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Posted by gdrudd13
- July 07, 2014, 09:36:27 AMOne thing about the petcock is that it is vacuum actuated, so when the there is no vacuum on the line (such as when the bike is not running) no fuel will come out. It's kind of a failsafe I guess. This is both in the on and reserve settings. so with the gas running out freely on prime, but not on "on" or "reserve", it sounds like it is working correctly.
Does the bike run now? Before you tear stuff apart again, I would hook up the fuel and vacuum lines and see what happens. It would be a good idea to turn it to prime for a couple of seconds before turning it to the "on" position if it has been sitting for a long time.
Posted by CDNRatMan
- July 06, 2014, 20:43:03 PM Troll has you on the right path. Check you cap and the vent, unless the fuel has been sitting for a winter or so it should not have varnished.
Your issues are sounding like Driftingirl's and she cleaned her vent and around the fuel cap and it was good to go.
Posted by Troll
- July 06, 2014, 20:27:06 PMPRI means PRIME, and that's what it's supposed to do. Check the vent in the cap and the vent hose, both could be a source of difficulty
Posted by scamp62
- July 06, 2014, 20:19:24 PMI was having a problem with keeping my Drifter 800 running, it would just stop running after a minute or two! no sputtering, just off ?!? but after a few moments I could start it ?? I tried it again with the petcock in the reserve position and it ran with no problem (and yes I had a half a tank of gas in it !!) so I decided to rebuild the petcock, I figured that the crappy gas we have now, it was varnished, and clogged with it, after the rebuild I found that when in the "PRI" position fuel ran out freely from the tank (and into my shoe !), I don't remember it doing that ?? is that correct ?? in the reserve and ON position nothing comes out the petcock. So did I do the rebuild right 
and one last question for today is what is the difference between "PRI" and "ON" ?? call me old school but I'm use to "ON" and "OFF" ! any information would be appreciated !