Quote from: thehooligan on August 14, 2012, 04:28:06 PM
i have narrowed it down to this issue: the bike runs when its on "prim", but not on "on".

when in doubt, have a third point of reference.
You didnt say what happens with it on "res"

Also, does the choke have any effect on it running?

ok guys i got really frustrated with the bike today.

i tore off everything up to the carbs and put it all back on. i threw away all the vacuum hoses and followed the factory diagram for reinstalling them.... and guess what....

THE PREVIOUS OWNER HAD THEM ALL F&*%$D UP!

i also removed the secondary air system.

after putting everything back on and using my fancy water bottle with a petcock instead of a fuel tank...

it runs!!!!

it runs perfectly!

thank you all for your help




and no, it wasnt the battery 

That... is hillarious.

Makes you wonder how yoou ever got that first ride going.

Maybe it was in pieces just before you bought it, he threw it together agian, but it degraded quickly? ??

one more quick issue.

i put everything back together again tonight checking and rechecking for fuel leaks and when i was satisfied there were none i started her up. she ran just fine and warmed up very quickly thanks to the "farking unbelievable" spark plugs. after about a minute of idling i got on and started revving a little to mke sure everything ran fine. i did this for about 2 minutes revving a bit then dropping the throttle closed. i noticed two issues that concerned me. 1) occasionally the revs would hang between 2-3k for a split second then fall back to idle and 2) once i turned it off i noticed fuel dripping onto the ground coming out of my filter. i did at one point hear a decent pop while it was falling back to idle once as well. it seemed as if the left hand carb was dumping fuel out into the filter from one of the two holes at the six o'clock position of the carbs intake.

incase you are wondering i have the lunchbox style filter but have not rejetted yet (jets are in the mail)

Check the float on the left carb. Sounds like either the float height isn't set properly or the needle valve isn't sealing.

If the needle isn't sealing what needs to be done?

Replace it with a new OEM needle valve, needle valve seat, and O-ring.

thats a 6,7, and 12?


http://www.bikebandit.com/2007-suzuki-gs500f-carburetor/o/m16095sch649433

21. I'd recommend checking the float heights first; throwing 50 bucks out when you don't need to is no fun.

couldn't agree more, I'm checking the float height tonight. i just wanted to be prepared if i need to replace it