carbeurator jets?

Question

When i purchased my bike, 2000 suzuki gfs600 bandit S, it came with the vance and hines ssr2 system exhaust on it. i'm assuming the jets had been replaced with this system install. ive recently added a k&n air filter to the mix and bike is running horribly, almost no power. do the jets need to be replaced again and if so which jets and what size. ive heard main jets only and have been told 165 or 170 for the jet size. does anyone know for sure or how i could find out?

Answer 1

Carburetor jetting is a tricky process. You can go the trial and error route. Keep changing until you get the right combination. With a free flowing exhaust and air filter, the jets should be replaced. Go the simple route and buy a jet kit. The kit will have a new jet needle and main jets. The instructions will tell you which jets from the kit you should use for the modifications you've already made. Your bike comes with a 92 main jet, so going up to a 165 is overkill and will run just as bad.

Answer 2

THERE IS ONLY ONE WAY TO DO IT PROPERLY



As far as changing exhaust systems, the best place to go to get your bike running sweet is the local bike dyno tuner. No guess work here, they will find the correct jets and mixture settings.

None of that tuning by ear rubbish, they charge by the hour. It could cost $30 or $200.



Another thing with some susukis, especially the across 250, is the idle needle wears quickly. The point on it wears aways and needs to be replaced every 6000 miles. Not familiar with bandit carbs, but you never know.

Answer 3

I agree with guardrailjim. Another option would be to take it to a Suzuki dealer and have them fine tune everything for you. Just in case your not mechanically inclined. I'm not so my mechanic John takes care of everything for me, including drinking a little of my beer and eating at my small cookouts. It is always good to keep the mechanic happy.

Good luck and enjoy the ride.