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Old 07-10-2017, 07:53 PM
Jeff B Jeff B is offline
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Join Date: Dec 2016
Posts: 32
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Higher octane has slower burn. Some say higher octane burns richer. Lower elevation like Nashville Tenn, has higher oxygen density. That may be why my bike is lean with lower octane. I just could not jet it. 102 octane was about right. It was still lean at low rpm. The 40 pilot was about right. The 40 made it perfect at idle to low rpm but rich coming into the needle. I dropped the needle 1 clip. Perfect! I went to a 9 tooth front because it was better for the very tight turns we make. I can not explain oxygen levels scientificlly, but, it works for me. It runs perfect, starts easy, idles perfect. I might run a 45 pilot in colder weather. You are at higher elevation, 92 might be about right. Jeff
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