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General Category >> Rubber Side Down! >> Runs then dies
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Message started by bryguy on 06/16/08 at 15:57:01

Title: Runs then dies
Post by bryguy on 06/16/08 at 15:57:01

I just bought a 99 savage 650 from a guy who had it sitting for over a year in his garage. when i picked it up he said everything was fine it just may need an oil change, he said he had put carb cleaner in the tank. it ran well until i filled it up with gasoline. i used 89 octane unleaded (which shouldn't matter). now when i start it up it runs for a little while then starts to backfire and die when i give it gas. if i run it on reserve it doesn't do this, i don't know if its because it is still running off the old gas or if its a problem with the valve or the carb. any suggestions? thanks.

*update, keeping the bike on reserve actually does NOT remedy the problem, the only way to keep the bike running is to leave the fuel valve on PRI

Title: Re: Runs then dies
Post by Texas-1-lunger on 06/16/08 at 15:59:15

Your petcock id more than likely gummed up with varnish if it dosent do it in res.

Title: Re: Runs then dies
Post by toddlamp8 on 06/16/08 at 19:13:35

Both RES and ON require suction from the engine to open the diaphragm. If it only runs on PRI than your diaphragm is not functioning properly. When you filled the tank do you remember moving the petcock from PRI to ON? I wonder if the original owner just kept it in PRI for this very reason and then when you filled it up you changed it to ON (as you should).

Title: Re: Runs then dies
Post by Jonny_Chicago on 06/16/08 at 19:33:01

Is the petcock mounted properly? When I bought mine, it was put on upside down for some reason. Had similiar problems.

Title: Re: Runs then dies
Post by Sandy Koocanusa on 06/16/08 at 19:58:03

Upside down?

Title: Re: Runs then dies
Post by Jonny_Chicago on 06/16/08 at 20:09:03

my bad, i mean the vacuum tube wasn't connected properly. The tubes were switched.

Title: Re: Runs then dies
Post by Sandy Koocanusa on 06/16/08 at 20:44:22

I sat here staring at the old petcock I have in a million pieces on my desk. "Upside down? hmmm, maybe, no. Upside down? How the he!!" Thanks for clearing that up. Now I'll be able to sleep tonight. :)

Title: Re: Runs then dies
Post by Jonny_Chicago on 06/17/08 at 10:48:48

ha, no prob.