Burning motor smell

Question edited for clarity.
Question moved from motorcycles to ATV model category.

Turning over has nothing to do with the carburetor! Your battery is flat. It will need charging.

If the carb is leaking, it is because the float is set wrong or the float valve needle isn't seating properly.

Engines only need three things to run.

A supply of clean fresh fuel (not sitting a year)
A Spark at the right time.
Compression.

You say you cleaned the carb **in** carb cleaner, as opposed to *with* carb cleaner. Did you strip it down, check the float for holes, clean the jets and needles?

Question edited for clarity. Add maker.
Question moved to Yamaha Bruin category.

Likely to be a fault with the ignition switch Karen. There is help in the link.

https://www.google.com/search?q=2004+Bruin+350+won%27t+switch+off

..

https://www.google.com/search?q=how+to+yurn+down+mixture+bruin+350&oq=how+to+yurn+down+mixture+bruin+350&aqs=chrome..69i57.19716j0j7&sourceid=chrome&ie=UTF-8

Is the new carb oem part or aftermarket? Could be running too lean.

there should be a screw located on the bottom of the float bowl. but on some quads it might not be easy to reach without long skinny flat head screwdriver. my suggestion is to take off the carb and give it a good cleaning. water can cause deposits and lead to clogs

speedo cable prob broke.

I am sure you have replaced the ground wire. Start checking everything from the battery on. Make sure all fuses are good. Sounds like it was jumped from a car, worse thing you can do especially it it is running. Could just be the coil. If not, cdi possible too. Are you getting power to all of your lights and everything now just no spark? If you can find a donor coil to check, make sure all of your grounds are good to the motor too. Google for testing specs on that model for the cdi.

Close to the battery on thr red wire in a plastic cylindrical fuse holder.

Main jet dirty. Likely Ethanol fuel fouling. Remove and clean jet. Check all rubber tubing to/from carb for cracks/deterioration and replace.

I am going to go with a few taps on the side of the carb around the bowl .. use the handle of a screwdriver .. it is mostlikely a stuck float.. if that doesn't fix it take the carb off pull the bowl look at the needle and seat make sure there isn't something keeping the needle from fitting snugly into the seat. Not sure if the tip of the needle is rubber or the seat it's self on this carb.. one or the other will be. Look for cracks in the rubber. If none I would try to re adjust the float setting ..