Vstar 1100 vapor locking problem - Motorcycle-Journal Forums

Jerzigirl · 04-17-2008, 11:25 PM

Hello everyone! I am JerziGirl. I have a problem and am hopeing someone has an answer for me. My 2004 vstar 1100 silverado is vapor locking on me. It has stalled already on me while riding and has had trouble starting. I discovered that when I take the gas cap off it releases pressure and then will start right up for me. It will run fine for awhile until builds up pressure again. The cap I have now is new and I was told is ventless so pretty sure it's not my cap. Please help. Thanx!
Jerzigirl

themeatmanlandry · 04-18-2008, 10:19 AM

Is there a stopped up tube coming from teh bottom of the tank?

The reason I ask is because my Bandit (and I think my GSXR too) has an overflow tube and a vent tube (I think) coming from the bottom of the tank. One of yours may be stopped up?

I'm guessing here, so bear with me.

Easy Rider · 04-18-2008, 09:10 PM

Quote:

Originally Posted by themeatmanlandry

The reason I ask is because my Bandit (and I think my GSXR too) has an overflow tube and a vent tube (I think) coming from the bottom of the tank. One of yours may be stopped up?

I'm guessing here, so bear with me.

That pretty much HAS to be the problem; a plugged vent. If it is not in the cap, then the main problem is finding out where it IS.

P.S. The condition you describe is NOT vapor lock. That is a whole different problem.

omegajim · 04-18-2008, 09:14 PM

if this yamaha operates in the way I believe it does, most likely the vacuum line from the engine to the tank.

Being 4 - 5 years old, there could be a crack in the vacuum line, or a loose connection on either end of the hose. Usually the connectors on the hose (factory original) are the cheapest darn things around that you need to replace with decent bought from your local hardware store hose clamps.

could be just that simple.

2005GZ250 · 04-18-2008, 10:11 PM

Quote:

Originally Posted by Easy Rider

P.S. The condition you describe is NOT vapor lock. That is a whole different problem.

The problem is a vacuum is building in the tank because there is no venting, could be a hose, vent valve etc. Look at the fuel tank diagram, part #49 it is a vent valve. The diagram is poor so it's hard to tell how it's hooked up.

2004 Yamaha Motorcycle Parts for XVS11ATS V STAR 1100 SILVERADO, OEM and Aftermarket at BikeBandit.com

2005GZ250 · 04-18-2008, 10:37 PM

The diagram on this site is much better:

Highlands Yamaha | Yamaha OEM Parts

PS You will need to put in your bike info and then go to the fuel tank diagram.

04-17-2008, 11:25 PM	#1 (permalink)
Jerzigirl Newbie Joined: Apr 2008 Bike: Yamaha Vstar 1100 Silverado Location: Ashland City, Tn Posts: 1	Vstar 1100 vapor locking problem Hello everyone! I am JerziGirl. I have a problem and am hopeing someone has an answer for me. My 2004 vstar 1100 silverado is vapor locking on me. It has stalled already on me while riding and has had trouble starting. I discovered that when I take the gas cap off it releases pressure and then will start right up for me. It will run fine for awhile until builds up pressure again. The cap I have now is new and I was told is ventless so pretty sure it's not my cap. Please help. Thanx! Jerzigirl

04-18-2008, 10:19 AM	#2 (permalink)
themeatmanlandry Happy-ass Lunatic Joined: Dec 2003 Bike: 2002 Bandit 600S (Black); 2006 GSXR750 (Black) Location: Memphis Posts: 11,423	Is there a stopped up tube coming from teh bottom of the tank? The reason I ask is because my Bandit (and I think my GSXR too) has an overflow tube and a vent tube (I think) coming from the bottom of the tank. One of yours may be stopped up? I'm guessing here, so bear with me. __________________ Go to hell

04-18-2008, 09:14 PM	#4 (permalink)
omegajim M-J.Com Lifetime Achievement Award Joined: Jan 2007 Bike: 1980 Yamaha XS850 Location: Washington County, WI Posts: 6,464	if this yamaha operates in the way I believe it does, most likely the vacuum line from the engine to the tank. Being 4 - 5 years old, there could be a crack in the vacuum line, or a loose connection on either end of the hose. Usually the connectors on the hose (factory original) are the cheapest darn things around that you need to replace with decent bought from your local hardware store hose clamps. could be just that simple. __________________ "FREE TIBET!"* With purchase of one Tibet of equal or greater value.

04-18-2008, 10:37 PM	#6 (permalink)
2005GZ250 Fender Buffer Joined: Sep 2005 Bike: 2005 GZ250 1973 "heavyoldandslow" GT750 Location: Roland, AR Posts: 432	The diagram on this site is much better: Highlands Yamaha \| Yamaha OEM Parts PS You will need to put in your bike info and then go to the fuel tank diagram. __________________ I only ride 'em. I don't know what makes 'em work. Oddball: Donald Sutherland, Kelly's Heroes 1970 Last edited by 2005GZ250; 04-18-2008 at 10:41 PM.

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