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Old 06-07-2010, 07:57 PM   #33
One Less Harley OP
OH.THAT'S GONNA HURT
 
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Joined: Nov 2006
Location: Bowling Green, Ky
Oddometer: 4,415
I have been doing some jetting changes on the G/S, the bike was jetted with 135MJ/ 45 Idle jet needle position unknown, millage was OK, 42-44 on back roads under 75mph, but starting from cold was bad, as bike wanted to die when giving throttle until warmed up for about a minute.
here's a list of jets and MPG figures for the bike.

Note- I am not heavy on the throttle, and ride fairly sedate. Sometimes spirited but not extremely hard on it.

Stock Carb Settings
Main Jet 135 (150 stock, 130 stock for 1981)
Idle Jet 45 (45 stock for 1981,40 for 83-86)
needle Jet 266 (stock) , needle has about 15,000 miles
Needle clip 2nd from top (3rd stock)
Needle 46-241 (46-251 for 1981)



Main jet Idle Jet Speed/Conditions Needle Position from top MPG Date/notes
150 45 65-70 bottom 38
150 45 60-70 bottom 38
135 45 -75 3rd from top 42-44 choke not very effective
150 45 60-70 bottom 38.9
150 40 60-65 rain bottom 41
150 40 55-60 bottom 39.7
142 40 55-60 3rd from top 44.02
142 40 55-60 3rd from top 45
142 40 55-60 3rd from top 45












135 45
1st from top 38

2.68 needle jet, cold start BETTER
8/16/2012, plugs dark, runs great, slight hesitation at constant speed of 50plus

135/ 45/ 3rd from top / 38 mpg/ runs great but plus mostly black,2.68 needle jet/ electrode a little lighter (4/10/2013)












































































































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One Less Harley screwed with this post 04-10-2013 at 06:25 PM
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