Hi, I'm a new FL350 owner. Bought this atv about two years ago but had nowhere to ride it, so it sat with intermittent startups (run it for five minutes every month, etc, put around the yard). Finally moved to a place with open land, so I repalced the spark plug, fuel filter, fuel lines, intake [reed] boot, both clutches, drive belt, and fuel cap. When i would run the odyssey, when the
Engine is cold, the thing had no power. itll top out at about 30mph. Thought the clutches were bad, so i replaced them with comet 94c's, but it didn't fix the issue. I discovered that if i run it for about 5-10 minutes, it warms up enough and makes the expected power. Trouble is, once it warms up, a new problem exists; if i get on it for more than a few seconds, it starts to choke/bog and backfires. If i let off the throttle, it usually doesn't stall, but sometimes i need to choke it to keep it running.
Checked the compression and it has 125psi on a cold Engine. That seems ok, right? The previous owner rebuilt the top end right before selling it. I took the carb apart multiple times and cleaned and set everything to standard settings. Jet need is set to notch #3, 142# main jet, 45 pilot jet. Air screw is set to 1.5 turns. Idle seems ok. Float is set to 16mm, float valve seems intact. Btw, I live at 0-1000ft elevation from sea level.
One thing i noticed is the pulse tube from the crank to the fuel pump is a little loose on the crank side. Even with a spring clamp, i can tug it off with one hand with a little force.
Also, not sure if i should clean out the fuel tank. I did notice a few rust flakes in the fuel filter.
Spark plug is a dark brown (im replacing it today). Suggests that its running too rich. Not sure why i need to choke it to keep it running at times though.
Based on teh fact that its slow when cold, and bogs/backfires when warmed up tell me something obvious? Btw, this is my first two stroke, so I'm learning as I go along. Any suggestions or help would be greatedly appreciated.