Print Page - Fuel Problem

Title: Fuel Problem
Post by: Stime187 on May 24, 2004, 08:15:12 PM

Hey everyone,
I was riding today and the bike kept bogging then cutting off when i'd roll on the gas, did this in the "ON" position, switched to PRIme, fired up and no more problems. Back to "ON" it died again, back to PRI it was fine... so question is, anyone have any clue what might be doing this? I think there might be some in the fuel pick up from the tank but haven't gotten in there to check... nothing in the lines though, and i don't think the filter is doing it...

Thanks for any help,
Scott

Title: Fuel Problem
Post by: MarkusN on May 25, 2004, 12:33:11 AM

Simple things first: enough fuel so that you don't need to switch to RES (which PRI does as well)?

Kinked ON-hose (allowing enough fuel flow for idle, but not for OT)?
Vacuum leak (The hose going from the top of the left carburetor tot he petcock)?

Title: Fuel Problem
Post by: Stime187 on May 25, 2004, 05:58:16 AM

FULL tank, only got about 12 miles on it... and I'll check those other two things.

Thanks,
Scott

Title: Fuel Problem
Post by: Stime187 on May 25, 2004, 03:28:48 PM

Bump. No kinked hoses. I have everything fuel wise (cept the carbs) apart and the problem has to be before or in the deal that selects which fuel setting... bike runs on PRI and bogs down and starves out on "ON".

Please help if you have any ideas...

Scott

Title: Fuel Problem
Post by: Kerry on May 25, 2004, 03:55:09 PM

Can't tell from your last reply - how does the vacuum hose between the left carb and the petcock (and the connections on either end) look?

The ON and RES settings on the petcock only pass fuel on a vacuum pulse from the left carb. This only occurs when the engine is running and when the vacuum connection is air-tight.

If the hose looks good your next step is probably to open up the petcock and inspect the diaphragm inside.

Title: Fuel Problem
Post by: Stime187 on May 25, 2004, 04:20:43 PM

Hose is fine, sorry I forgot to mention that. The petcock diaphragm would be inside the 4 screws on the fuel setting deal, right?

Thanks,
Scott

PS- Would it matter if I just rode my bike w/ it on PRI?

Title: Fuel Problem
Post by: Kerry on May 25, 2004, 04:35:08 PM

Yep, diaphragm is under those 4 screws.

Riding on PRI is fine if you don't anticipate leaky float needle valves, and you don't mind having no "almost out of gas!" notification.

Title: Fuel Problem
Post by: Stime187 on May 26, 2004, 08:05:20 AM

I believe its fixed. Took everything apart, cleaned it, put all back together. Diaphragm wasnt seating right I don't think, maybe that caused the vacuum problems... who knows. Didnt do the problem today.

Thanks,
Scott

Title: Fuel Problem
Post by: Kerry on May 26, 2004, 10:09:31 AM

Good job! Congratulations! I love it when things work out.

Title: Fuel Problem
Post by: Stime187 on May 26, 2004, 01:05:52 PM

Thanks Kerry, from what I can tell, you're truly one of the most helpful people I've come across... :cheers:

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Main Area => General GS500 Discussion => Topic started by: Stime187 on May 24, 2004, 08:15:12 PM