Well it's been a long road, but well worth it. This old girl is finally running great after 4 weeks of testing, tuning, and waiting to receive jets a few times over. I've got some jetting numbers to share to feed the hungry baby birds out there who seek to run a bleed type needle jet. Keep in mind, these numbers work for MY bike in MY conditions. Perhaps it will get you in the ballpark and save you some cash.
Bike:
1972 Honda CB350 twin
Generic 12" shorty mufflers, freshly repacked, with additional baffle inserted before muffler</u> for a bit of backpressure and less raspy pop
NEW Mikuni VM30's and K&N pod filters
Fresh points at proper gap, condenser, plugs, valves checked, correct timing, clean and smooth timing advancer, good compression
87 octane fuel w/10% ethanol
Conditions:
Typical hot summer, sea level.
Jetting:
Main Jet:Large Hex 200
Emulsion tube/Needle jet: BLEED TYPE 176 series P-8
Slide: 2.5
Pilot jet:30
Needle: 5F3, lowest (richest) clip setting
Air Jet: 0.5
Air Screw: 2.0 turns out
So far I've got a few hours of spirited riding on this combo and it feels great from idle to redline at all throttle positions. Plug has a slight cardboard color so far and I'll keep an eye on it. The bike can idle for an extended period and still have a clean off-idle response. I'll eventually try an even richer needle to get the clip settings closer to the middle, but let's enjoy it for now. Hope this helps.
Bike:
1972 Honda CB350 twin
Generic 12" shorty mufflers, freshly repacked, with additional baffle inserted before muffler</u> for a bit of backpressure and less raspy pop
NEW Mikuni VM30's and K&N pod filters
Fresh points at proper gap, condenser, plugs, valves checked, correct timing, clean and smooth timing advancer, good compression
87 octane fuel w/10% ethanol
Conditions:
Typical hot summer, sea level.
Jetting:
Main Jet:Large Hex 200
Emulsion tube/Needle jet: BLEED TYPE 176 series P-8
Slide: 2.5
Pilot jet:30
Needle: 5F3, lowest (richest) clip setting
Air Jet: 0.5
Air Screw: 2.0 turns out
So far I've got a few hours of spirited riding on this combo and it feels great from idle to redline at all throttle positions. Plug has a slight cardboard color so far and I'll keep an eye on it. The bike can idle for an extended period and still have a clean off-idle response. I'll eventually try an even richer needle to get the clip settings closer to the middle, but let's enjoy it for now. Hope this helps.
