Fuel supply issue - Suzuki GSX-R Motorcycle Forums Gixxer.com
 
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post #1 of 7 (permalink) Old 07-03-2019, 11:11 PM Thread Starter
Squid
 
Join Date: Aug 2014
Location: Oregon
Motorcycle: 1998 gsxr 1100
Posts: 12
Fuel supply issue

I have a 92 oil cooled 750 with stock carburetion, old Vance and Hines exhaust, and pod filters (this is how I bought it). I had a float needle get stuck open, so I cleared that out and it looked like plastic from the in-tank filter had come loose. The screen still looked fine on the filter though. I put it back together and installed inline filters to prevent any other bits from getting into the float seat. Now I have an issue with the right side outlet (next to the vacuum nipple on the fuel valve), it fills with fuel but then runs dry and won't flow fuel so the bike dies after 3 to 5 minutes (I can keep it going if I blow into the vent tube and presurize the tank, then fuel will fill the right side again, looks like I'm taking a breathalyzer while riding). Is it vapor locking because of the inline filter allowing an air pocket? It only starves the right side outlet, the outlet that goes to the rear gets fuel just fine. Can I just not run inline filters? Stumped. ..
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post #2 of 7 (permalink) Old 07-04-2019, 10:53 AM
Amateur
 
Join Date: Jul 2014
Location: San Antonio and Houston
Motorcycle: 1986 GSXR 815, 2002 Bandit 1200N
Posts: 855
Re: Fuel supply issue

I had the same exact thing happen to me anytime I run inline filters, so I just don't run any and rely on the filter on the petcock inside the tank
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post #3 of 7 (permalink) Old 07-04-2019, 08:02 PM Thread Starter
Squid
 
Join Date: Aug 2014
Location: Oregon
Motorcycle: 1998 gsxr 1100
Posts: 12
Thank you for the insight, glad to know I'm not the only one.

I would love to add extra filtration (old stuff breaking down) if possible. Has anyone done that successfully with stock fuel valve?
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post #4 of 7 (permalink) Old 07-05-2019, 02:54 PM
Track Day Winner
 
Join Date: Mar 2016
Posts: 60
Re: Fuel supply issue

Just upgrade the fuel tap to a Pingel. I run dual separate cleanable metal filters, with a Pingel, to deal with the rust in my tank.

It's only a matter of time until the standard tap mucks you about anyways......
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post #5 of 7 (permalink) Old 07-05-2019, 11:25 PM Thread Starter
Squid
 
Join Date: Aug 2014
Location: Oregon
Motorcycle: 1998 gsxr 1100
Posts: 12
Thank you for the reply, I've been eyeing those fuel taps... spendy buggers. That may have to be the fix. Thanks again!
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post #6 of 7 (permalink) Old 07-13-2019, 12:01 AM Thread Starter
Squid
 
Join Date: Aug 2014
Location: Oregon
Motorcycle: 1998 gsxr 1100
Posts: 12
Resolved: So I went ahead and removed the inline filters and tied the fuel lines as indicated on the parts diagram. I've made 3 short trips and no loss of fuel yet. Hoping the in-tank filter holds up. Thanks for the help
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post #7 of 7 (permalink) Old 07-16-2019, 02:41 PM
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Join Date: Jun 2004
Location: sacramento
Motorcycle: first gen 750's & a '99 750
Posts: 4,420
Re: Fuel supply issue

i don't have much personal experience with second gen dual outlet petcocks, but if you are getting fuel from only one side of the petcock/nipple, and not the other, sounds like it might be the petcock itself. i'd clean it and run it again, or like gixxerrider stated, don't run inline filters, but periodically clean the petcock filter.

i don't run filters on my first gens, but my fuel tanks are in good condition.
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