Idles on choke, but dies when you give it gas

bbrook · 02-04-2012, 01:09 PM

I have a 2006 KFX400 stock, sat up for a year. I cleaned/drained the bowl, and all 3 jets in the bottom of the carborator. It starts and idles fine on choke, but dies out or boggs way down when more than 1/4 gas is applied? Any ideas?

atv4life95 · 02-04-2012, 01:17 PM

Carbs still dirty. You have to really clean out the carb to get every last piece of varnish and dirt out of it, otherwise you'll be stuck in the position you are now.

Hughesc99 · 02-04-2012, 01:52 PM

Can you see through your pilot jet? Like mentioned, sounds like something is still dirty.

Fuel screw still in stock position? Jet kit?

40calPUNISHER · 02-07-2012, 10:08 PM

Mine was doing the same thing, ran fine on choke but would die if taken off. Clean the crap out of your carb.

Pulido221 · 02-07-2012, 10:15 PM

Did you drain the year old gas out of the tank or did you leave it in and still running it? If you didn't, it's the gas... If its new gas, then check the jets again, make sure the choke isn't stuck, and check the air filter

02-04-2012, 01:09 PM	#1 (permalink)
bbrook :::Rookie Rider::: Join Date: Feb 2012 Posts: 1	Idles on choke, but dies when you give it gas I have a 2006 KFX400 stock, sat up for a year. I cleaned/drained the bowl, and all 3 jets in the bottom of the carborator. It starts and idles fine on choke, but dies out or boggs way down when more than 1/4 gas is applied? Any ideas?

02-04-2012, 01:17 PM	#2 (permalink)
atv4life95 :::LT500 Rider::: Join Date: May 2011 Location: Westchester NY Posts: 1,245	Carbs still dirty. You have to really clean out the carb to get every last piece of varnish and dirt out of it, otherwise you'll be stuck in the position you are now. __________________ 2003 Suzuki Z400 - SOLD Fully Worked & Race Ready, '98 Yamaha YZ125 - My New Toy

02-04-2012, 01:52 PM	#3 (permalink)
Hughesc99 :::Post Whore::: Join Date: Aug 2010 Location: Derby, KS Posts: 2,115	Can you see through your pilot jet? Like mentioned, sounds like something is still dirty. Fuel screw still in stock position? Jet kit? __________________ 2006 Lt-Z434 Trinity IV Full Exhaust/OSHC/FCR39 w/AP Safety Wired/ Velocity Intake/Odi Rogue Grips/AC Nerfs Factory Suzuki Heel Guards/Durablue Rear Linkage +2+1 A-Arms

02-07-2012, 10:15 PM	#5 (permalink)
Pulido221 :::Post Whore::: Join Date: Jul 2010 Location: Fresno, Ca Posts: 2,341	Did you drain the year old gas out of the tank or did you leave it in and still running it? If you didn't, it's the gas... If its new gas, then check the jets again, make sure the choke isn't stuck, and check the air filter __________________ Houser +2 a arms ( tric trac ) ProArmor nerfs,bump,grab bar Renthal Fat Bars ( magrath ) Houser +2 antivibe steer stem Fox Podium X front shocks TCS MX rear shock ASV unbreakable levers Full Curtis Sparks exhaust Dyno jet kit/FCI intake Old style hot cams Int/Ex ITP GNCC tires +2 GForce hubs Quadtech carbon fiber hood Kfx450R Monster graphic kit 450 BBK 13.1 JE piston KB valves / DRZ springs Mild ported head by me " WEAR A DAMN HELMET "

02-07-2012, 10:08 PM	#4 (permalink)
40calPUNISHER :::Rookie Rider::: Join Date: Feb 2012 Posts: 25	Mine was doing the same thing, ran fine on choke but would die if taken off. Clean the crap out of your carb.

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