Idle, Choke, and Backfire?

2003gzsc · 05-13-2013, 10:16 AM

I have a 2003 GZ 250.

So on my way to work this morning my bike ran out of gas. I walked it .25 miles to a repair shop that doesn't sell gas. The guy gave me a gallon of 93 premium non-ethanol gas and I was on my way. Rode down the street to a gas station where I filled up on 93 premium non-ethanol gas.

Now, here is the problem I am having (I have never had this problem before and did not have it prior to today's events). 1) In order to keep my bike idling at a normal rpm, I have to have the choke open all the way. Otherwise, it will stall out. As I am riding I can close the choke and accelerate fine, but if I brake or slow down, the bike stalls out. I then have to open the choke all the way and and start it back up. 2) When the choke is fully open, it does not idle at a high rpm, but at a normal rpm as if the bike is warm and the choke is closed. 3) If I rev the bike while in neutral, it backfires once or twice as the rpms slow down.

Any idea what in the world is going on?

blaine · 05-13-2013, 11:01 AM

When you ran out of fuel you picked up some dirt in the pilot jet (idle jet).You may be able to clear it with a dose of SeaFoam & a inline filter would be a good investment to keep any dirt from getting to the carb.

:cool:

2003gzsc · 05-13-2013, 11:15 AM

Thanks!

Do I need to add SeaFoam to an empty tank of gas and then fill up? Or can I add it now while the tank is full?

Fawlty · 05-13-2013, 12:35 PM

Quote:

Originally Posted by 2003gzsc

Or can I add it now while the tank is full?

Yes.

2003gzsc · 05-13-2013, 12:37 PM

Thanks so much guys!

Water Warrior 2 · 05-15-2013, 07:38 PM

Go back to using 87 octane gas. The GZ neither needs or likes the 93 octane to be healthy.

05-13-2013, 10:16 AM	#1
2003gzsc Junior Member Join Date: Jun 2012 Location: South Carolina Posts: 11	Idle, Choke, and Backfire? I have a 2003 GZ 250. So on my way to work this morning my bike ran out of gas. I walked it .25 miles to a repair shop that doesn't sell gas. The guy gave me a gallon of 93 premium non-ethanol gas and I was on my way. Rode down the street to a gas station where I filled up on 93 premium non-ethanol gas. Now, here is the problem I am having (I have never had this problem before and did not have it prior to today's events). 1) In order to keep my bike idling at a normal rpm, I have to have the choke open all the way. Otherwise, it will stall out. As I am riding I can close the choke and accelerate fine, but if I brake or slow down, the bike stalls out. I then have to open the choke all the way and and start it back up. 2) When the choke is fully open, it does not idle at a high rpm, but at a normal rpm as if the bike is warm and the choke is closed. 3) If I rev the bike while in neutral, it backfires once or twice as the rpms slow down. Any idea what in the world is going on? Login or Register to Remove Ads
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05-13-2013, 11:01 AM	#2
blaine Senior Member Join Date: Feb 2010 Location: P.E.I. Canada Posts: 3,784	Re: Idle, Choke, and Backfire? When you ran out of fuel you picked up some dirt in the pilot jet (idle jet).You may be able to clear it with a dose of SeaFoam & a inline filter would be a good investment to keep any dirt from getting to the carb. :cool: __________________ If at first you do succeed, try not to look surprised.
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05-13-2013, 11:15 AM	#3
2003gzsc Junior Member Join Date: Jun 2012 Location: South Carolina Posts: 11	Re: Idle, Choke, and Backfire? Thanks! Do I need to add SeaFoam to an empty tank of gas and then fill up? Or can I add it now while the tank is full? Login or Register to Remove Ads
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05-13-2013, 12:37 PM	#5
2003gzsc Junior Member Join Date: Jun 2012 Location: South Carolina Posts: 11	Re: Idle, Choke, and Backfire? Thanks so much guys! Login or Register to Remove Ads
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05-15-2013, 07:38 PM	#6
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	Re: Idle, Choke, and Backfire? Go back to using 87 octane gas. The GZ neither needs or likes the 93 octane to be healthy.
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