81 gs 850g jetting?

[scottsgs]

Hi to everyone,

Does my 81 gs 850g which is stock except for v&h 4-1 exhaust need to be jetted from stock? If so, what would be the recommendation?

[Dave8338]

If needed, go with a stage 1 from Z1.

[doctorgonzo]

Dave's solution is the best. DIY is going to be experiment with 1 or 2 size move up in main jet and shimming the stock needle.

[Steve]

Not sure how the V&H would differ from the pipe on my son's '81 850, but I can tell you how that one is set up.

120 main jets, needles in stock location, mixture screws are not fully tweaked, and are 2.5 turns out.
Bike starts easily, runs smooth, accelerates cleanly, plugs look good.
Not sure what brand the pipe is, but it has a baffle that forces the exhaust through the perforated pipe twice before allowing it out the back end. The chamber is packed with #3 steel wool. It feels and sounds good. As soon as I can, I will be tweaking the mixture screws and calling it "good".



.

[psyguy]

i have 115 mains and 42,5 pilots
pilot screws on 3.1/2 turns out
the needle is notched and is on the 4th groove from top (out of 5)
runs good but a size bigger main wouldnt hurt i think

i have a k&n inbox filter
and a pretty open 4-1