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I brought home a quad that doesnt like having gas...


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Hello all wise and knowledgable group of 4-stroke geniuses, I bought a 98 Warrior a few days ago and when I showed up the dude already had it running for me (shady) and it was idling real high like it had a vacuum leak, but it revved up ok so I took it for a spin to make sure the tranny was ok, which it was. I then shut it off and went to the auto shop next door to borrow a can of carb clean to hunt for the vacuum leak. I start it back up and its idling fine...perfect even, but when you hit the throttle it falls on its face. If you hold it open it dies. So I buy it for a few bills less than the asking price figuring its a carb issue. I get it home, pull the carb, go through it and the only problem I find is the choke is really dirty. A bunch of dirt in behind the plunger. Thats it though. All the circuits are clean. The clip on the needle is in the middle, it has a 145 main jet when stock is 125, the pilot jet is stock, it has a big gun exhaust and a pro designs filter kit on it. I know its running rich, and it has fouled the plug once so far. I would like to put the stock main back in it and see what happens, but I dont really think its gonna change much. The mix screw is out 1 turn right now, but I have had it from 3/4-1 1/2 and it makes no difference. I am at the end of my common sense rope, and I think I may be thinking to hard about the solution to this, as it seems that an easy fix is just out of my reach. I dont wanna start changing part after part, so please help meee!!! The vent hoses are clean and open also.

Edited by 97zjguy
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Check the ground on the reverse lever switch, sometimes these get rusty and makes the quad run like its on the rev limiter all the time. Even if this isn't your problem now it might help you in the future

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check the needle valve and also check the crankcase oil level (float bowl was overflowing and running into the cylinder), mine was doing something similar after replacing the stator assembly, this was on my 94 Warrior, and also just happened with my 06 Z400, i suspect the fuel with ethanol in it is partly to blame.

hth

Rick, Ore

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Before you change or do anything else, make darn sure the parking brake switch is fully DISENGAGED. It will cause it to sound like a rev limiter and not rev up at all, and if you hold it open it will die. Disconnect the brake switch if nothing else and try it. Just disconnect it and plug the two wires together.

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Will it cause a loss of spark during cranking? There are two, two-wire plunger type switches that plug into the parking brake. ? I dont have a manual, but wouldnt you have to possibly open or close those two circuits, depending on which way the switch operates?

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