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BS32SS Jetting

Bob Shaw

Forum Mentor
I have an 82 GS850G. I've been thinking of putting on a 4-1 exhaust. I know I have to jet the carbs and the kits that are advertised call for stage 1,2 and three. Which one do I use? Also is it necessary to change the intake filter to the pods.
Thanks, Bob
 
Pods aren't necessary. And the general recommendation is to go up 2 sizes on the pilot jet for exhaust, but it will depend on what your bike will like. Some have had to rejet, others haven't. They also say it varies from manufacturer to manufacturer
 
Just up 2 sizes from what is in there now, not a stage 2 kit.
 
It also depends on your pipe. :-k

Some pipes advertise "no jetting necessary". The way to interpret that is that they don't flow any more air than the airbox can handle, so there is no need to increase the jet size. That would also indicate that it's relatively restrictive, which you can interpret as QUIET.

I have a rather quiet pipe on my bike. No idea who made it but it sounds great. Took it off my son's bike before we sold the bike, kept the jets that were in the carbs, too. I have not done any official testing to determine if they are proper, but they are close. I have 125 mains, which is four sizes larger than stock. Might be a little rich for my bike, have 122.5 and 120 jets available for testing.

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