Suzuki ATV Forum banner

OEM vs Aftermarket vs Chinese (Carburetors)

18K views 13 replies 6 participants last post by  John1960  
Unfortunately, not all OEM carbs are able to be rebuilt. I bought a good looking 1990 suzuki ATV but someone has been in the carb before me and the main jet just spins in the tube. I will have to cut the tube and remove it to get the jet out and that will completely ruin the carb. There's also a tear in the diaphragm and while there are aftermarket diaphragms available, they often don't fit right. Suzuki wants close to $200 for their diaphragm/slide combo which is highway robbery. Buying a used carb off ebay or somewhere similar is a crap shoot and most carbs are going to be north of $150 for a complete take off that may or may not work. When you are only spending $500 on the ATV, that's a lot of cash for a carb that will need rebuilt. I wish there was a higher quality 3rd party solution available. I just bought a cheap chinese knockoff carb and then the correct size mikuni jets to fit it (it was jetted for a 500 cc suzuki), and hope I can get it dialed in correctly. I already drilled out the choke fitting a bit and the throttle boss fitting to allow for the throttle cable to seat correctly.
 
Good luck with it. Some members report success. Others have underweight doorstops when they can’t get it to run properly.

Let us know how it works for you
I'm going to be working on this quad again this weekend. Do you have any tips or advice on how to get the main jet out when it just spins in the tube? I would like to get the emulsion tube out to fully clean, but think I will have to destroy the white plastic tube the main jet and emulsion tube ride in. Is that white tube replaceable? Like you, I'd like to stay working with the original carb and haven't tried the chinese one yet.
 
What carb is it? Some have key ways , some are held in with friction.
This is off a 1990 SUZUKI LT-F250T CARBURETOR MODEL L
1990 Suzuki LT-F250T Carburetor (Model L/M/N/P/R/S/T) | Babbitts Suzuki Parts House

I'd like to get parts 6, 16, and 17 out but can't because the main jet just spins in the plastic tube. I have an erratic idle which is not due to air leakage around the carb, but without being able to physically get those parts out, I wonder if some of the holes in the emulsion tube or jet needle as they call it, part 6, are plugged and not atomizing the fuel/air correctly. Using an ultrasonic cleaner, I've soaked and soaked and cleaned and soaked the carb and ensured the pilot jet is clean and clear, but the idle is still erratic.
 
This is off a 1990 SUZUKI LT-F250T CARBURETOR MODEL L
1990 Suzuki LT-F250T Carburetor (Model L/M/N/P/R/S/T) | Babbitts Suzuki Parts House

I'd like to get parts 6, 16, and 17 out but can't because the main jet just spins in the plastic tube. I have an erratic idle which is not due to air leakage around the carb, but without being able to physically get those parts out, I wonder if some of the holes in the emulsion tube or jet needle as they call it, part 6, are plugged and not atomizing the fuel/air correctly. Using an ultrasonic cleaner, I've soaked and soaked and cleaned and soaked the carb and ensured the pilot jet is clean and clear, but the idle is still erratic.
I've already cleaned out the tank, put on a new petcock, and new external fuel filter and fuel pump as well.