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Old 08-20-2008, 10:05 PM
RLorange RLorange is offline
Motorized Bicycle Elite Member
Join Date: Jun 2008
Location: Australia
Posts: 127
Default Re: Need advice tuning PHBG carby

Good advice thank you! I just studied the Dellorto tuning manual and I understand what you are saying about the needle.

There is no room for a higher notch on the needle but I could drill into the slide body a bit to lower the needle more. As for the cut away I am assuming you are talking about the angled cut at the back of the slide well this is 3-4mm high. There is no cut away at the leading edge at all.


I might try to lower the needle by 1mm and increase the jet size a bit.
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