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I just purchased a used banshee with a Rhino head on it. The seller told me that it has 16 cc domes in it, which I believe is true because compression measures just over 210 pounds. I would like to change the domes out to get about 150-160 PSI, but I don't know if Prodesign coolhead domes will fit or if I must get the ones directly from Rhino. The ones from Rhino are like $90 a set.

 

 

What would be the minimum octane at that compression? In my other bikes, I set them up for 155-160 PSI and run 91 pump fuel. At 210, I know I need more octane, but how much I don't know.

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