Question about Honda CB 750 Motorcycles
Standard jets for the CB 750 are 120's, popping and kicking are usually due to running lean which is probably why it runs great with the choke on as that riches it up. I've run 115's with no problem but 100's??? Maybe was trying for better fuel mileage when gas was $4.50 a gallon?
Posted on May 10, 2009
According to the Haynes manual, post 1980's CB750F's had stock jet sizes 68 and 100...so it sounds like you're probably fine there. Also, the pilot (idle) mixture screws on the on the bottom of the carbs only really affect the mixture at idle (1 1/2 turns out is a good starting point). The most likely reason that you're running lean is that, while the float bowl areas are clean, there are blockages in the jets/passageways through the carbs. You really can't clean these carbs enough. So my advice would be to spend some quality time cleaning.
Posted on Sep 08, 2012
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Posted on Jan 02, 2017
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