Help with an 85

[Fallacy]

Okay so, My carborator has been leaking, For 3 days ive had to pull it aprt clean it i find this weird nylon shit ive never seen before right? Ive takin it and blown it with an air hose and blah blah, Then a friend tells me to clean it out again, Blow it through the gas tube out this time, so i do so,And i was out the tank with gas, Then i put the carb. back on and the seat and plastics blah blah, I start it up, OH MY LORD ran better then ever, But the BAM! It shifts itself into a gear and take soff powerband all the way and slaps into a tree Ive double checked, I didn't mess the idle up the needlevalve is perfect, the throtle pull is same as always.. I don't know what to do, Just though i might be able to get an opinion! Help out! Before i run off anf buy a new carborator.

[MX86]

it has a mind of it's own!!!

i would first check the clutch wear and shifting mechanism
then for the WFO. make sure that the needle is sliding into the main jet

[lt250racer]

Check your throttle cable, some tend to stick in the winter, also if its old

[SHOWED UP]

I have a carb i will just give you off my 86 i dont need it anymore. let me know.