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My '66 N15CS 750 is stock except .040 over 7.5:1 NOS stock replacement pistons and the single Mikuni.Needle jet 159 P-2. It's what i had, and it does fine, but P-0 is the recommended one.Main 230.Idle 27.5. I had it at 32.5 and same issues you are describing. Go down 2.5 or 5 I'd say. That was the last thing I had to do plus getting a 'real' Mikuni rubber spigot. Turned out I had a cheap copy and it leaked air, really messed things up. Now runs sweet.Needle 6F15, set to middle it's what I had and it works.slide cutaway 2.5air jet 2.0
My '66 N15CS 750 is stock except .040 over 7.5:1 NOS stock replacement pistons and the single Mikuni.
Needle jet 159 P-2. It's what i had, and it does fine, but P-0 is the recommended one.
Main 230.
Idle 27.5. I had it at 32.5 and same issues you are describing. Go down 2.5 or 5 I'd say. That was the last thing I had to do plus getting a 'real' Mikuni rubber spigot. Turned out I had a cheap copy and it leaked air, really messed things up. Now runs sweet.
Needle 6F15, set to middle it's what I had and it works.
slide cutaway 2.5
air jet 2.0
