951 carb issues half throttle

[number5]

Rebuilt carb twice now and still doing the same thing. It only accelerates to half throttle. I then have to pull push the choke to get it going.

 

[AdamXP800]

Do you still have the grey tempo fuel lines?
Did you clean or replace the fuel selector

 

[AdamXP800]

Do not ride the ski anymore. It is running lean and will destroy your engine if you haven't already

 

[number5]

Ya replaced lines and fuel selector is clean. Replacing the selector would do what?

 

[number5]

Its not running lean. I checked the plugs after every ride. Next

 

[SabrToothSqrl]

is it running rich?

post a pic of the plugs, what are the carb screws set to?

 

[number5]

no not rich. Idle screws are almost two turns out. I have turned them in and out. They only make a difference at idle. I switched carbs from other identical gtx and the problem stayed. Noticed tank relief not working so I replaced that. That did not make a difference either.

 

[SabrToothSqrl]

Well, if it's not the carbs, what's your compression reading?

 

[AdamXP800]

If the choke helps, how would that not indicate a lean condition?

 

[AdamXP800]

Did you clean the fuel selector like I SUGGESTED above?

 

[number5]

Compression 142 digital tescom gauge. Fuel selector CLEANED. I noticed if I feather the throttle it does the same thing as pulling the choke. I don't think it's fuel related any more. Just remembered on my 250r in a race it bogged idled fine thought it was my carb ended up being the cdi

 

[number5]

I'm going to first swap coils. Then mpem

 

[Mickirig1]

Check the fuel lines and your filter / water seperator and inline if you have one. Key is you switched carb's. Must be supply. Pulling choke makes a diff it may be a air leak somewhere. It's easier to suck air then gas. I just went thru this song and dance for the last month or so! Was a bad filter / water seperator gasket! Pressure test a section at a time ( line pincher ) till you find the leak.

 

[SabrToothSqrl]

Could also be the reeds. did you check them when you swapped the carbs?

 

[number5]

Ya I checked the reeds. I will check the filter next.

 

[number5]

I bypassed the filter and selector valve and no change. Tomorrow I will swap coils then epem.

 

[number5]

So now I have inline filter no selector valve and reserve connected to carb with inline filter. Decided to do the epem first. Something strange I swapped them and both ran terrible. So I swapped them back and the known good gtx ran great.