Quote:
Originally Posted by hunter0319
okay i mustve miss read the instructions so im running rich? when its hitting 9.0-11.0 at full throttle. the bike seems to run better when its a cooler than when its warm
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Yes, cold air is denser, more oxygen molecules per piston stroke which may result in 10:1 AFR.
Warmer air (heated by warmer engine) is less dense, so fewer oxygen molecules per stroke. Yet same amount of fuel will result in richer mixture of 9:1. Which causes lazier burn and sluggish throttle response. Not to mention that much fuel will wash oil from cylinder walls and cause premature wear on engine.
BTW - 9:1 AFR is at limit for rich end of wideband sensor, so you may actually have richer than that mixtures.