Need help! King quad isnt running right
I got a king quad from a friend, for free. Has been treated so bad its hole life it was barely worth taking for free. But now I want it to run! Now that I have it I need it to run well atleast.
Problems I have been having,
It seems to have no clutch and I dont know if thats normal. When I put it in gear I almsot do a wheelie cause its just getting slammed into gear and thats how they have been doing it forever.
Engine: It doesnt get above 25 mph. Sounds bad, backfires, smokes, has a hissing sound from the engien that causes it to die down momentarily. Like it goes PSSTT! then it bogs way down and then revs back up. It idles way to high when it wants to actually idle. I think it may be burning oil? When on the throttle it goes fine without any backfire or strange noise but has no real power. Spark plug is BLACK and dry. Compression is 143. And Other things Im probably forgetting but thats the majority.
Things I've tried:
I started by cleaning the carbs, new spark plug, and just a general tune up and cleaning. Which helped. But it goes downhill fast. Ive got the hole back end plastics taken off now to check the muffler for any type of block and havent found anything. One time I check the airbox, it was full of gas. But it hasnt had that issue since that time. I have tried to turn the air fuel mixture screw and got it to idle at its best point, its hard to get at but its not really running well enough to even tell where its good. Its at its best now though. Ive tried turning the idle screw out for the high idle but the little wire thing the idle screw is on broke off so you have to take the carb out to adjust that now. I set the valve adjustment today as well as a new head gasket to try and stop the oil getting to the cylinder. Didnt notice any difference in how it ran but it might stop buring oil. I know the gas deffinetily comes out the gas line. Even more so when its running. I hooked it up to a funnel and hose to supply it with gas and it doesnt seem to help at all.
Im concerned about one of the hoses on the carb thats gone I think that may be causing a vacuum leak, It goes from the right side of the carb to the fuel on/off/res dial. Not postive what it does but I assume it creats a vacuum to push more gas in which would be maybe why its running so slow?
Usually I can fix this stuff with enough time but I cant figure it out! Any ideas? I can post vids of how it sounds as well as pics if that helps. Im sure I missed something but theres a lot to cover!