Bike is running out of gas with a full tank

Message
Author
User avatar
noobie
Veteran
Veteran
Posts: 58
Joined: Thu Feb 10, 2011 3:43 pm
Sex: Female
Years Riding: 1
My Motorcycle: 2009 Honda Shadow Spirit

Bike is running out of gas with a full tank

#1 Unread post by noobie »

Hi all,
Just about to bring my bike into the shop - I really don't want to live without it for a few days - but I may not have a choice... It's a 2009 Shadow Spirit. It holds 3 gallons and runs out of gas every 40 or 50 miles. I have to turn the reserve on. It'll stop doing it for a while and then start up again.
Yesterday, it ran out with a full tank of gas. But, the reserve works.
Anybody have any ideas what's causing this?

Gas-less in Seattle,
Noobie

User avatar
BuzZz
Site Supporter - Platinum
Site Supporter - Platinum
Posts: 4726
Joined: Sat Mar 20, 2004 6:02 am
Real Name: Never Used Here
Sex: Male
Years Riding: 47
My Motorcycle: makes my 'nads tingle
Location: Buttfluck Nowhere, Manitoba

Re: Bike is running out of gas with a full tank

#2 Unread post by BuzZz »

It almost sounds like the gascap vent is plugged. Once a certain amount of fuel has been sucked out by the engine, there is more vacuum in the tank than the fuel pump can over come. Opening the cap should allow you to hear air rushing in. Then it's good until it builds up vacuum again.

If that isn't it, then it is probably a fuel pump problem (does that bike use a fuel pump, cuase I don't know). Could be an electrical problen to the pump, best to take it to the dealer for this.

If it doesn't have a fuel pump, then it's an engine vacuum/petcock issue, again best to let a dealer look it over.

One of those 3 things is likely the problem. The cap vent is the easiest to check yourself.
No Witnesses.... :shifty:

User avatar
noobie
Veteran
Veteran
Posts: 58
Joined: Thu Feb 10, 2011 3:43 pm
Sex: Female
Years Riding: 1
My Motorcycle: 2009 Honda Shadow Spirit

Re: Bike is running out of gas with a full tank

#3 Unread post by noobie »

Thanks Buzzzzzzz,
I think this is over my head - I've gotta bring it into the shop.

Peace Out,
Noobie

User avatar
noobie
Veteran
Veteran
Posts: 58
Joined: Thu Feb 10, 2011 3:43 pm
Sex: Female
Years Riding: 1
My Motorcycle: 2009 Honda Shadow Spirit

Re: Bike is running out of gas with a full tank

#4 Unread post by noobie »

Update: They (the shop) suspect the petcock... I should know in a couple days :/

Peace Out,
Noobie

Wrider
Site Supporter - Gold
Site Supporter - Gold
Posts: 5285
Joined: Wed Aug 16, 2006 7:46 pm
Real Name: Ryan
Sex: Male
Years Riding: 4
My Motorcycle: 2005 Kawasaki Z750S
Location: Colorado Springs, CO

Re: Bike is running out of gas with a full tank

#5 Unread post by Wrider »

It should be the petcock. For what it's worth on most petcocks there are two tubes that stick up into the fuel tank. One is taller than the other, and it's the one that sucks fuel down when the petcock is switched to "ON". The shorter one is for "Reserve". They usually both have a screen type filter over them. I'm guessing what happened is that yours had that screen filter plugged up, and when the fuel pressure on the screen wasn't enough to push sufficient fuel through, it ran out of gas, which would also explain why the reserve still worked.
Have owned - 2001 Suzuki Volusia
Current bike - 2005 Kawasaki Z750S
MMI Graduation date January 9th, 2009. Factory Certifications in Suzuki and Yamaha

User avatar
noobie
Veteran
Veteran
Posts: 58
Joined: Thu Feb 10, 2011 3:43 pm
Sex: Female
Years Riding: 1
My Motorcycle: 2009 Honda Shadow Spirit

Re: Bike is running out of gas with a full tank

#6 Unread post by noobie »

@Wrider,
That makes total sense :)
Is it a lot of work to fix something like that? The bike is still under warranty - I hope it's covered.

Peace Out,
Noobie

Wrider
Site Supporter - Gold
Site Supporter - Gold
Posts: 5285
Joined: Wed Aug 16, 2006 7:46 pm
Real Name: Ryan
Sex: Male
Years Riding: 4
My Motorcycle: 2005 Kawasaki Z750S
Location: Colorado Springs, CO

Re: Bike is running out of gas with a full tank

#7 Unread post by Wrider »

noobie wrote:@Wrider,
That makes total sense :)
Is it a lot of work to fix something like that? The bike is still under warranty - I hope it's covered.

Peace Out,
Noobie
Depends on if your shop likes you or not. Technically it probably wouldn't be covered, but if they like you it could easily be deemed as coverable.

As far as a lot of work to fix? Not at all. I'm sure you could do it without a problem!
Have owned - 2001 Suzuki Volusia
Current bike - 2005 Kawasaki Z750S
MMI Graduation date January 9th, 2009. Factory Certifications in Suzuki and Yamaha

Post Reply