Is it possible to adjust the float height on a 250es/sx/trx?

[swampthang]

I have a problem going on with the carb on my 250. I beleive the fuel height is too high in the bowl. It refuses to idle more then a few seconds before dieing and smells gassy. If I shut the fuel off it will rev up(lean out) I can make it idle like that by turning the gas on for a second then shuting it off till it starts to rev then turning it back on. When I took the carb apart to clean it I noticed the float had to be raised almost all the way up to stop fuel flow. I looked in the manual and it says it cant be adjusted. Is there a way to adjust it though. maybe bend it alittle? has anyone done this. I just down want to break the float.

[dougspcs]

Before tearing into your float, double check your choke plunger is seating properly.

I've had similar issues in the past and when I removed the choke plungers it's all clogged with crap..it's like running with the choke part way on.

Clean it, the bore and then lightly lube the plunger with some synthetic based greased.

[Flyingw]

The book is correct swampthang, the float height is fixed. Good call by Doug. Be sure the choke barrel is seated, the seat is clean and it moves freely. If you need a float, I have several but I also have freshly rebuilt ES/SX carbs for sale. Allot of guys have been having carb problems with their ES/SX lately so I have been gathering carbs and rebuilding them. I've got four on the shelf now. They have been bead blasted, cleaned, carb kit installed, cold start mod done (if applicable), and installed on my SX and run to verify operation. They are good to go. If interested, they are 100.00 with exchange. 125.00 without exchange. I dont send carbs out if they dont work right. The offer is there if you need one.

[tri again]

Great advice.
Be careful getting the choke plunger out if it is stuck.
There are 2 thin metal tabs that hold the plunger to the cable
and if they bend or break there is almost no happy end to the story.
Search key mentions something about a milling machine to 'drill' them out.

I also had one carb kit with 2 different length float needles.
Not sure if that was one way to change fuel levels or just wrong parts.

On a side note, my uncle used to hook a piece of clear fuel line to the
float bowl drain and hold the tubing up against the carb body.
That can give an idea of the fuel level inside the float bowl.

Usually somewhere near the junction of the float bowl and carb body.

[swampthang]

The choke works fine. I took the carb off again and was able to bent the float down alittle. It seems to have helped it out some. For some odd reason the drain screw does nothing. I have taken it out and it still doesnt drain the bowl. The overflow works fine though.

[tri again]

The choke works fine. I took the carb off again and was able to bent the float down alittle. It seems to have helped it out some. For some odd reason the drain screw does nothing. I have taken it out and it still doesnt drain the bowl. The overflow works fine though.

Yupp, main drain is the perfect place for superfine rust dust to plug stuff up.
I like having them functional so they are easy to drain for storage.

Too bad those carbs as such a project to get off and back on.

[Flyingw]

When I rebuild these carbs, I do install them on my SX and run them so I have put in and taken these things out many many times. There is a secret. Turn the carb 90 deg to the right (CW). Unhook the throttle cable from the backbone hook. Lift and gently twist the carb back and forth as you bring it up through the frame. It will come right out even with the vent hoses on it.

[swampthang]

Yupp, main drain is the perfect place for superfine rust dust to plug stuff up.
I like having them functional so they are easy to drain for storage.

Too bad those carbs as such a project to get off and back on.

This carb I'm working with is on a 86 trx. It comes off pretty easy I can have it off the bike in prolly 5 minutes. I've had a 250es and sx but I dont remember if they was a PITA or not to get out.

[Flyingw]

The ES carbs are easy to get off but the SX carbs barely fit through the frame.