Help, bike runs like shiz!

Rider · 08-18-2010, 10:21 AM

Ok, at the beginning of the season I replaced the plugs, air filter, oil, tore down carbs and cleaned them. Bike ran great for a while and the last time I rode it, but now after sitting for about a month the bike wont idle, has poor acceleration and backfires when I close the throttle after maintaining cruising speed on the highway. Too rich? I probably need to replace the needle and seat on the carbs but after that I have no idea what to do next. Gas is fresh and I ran Seafoam to clean out the carbs. No luck.

Any suggestions are appreciated.

Particle Man · 08-18-2010, 10:32 AM

this may seem like a dumb suggestion (sorry) but if it's been sitting, check the airbox to make sure some critter hasn't built a home for itself in there... I know you said you replaced the air filter at the beginning of the season but didn't say if you checked it again recently... at my last place of residence, I let the bike sit for 2 weeks once and had similar issues. Turns out a mouse had made a home in the snorkle to the airbox...

shmike · 08-18-2010, 10:38 AM

Turn off the choke.

Rider · 08-18-2010, 10:39 AM

Quote:

Originally Posted by shmike

Turn off the choke.

It's off.

goof2 · 08-18-2010, 12:57 PM

What is the bike?

Amber Lamps · 08-18-2010, 01:07 PM

OIC you don't have time for us unless you need something....

I'd seriously check the air box, he's right about "critters"... Beyond that, pull the plugs and check if they are fouled. Look for a possible vacuum leak, perhaps a line fell off or had a crack that has gotten worse. Check, the fuel filter, I don't think you mentioned that. You haven't washed the bike recently have you? Sometimes water can get into connections at the ECU which can cause these problems. Especially if you have add on programmers... Make sure your plug wire connections are good and triple check that the choke isn't stuck open. Oh and if you have those carbs with the diaphragms on the side, make sure you don't have a hole in one of those.

Rider · 08-18-2010, 01:14 PM

Quote:

Originally Posted by goof2

What is the bike?

V-Star 650

Quote:

Originally Posted by Amber Lamps

OIC you don't have time for us unless you need something....

I'd seriously check the air box, he's right about "critters"... Beyond that, pull the plugs and check if they are fouled. Look for a possible vacuum leak, perhaps a line fell off or had a crack that has gotten worse. Check, the fuel filter, I don't think you mentioned that. You haven't washed the bike recently have you? Sometimes water can get into connections at the ECU which can cause these problems. Especially if you have add on programmers... Make sure your plug wire connections are good and triple check that the choke isn't stuck open. Oh and if you have those carbs with the diaphragms on the side, make sure you don't have a hole in one of those.

Didn't wash the bike, it's been under a bike cover for the last month. The bike is also bone stock. I'll pull the plugs tonight to check or color.

Particle Man · 08-18-2010, 03:07 PM

Quote:

Originally Posted by Rider

Didn't wash the bike, it's been under a bike cover for the last month.

Even more of a possibility of a miserible mouse in that case... ask me how I know

lauralynne · 08-18-2010, 03:15 PM

Quote:

Originally Posted by Rider

Ok, at the beginning of the season I replaced the plugs, air filter, oil, tore down carbs and cleaned them. .

I think I found your problem....

Rider · 08-18-2010, 03:19 PM

Quote:

Originally Posted by lauralynne

I think I found your problem....

Reading comprehension fail. I said it ran great after that? What is your fucking IQ? any idea sweetheart?

08-18-2010, 10:21 AM	#1
Rider Moto GP Star Join Date: Feb 2008 Posts: 12,156	Help, bike runs like shiz! Ok, at the beginning of the season I replaced the plugs, air filter, oil, tore down carbs and cleaned them. Bike ran great for a while and the last time I rode it, but now after sitting for about a month the bike wont idle, has poor acceleration and backfires when I close the throttle after maintaining cruising speed on the highway. Too rich? I probably need to replace the needle and seat on the carbs but after that I have no idea what to do next. Gas is fresh and I ran Seafoam to clean out the carbs. No luck. Any suggestions are appreciated.

08-18-2010, 10:32 AM	#2
Particle Man Custom User Title Join Date: Nov 2008 Location: Central NY Moto: 2003 SV650S Posts: 14,959	this may seem like a dumb suggestion (sorry) but if it's been sitting, check the airbox to make sure some critter hasn't built a home for itself in there... I know you said you replaced the air filter at the beginning of the season but didn't say if you checked it again recently... at my last place of residence, I let the bike sit for 2 weeks once and had similar issues. Turns out a mouse had made a home in the snorkle to the airbox... __________________ I'm not "fat." I'm "Enlarged to show texture." Handle every stressful situation like a DOG: If you can't eat it or hump it, pi$$ on it & walk away.

08-18-2010, 10:38 AM	#3
shmike Follower Join Date: Nov 2008 Posts: 5,549	Turn off the choke. __________________ Racing For Smiles

08-18-2010, 12:57 PM	#5
goof2 AMA Supersport Join Date: Feb 2009 Posts: 4,756	What is the bike?

08-18-2010, 01:07 PM	#6
Amber Lamps Moto GP Star Join Date: Mar 2008 Posts: 14,556	OIC you don't have time for us unless you need something.... I'd seriously check the air box, he's right about "critters"... Beyond that, pull the plugs and check if they are fouled. Look for a possible vacuum leak, perhaps a line fell off or had a crack that has gotten worse. Check, the fuel filter, I don't think you mentioned that. You haven't washed the bike recently have you? Sometimes water can get into connections at the ECU which can cause these problems. Especially if you have add on programmers... Make sure your plug wire connections are good and triple check that the choke isn't stuck open. Oh and if you have those carbs with the diaphragms on the side, make sure you don't have a hole in one of those.