Gas Cap Leaking Fuel - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 06-10-2017, 04:21 PM Thread Starter
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Gas Cap Leaking Fuel

I disassembled the gas cap to clean. One of the O-rings for the screws was deteriorated and in half. It had a slight leak so a few weeks ago I bought a big assorted box of O-rings from the hardware store - perhaps they are too thick because now after fill up gas is leaking from the entire bottom, and you can hear it hiss and watch the gas flow out after shut off.

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Hookin' Ain't Easy

Current Rides
2013 F550 XLT 6.7 Powerstroke (Tow Truck)
2002 Ford Mustang GT Convertible (Too Many Mods)
2003 Ford Mustang GT Convertible (Too Many Repairs - Wife's D/D)
2006 Vulcan 750
Purchased 05/17 8900 miles

R/R Relocated
Voltmeter/USB Charging
K&N Air Filters
Spline Lube
Pirelli MT66 Tires Balanced w/Ride-On

Last edited by Golf; 06-10-2017 at 05:31 PM.
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post #2 of 5 (permalink) Old 06-10-2017, 06:53 PM
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check the vent circuits in the cap. also check the vent tube from the cap area to rear of tank, and the rubber hose from that to below frame. any of the above will keep it from venting properly

2005 VN750

Sold 11-27-17
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post #3 of 5 (permalink) Old 06-11-2017, 12:07 AM Thread Starter
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It didn't start leaking until I changed out the O-rings around the screws, and that's where it's leaking from

<- Slow Down, Move Over ->
Hookin' Ain't Easy

Current Rides
2013 F550 XLT 6.7 Powerstroke (Tow Truck)
2002 Ford Mustang GT Convertible (Too Many Mods)
2003 Ford Mustang GT Convertible (Too Many Repairs - Wife's D/D)
2006 Vulcan 750
Purchased 05/17 8900 miles

R/R Relocated
Voltmeter/USB Charging
K&N Air Filters
Spline Lube
Pirelli MT66 Tires Balanced w/Ride-On
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post #4 of 5 (permalink) Old 06-11-2017, 07:30 AM
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You can find the oem o-rings here.
Kawasaki Motorcycle Parts 1999 VN750-A15 Vulcan 750 FUEL TANK (VN750-A15-A18) Diagram

'99 VN750, all stock
performed driveshaft maintenance
checked the ACCT using the Grambo Trick
Sycned carbs with flow meter
Yuasa YTX14AHL-BS AGM Battery
NGK DPR7EIX-9 Irridium Spark Plugs
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post #5 of 5 (permalink) Old 06-13-2017, 01:29 AM Thread Starter
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Thanks! Ordering two now

Also ordered a missing handlebar bolt and caps!

<- Slow Down, Move Over ->
Hookin' Ain't Easy

Current Rides
2013 F550 XLT 6.7 Powerstroke (Tow Truck)
2002 Ford Mustang GT Convertible (Too Many Mods)
2003 Ford Mustang GT Convertible (Too Many Repairs - Wife's D/D)
2006 Vulcan 750
Purchased 05/17 8900 miles

R/R Relocated
Voltmeter/USB Charging
K&N Air Filters
Spline Lube
Pirelli MT66 Tires Balanced w/Ride-On

Last edited by Golf; 06-13-2017 at 02:12 AM.
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