Stock carb settings for '80 Sportfire

Platinum_2 · Post by **Platinum_2** » Tue Feb 05, 2008 12:45 pm

Anyone know the factory specs for tuning the carb on a 1980 Sportfire? I need to adjust the idle and also the needle on the throttle slide.

Platinum_2 · Post by **Platinum_2** » Sun Feb 10, 2008 2:47 pm

c'mon, anyone?

--Gary

bpmailman · Post by **bpmailman** » Sun Feb 10, 2008 2:57 pm

air screw should be at 1.5 turns open. idle rpms 2400-2700

mike

ChickenRat · Post by **ChickenRat** » Sun Feb 10, 2008 2:58 pm

Gary,

According to my fine tune manual for the Sportfire:

Main Jet: 210
Power Jet: 170
Jet Needle: 6F27-3
Needle Jet: (159) Q0
Throttle Valve: 3.0
Pilot Jet: 25
Air Screw: 1 1/2 turns open
Idle Speed: 2400-2700 rpm

Hope this helps,

RObb

Platinum_2 · Post by **Platinum_2** » Sun Feb 10, 2008 3:10 pm

Thanks guys, this helps a lot! One other question, on the the throttle slide on the carb (the cap) there is a there's a rod that looks like it can be adjusted since these carbs do not use the "e" clips like other Mikuni carbs. Is that supposed to be adjusted a certain way? What is its purpose?

TASKY · Post by **TASKY** » Mon Feb 11, 2008 5:36 pm

Which side of the throttle valve needs to clear, just the back cut out part or the front? I would assume the front, which would make the back clear also and let in the maximum amount of air.
While going through my manuals I see it is worded differently from manual to manual leaving it open to interpretation. Thanks TASKY