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Hey guys I have a 99 Conquest with a fd620d Kawasaki engine I just rebuilt the carburetor and it still won't stay running well. I get it all tuned up with the air fuel screw and idle set perfect tighten everything down. Put the air filter back on and about 2 minutes into riding starts running like crap seems to happen after I bounce off of something or run over a log. Not sure if something could be loose inside but I am able to limp it back to the shop with using the choke. When I get back to the shop I let it sit for a while go out started up again and it runs great again for about 2 minutes then does it again. Any thoughts. Everything is stopped stock except I cut the fuel cut off pin