Question about 2002 Suzuki GSF 600 S Bandit

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Fuel is leaking from the carb into the cylinder and airbox when bike left overnight. Changed the jets but problem still there

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You should adopt the habit of turning the fuel tap off when not riding, this will isolate the gravity pressure from the fuel in the tank.

The jets control fuel flow when engine is running,

I would think your float needle and seat is worn in one or more carby's. try a spray through of carby cleaner by turning fuel tap off and taking fuel drain screws out of all 4 carby's, disconnect fuel hose from fuel tap, allowing fuel to drain from lines and carby's. Spray carby cleaner into fuel hose and allow to flow out through all four carby's, allow to drain fully and dry out. Replace drains and fuel line and let fuel flow to carby's and see if a spray clean has done the job.

If not, inspect each floatbowl needle and seat. The link below gives exploded views of the bike in sections, with part names to help you get to them. Cheers.

http://www.cmsnl.com/suzuki-gsf600-s-bandit-2000-2003-usa_model16067/partslist/

Posted on Jul 31, 2010

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twist the carbs and pull out left side of bike.
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Reassemble the carb and put it back on the bike.
Your carb will work like brand new.
NOTE: If you are not familiar with any of this but you still want to do it yourself. WRITE everything down and label every hose, vacuum line, throttle cable, choke cable, ONE AT A TIME.
This is very important to be successful. Take notes

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Please rate this solution. Thanks Cindi!

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Hi and welcome to FixYa,

Initially, a few possibilities you may want to check/explore:
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  • vacuum leak (rubber coupling, manifold side);
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Basically, a general cleanup of the fuel lines, tank and the carbs. Sitting for some time tends to leave varnish like coating on most parts.

Good luck and Thank you for using FixYa. Happy Holidays.

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