82 GS1100 Main Jet Size

[Mith]

I'm rebuilding the carbs for an 82 GS1100 and would like to know what you think about the main jet size that arein them. I found 120's in them and the bike has the original exhaust and stock airbox and filter. According to the list below it should have 115's. Should they be changed?


>GS 1100
>1982-83
>G, GL, GK Model

>Carb ???????. Mikuni BS34SS (4 separate carbs)
>bore size ?????. 34mm (1.34)
>id no ???????. 49400
>idle r/min???.... 1050 +/- 100 r/min
>fuel level ?????. 5.0mm +/- 0.5 (0.20 +/- 0.02)
>float height ???? 22.4mm +/- 1.0 (0.88 +/- 0.04)
>Main jet??????. #115
>Main Air jet????? 1.7
>jet needle?????.. 5D58
>Needle Jet?????? X - 3
>Pilot Jet??..????. #40
>By-pass?.?????? 0.9, 0.8, 0.8 (0.04, 0.03, 0.03)
>Pilot Outlet?????? 0.7
>Valve seat?????? 2.0
>Starter jet?????? #50
>Pilot Screw............. PRE-SET
>Pilot Air Jet?????..#170
>throttle cable play ?. 0.5 ? 1.0 (0.02, 0.04)
>Choke Cable Play??. 0.5 ? 1.0 (0.02, 0.04)

[FreshStart]

Where are you located? Canadian GSs were lean from the factory so many owners went up a size

[7981GS]

If the plugs are showing signs of running a little rich,
a change down to 117.5's might help with running and mileage.

Daniel

[Mith]

Thanks for the replies. I'm in the US so perhaps the data that I was comparing the jet sizes too was Canadian. I'll keep an eye on the plugs once the carbs are back in and they are sync'd.