My '86 ATC 250R bogs down/cuts out in heavy throttle.

[250rawR]

It rides just fine until I give it a lot of gas, where it then sort of sputters, cutting in and out. I just let off throttle a little and it cruises fine again. It never used to do this before I stored it last winter.

Anybody know what it's caused by?

Anyone in Seattle willing to come clean my carburetor? Since I have no experience with them, I don't wanna take a chance of ruining mine.

[gus]

Sounds like jetting issues that your running rich have you messed with the carb at all?

[250rawR]

Nah, I did not, BUT that's not to say my lil brother didn't mess with it when I was gone...

[gus]

Do you now your jet size in the carb if its to big it will bog down

[gus]

Does it feel like a heavy bog? Like when your at w.o.t and it feels like dying or want to shut off? Could possible be restricted gas flow

[RIDE-RED 250r]

You stated it ran fine till it sat all last winter. I bet you need to give your carb a good thorough cleaning. Sounds like it's leaning out on top end due to a fouled carb

[sp8twn]

Sounds like its been parked for a while!!?? I would give the carb a good cleaning and take it from there!

[gus]

Or you can clean the carb and see what happens lol instead of messing with the jets sounds easier haha

[250rawR]

I donno what size carb's in it, but I did replace the piston with a slightly larger (.025 over) one last year. Seemed to run fine since that though.

And yea, it does seem to bog pretty heavily like it wants to die.

[RIDE-RED 250r]

If it ran fine before storage and nothing was changed with jetting, then it's 99% likely you have a fouled carb. If you don't address it, you will likely be putting another new top end in it soon.

[gus]

DO you now how to clean a carb out?

[250rawR]

How's the best way to clear it out?

[Mack]

I agree with cleaning the carb. Hopefully you have fresh gas in it as well. Personally I would make sure the fuel line, petcock and filter are clean too.


If it ran fine before storage and nothing was changed with jetting, then it's 99% likely you have a fouled carb.

I'm with this thought too.

[250rawR]

I'll check the tank and the line, but I didn't even know these had a fuel filter. The air filter's clean.

[gus]

Have to take your carb off. there is 4 screws on the bottom of the carb unscrew those and take off the bowl slowly you'll see the plastic floats inside make sure you don't loose that small pin that holds the floats in place because when I clean mine it comes out. Get some carb cleaner and spray all off the holes out. I would use a hole can just to make sure its all cleaned out

[gus]

The only fuel filter there is if you put one on it connects to the fuel lines

[Mack]

Get a manual here http://www.3wheelerworld.com/showthread.php/56218-Get-your-trike-service-manuals-here!-Updated-9-13-07

Remove the carb as directed in the manual. Remove the slide and float bowl. Spray everything inside liberally with carb cleaner, including all channels and passageways in the carb. Blow compressed air through all passageways and jets and remove any gummy buildup. Put it back together and ride.

[Mack]

The only fuel filter there is if you put one on it connects to the fuel lines

My 2nd gen has one in the tank that slides into the petcock. Just assumed the 3rd gens do too.

[gus]

Really? I have to stick my head in the gas tank to see if I have one lol wow learn something everyday :lol:

[RIDE-RED 250r]

Get a manual here http://www.3wheelerworld.com/showthread.php/56218-Get-your-trike-service-manuals-here!-Updated-9-13-07

Remove the carb as directed in the manual. Remove the slide and float bowl. Spray everything inside liberally with carb cleaner, including all channels and passageways in the carb. Blow compressed air through all passageways and jets and remove any gummy buildup. Put it back together and ride.


I'll add to this, a toothbrush will come in handy for scrubbing the stubborn varnish from the jets. Be sure both jets are clean and clear 100%. Also make certain each fuel circuit the jets screw in to are clean and clear as well. Check by applying compressed air to each circuit with the jets removes. Verify good unobstructed airflow.. TIP: safety glasses highly recommended when you start spraying carb cleaner and applying compressed air to the carb.

[250rawR]

Anyone in Seattle willing to come help with my carburetor? Since I have no experience with them, I don't wanna take a chance of ruining mine.