"Popping" noise when starting

jsmeltser · 09-18-2008, 08:34 AM

I have a 2008 GZ250 that I've put 3500 miles on this summer. Lately, when I start from a cold start there is a loud popping noise that seems to come from the front of the bike and then when I give the bike gas I get the same sound until it warms up. Sorry I can't describe this any better. I'm going to take the bike in for the 3000 mile service but my local dealer is a complete douche so I'm not terribly confident with them. Any ideas?

Easy Rider · 09-18-2008, 09:30 AM

Quote:

Originally Posted by jsmeltser

I have a 2008 GZ250 that I've put 3500 miles on this summer. Lately, when I start from a cold start there is a loud popping noise that seems to come from the front of the bike and then when I give the bike gas I get the same sound until it warms up.

Could it be just the pipes heating up and expanding? Hope so.
If that's what it is, your header bolts might be a little loose.
If you check them, be careful; they should just be snug, not TIGHT.

jsmeltser · 09-21-2008, 03:47 AM

That was my first thought as well. I tightened them up a bit and the sound did seem to go away for a day or two, but it's back now. I'll report back after the service...

El Diablo · 10-08-2008, 10:13 AM

Is it popping or pootting. Could it be coming from your carburetor. My old Yamaha 350 Big Bear will get out of kilter every once in a while and will register a loud poot, kind of like a back fire, only it is more like a front fire.

jsmeltser · 10-08-2008, 04:09 PM

lol, I'm not sure if it's a 'poot' or a pop, but I definitely describe it as a 'front-fire'.

Easy Rider · 10-08-2008, 11:09 PM

Quote:

Originally Posted by jsmeltser

lol, I'm not sure if it's a 'poot' or a pop, but I definitely describe it as a 'front-fire'.

I just don't know about you young rookies...........

A real back fire comes BACK through the carb. That is why it is called a BACK fire.
What is now commonly called a backfire really isn't; it is an AFTER fire.....in the exhaust system.

EDIT: OK, that really isn't right either. One just needs to distinguish between an exhaust backfire and an intake backfire......which has all but disappeared with widespread use of fuel injection.

Brought to you by a charter member of the old farts club ! :crackup

patrick_777 · 10-08-2008, 11:40 PM

Quote:

Originally Posted by Easy Rider

Brought to you by a charter member of the old farts club ! :crackup

Thus, he is VERY familiar with things that make "poot" sounds.

Easy Rider · 10-09-2008, 10:09 AM

[quote=patrick_777]

Quote:

Originally Posted by "Easy Rider":yn9k0031

Brought to you by a charter member of the old farts club ! :crackup

Thus, he is VERY familiar with things that make "poot" sounds.[/quote:yn9k0031]

:shocked: :neener: :skull:

Quimrider · 10-13-2008, 02:33 PM

My 2000 with just under 10,000 miles makes a poot from the front of the engine when I start. The head gasket appears to have developed a leak. It is a very unusual sound. It has been doing it for a while, I just ignored it. Last Friday when leaving work. I noticed a small puff of smoke accompanied the sound from the front of the engine. It took what seemed like a dozen restarts to figure out where it was coming from. That could be the prob. but I would doubt it on such a new bike.

jsmeltser · 10-13-2008, 04:50 PM

Well I've FINALLY got my service scheduled, so hopefully the mystery of the poot will come to a close.

09-18-2008, 08:34 AM	#1
jsmeltser Junior Member Join Date: Jul 2008 Location: Fort Madison, Iowa Posts: 10	"Popping" noise when starting I have a 2008 GZ250 that I've put 3500 miles on this summer. Lately, when I start from a cold start there is a loud popping noise that seems to come from the front of the bike and then when I give the bike gas I get the same sound until it warms up. Sorry I can't describe this any better. I'm going to take the bike in for the 3000 mile service but my local dealer is a complete douche so I'm not terribly confident with them. Any ideas? Login or Register to Remove Ads
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09-21-2008, 03:47 AM	#3
jsmeltser Junior Member Join Date: Jul 2008 Location: Fort Madison, Iowa Posts: 10	Re: "Popping" noise when starting That was my first thought as well. I tightened them up a bit and the sound did seem to go away for a day or two, but it's back now. I'll report back after the service... Login or Register to Remove Ads
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10-08-2008, 10:13 AM	#4
El Diablo Member Join Date: Jun 2008 Location: Memphis TN Posts: 65	Re: "Popping" noise when starting Is it popping or pootting. Could it be coming from your carburetor. My old Yamaha 350 Big Bear will get out of kilter every once in a while and will register a loud poot, kind of like a back fire, only it is more like a front fire. __________________ El Diablo "If there are no dogs in heaven, then I want to go where they went" Will Rogers
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10-08-2008, 04:09 PM	#5
jsmeltser Junior Member Join Date: Jul 2008 Location: Fort Madison, Iowa Posts: 10	Re: "Popping" noise when starting lol, I'm not sure if it's a 'poot' or a pop, but I definitely describe it as a 'front-fire'. Login or Register to Remove Ads
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10-13-2008, 02:33 PM	#9
Quimrider Senior Member Join Date: Jun 2007 Location: Toledo, OH Posts: 198	Re: "Popping" noise when starting My 2000 with just under 10,000 miles makes a poot from the front of the engine when I start. The head gasket appears to have developed a leak. It is a very unusual sound. It has been doing it for a while, I just ignored it. Last Friday when leaving work. I noticed a small puff of smoke accompanied the sound from the front of the engine. It took what seemed like a dozen restarts to figure out where it was coming from. That could be the prob. but I would doubt it on such a new bike.
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10-13-2008, 04:50 PM	#10
jsmeltser Junior Member Join Date: Jul 2008 Location: Fort Madison, Iowa Posts: 10	Re: "Popping" noise when starting Well I've FINALLY got my service scheduled, so hopefully the mystery of the poot will come to a close.
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