I'm currently working on my neighbor's GS250T which is running very poorly. As a little background, he purchased the bike last year and rode it around. He said it ran great till one day it just died. He took it to another friend who discovered that the petcock diaphragm was leaking and this was supposedly the source of the problem. He replaced the petcock with a new one from suzuki, replaced the plugs, and "cleaned" the carbs, and returned it. Upon return, the bike would spew gas from the left carb.
Then I received the bike to work on. I replaced the needles (leaking), readjusted the float height, and completely re cleaned the carbs. I found a great deal of junk still left in them. EVERYTHING has now been cleaned... new o rings, no leaks, fuel level set properly (4mm below top of bowl), pilot screws set at 3.5 turns out (stock location on this bike as I had to drill the plugs out), stock jets.
Sorry this seams to be getting long but I find it best to give a little info up front to avoid the "how did you clean the carbs" questions. Anyway, onto the problem. It seams to be running very lean. It starts ok with some choke but any amout of throttle kills it off idle. If you coax it up to 4000 with the choke on full, the throttle just causes it to bog down. Someone at one time put uni foam pod filters on this bike. Now I know a lot of you are saying "well da, theres your problem... pods and stock jets" but I am confused as to why the owner would have said it ran great last summer with this same configuration and now it wont hardly run.
Is there something else besides carbs I should be looking at? Does everyone agree that I should just go back to the stock air box set up and that should clear things up? Could something else besides the petcock have went wrong last year when this bike misteriously just stopped running? Am I missing something here?
Thanks so much in advance for any help. You GSR'ers are such a great help!
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