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Message started by Mike M on 05/04/08 at 20:32:04

Title: Petcock Mod - Partial Success
Post by Mike M on 05/04/08 at 20:32:04

About a week ago I posted with the symptoms of a fuel delivery problem and got the suggestion to try the petcock mod - remove the diaphragm and plug the prime opening in the plastic cylinder. I did that and it worked, but I still have a slow leak past the shutoff position (formerly prime). I'm pretty sure I caused it by some sloppy finishing work after I placed a screw if the opening. I used some pvc pipe adhesive stuff to cover the screw/plug because I didn't have any epoxy and the nearby hardware store was closed. Anyway, until I fix my mess, what risk is that slow leak into the hose to the carb? I disconnected the hose to the carb and plugged it until I better understand if that is really necessary. Say I ride to work in the morning and leave it connected all day - am I going to cause some kind of fuel backup or overflow problem throught the carb? Thanks in advance for your help.

Title: Re: Petcock Mod - Partial Success
Post by barry68v10 on 05/05/08 at 13:50:51

If the float valve in the carb is working properly, you don't need a petcock at all. On the other hand, if that valve fails, the petcock in an "open" configuration will stop the carb, and ultimately the engine crankcase, from overflowing with gas. If you then drive the m/c with the crankcase filled with gas, your looking at new engine/transmission.

Title: Re: Petcock Mod - Partial Success
Post by Mike M on 05/06/08 at 08:38:17

Thanks Barry, that's what I thought but wanted to hear some confirmation. One way or another, I'll get it to stop leaking.