Honda XR 50 Idle-up

Joshawajc · 03-09-2008, 06:30 PM

My son has an XR 50 thats having trouble. It starts fine, but after about 30-40 seconds,the idle revs high until it spits gas out the overflow,idles back down and dies.It was running fine until my son rode up and I noticed gas coming from overflow tube and high idle.I know carb problems can cause "choke-out", but I'm not sure about the "idle-up". Any input would be appreciated. Thanks, Josh

turtlemann14 · 03-09-2008, 06:52 PM

have you checked the carb?
this makes me think that the float is stuck open...

Joshawajc · 03-09-2008, 07:03 PM

I pulled off the bowl, and cleaned it,sprayed out the carb, and replaced an o-ring @ the carb. It changed nothing.You can ride it, but when you stop the idle comes up etc.. etc.. Maybe I need to pull the carb all the way out and clean.Have you heard of a carb problem causing it to idle-up?

turtlemann14 · 03-09-2008, 07:14 PM

yea a leak after the carb letting more air in... have you checked the rubber boot that holds it to the engine?
but i don't know how that would make excess fuel flow out if the float was working properly...

gscx · 03-09-2008, 07:22 PM

you have to adjust the float level using the tab buy the rod that holds the foat on there, its very sensitve so adjust it in small increments

Joshawajc · 03-09-2008, 07:32 PM

The plastic piece in front of the carb seems o.k. there is also an o-ring on that piece that seems o.k. The o-ring @ the carb was torn,so I thought that would be the fix, but "no dice".I dont know alot about dirt bikes, so thats as far as I've gone.

Joshawajc · 03-09-2008, 07:35 PM

what is the tab? this will be my first time to open up a carb.Do you think the float would cause it to idle up?

turtlemann14 · 03-10-2008, 01:38 PM

the tab should have a little spring or wire attached to it to pull the float's needle valve back out the tab should be between the two floats near the hinge

i don't know if the engine would rev up if it was running rich from high fuel levels (which would cause the over flow of gas)

for it to rev up i would think that there would have to be air getting in somewhere...

03-09-2008, 06:30 PM	#1 (permalink)
Joshawajc C Rider Join Date: Mar 2008 Posts: 13	Honda XR 50 Idle-up My son has an XR 50 thats having trouble. It starts fine, but after about 30-40 seconds,the idle revs high until it spits gas out the overflow,idles back down and dies.It was running fine until my son rode up and I noticed gas coming from overflow tube and high idle.I know carb problems can cause "choke-out", but I'm not sure about the "idle-up". Any input would be appreciated. Thanks, Josh

03-09-2008, 06:52 PM	#2 (permalink)
turtlemann14 Pro Mototips Member Join Date: Oct 2007 Location: West Virginia Posts: 3,720	have you checked the carb? this makes me think that the float is stuck open... __________________ If it does not move at first, get a bigger hammer!! Myspace Kawasaki z1 900 1973 rake extended, big bore block 1127cc, carbs, straight pipe exhaust, coils, and new paint job Kawasaki klx250 1979 custom fiberglass silencer+ Honda xr200r 1985 stock = Dakaw Dk250 2008

03-09-2008, 07:03 PM	#3 (permalink)
Joshawajc C Rider Join Date: Mar 2008 Posts: 13	I pulled off the bowl, and cleaned it,sprayed out the carb, and replaced an o-ring @ the carb. It changed nothing.You can ride it, but when you stop the idle comes up etc.. etc.. Maybe I need to pull the carb all the way out and clean.Have you heard of a carb problem causing it to idle-up? Last edited by Joshawajc; 03-09-2008 at 07:12 PM.

03-09-2008, 07:14 PM	#4 (permalink)
turtlemann14 Pro Mototips Member Join Date: Oct 2007 Location: West Virginia Posts: 3,720	yea a leak after the carb letting more air in... have you checked the rubber boot that holds it to the engine? but i don't know how that would make excess fuel flow out if the float was working properly... __________________ If it does not move at first, get a bigger hammer!! Myspace Kawasaki z1 900 1973 rake extended, big bore block 1127cc, carbs, straight pipe exhaust, coils, and new paint job Kawasaki klx250 1979 custom fiberglass silencer+ Honda xr200r 1985 stock = Dakaw Dk250 2008

03-09-2008, 07:22 PM	#5 (permalink)
gscx Pro Mototips Member Join Date: Aug 2007 Location: bridgeville DE Posts: 2,080	you have to adjust the float level using the tab buy the rod that holds the foat on there, its very sensitve so adjust it in small increments __________________ 2004 YZ-125 - PC exhaust, Blue applied triple tree, blue turner OV bars, ASV levers, Sunline sprocket and gold chain, FC springs, white plastic . DONT MESS WITH ME, I HAVE A HAMMER AND WILL USE IT!!!!!

03-09-2008, 07:32 PM	#6 (permalink)
Joshawajc C Rider Join Date: Mar 2008 Posts: 13	The plastic piece in front of the carb seems o.k. there is also an o-ring on that piece that seems o.k. The o-ring @ the carb was torn,so I thought that would be the fix, but "no dice".I dont know alot about dirt bikes, so thats as far as I've gone.

03-09-2008, 07:35 PM	#7 (permalink)
Joshawajc C Rider Join Date: Mar 2008 Posts: 13	what is the tab? this will be my first time to open up a carb.Do you think the float would cause it to idle up?

03-10-2008, 01:38 PM	#8 (permalink)
turtlemann14 Pro Mototips Member Join Date: Oct 2007 Location: West Virginia Posts: 3,720	the tab should have a little spring or wire attached to it to pull the float's needle valve back out the tab should be between the two floats near the hinge i don't know if the engine would rev up if it was running rich from high fuel levels (which would cause the over flow of gas) for it to rev up i would think that there would have to be air getting in somewhere... __________________ If it does not move at first, get a bigger hammer!! Myspace Kawasaki z1 900 1973 rake extended, big bore block 1127cc, carbs, straight pipe exhaust, coils, and new paint job Kawasaki klx250 1979 custom fiberglass silencer+ Honda xr200r 1985 stock = Dakaw Dk250 2008

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