge. ($160) drill a hole and weld the 02 bung on the exhaust somewhere at least 16" away from the exhaust tip and use it to tune the Air fuel ratio yourself using the tuner. Every engine and every elevation is going to require slightly different settings to be optimal. Shoot for 13-14 AFR on the gauge @ idle and light throttle and 12-13 AFR on acceleration and full throttle.
 

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Welcome from Colorado.
 

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Welcome 2 GC.
 
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