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400 artic cat
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Posted by: 86250rbanshee

We have a 400 artic cat in the shop it will surge off and on whie under throttle. You ride it around and it spits and sputters, Valve clearance is fine, spark plug seems good, carb has been taken completely apart and cleaned. It almost acts like its a speed limiter, but I guess I'm told here isn't one on it.

Anyone got any ideas?

Posted by: ilpadrino113

it could be running too rich, i'd lean it out a bit and see if it helps

Posted by: firefighterjosh

Take a look at the clutch side lever. Most quads have to be started with the clutch pulled in. That sensor could have failed. Also if the ebrake was taken off can cause a sensor to go crazy

Posted by: 86250rbanshee

Dad talked to a Artic Cat dealer, and they said there is no sensor off e-brake or speed control or anything. There is a electric line off of brake but its just for brake light.

Posted by: firefighterjosh

about half way down it talk about the clutch postition sensor. Tell you how to bypass it too

http://bareperformance.com/news/?page_id=62

Posted by: TTZ450

Take off the seat open the fuse box and look at the diode it looks like a fuse but its black with a white arrow on it.... turn it around so that thew arrow points in thew opposite direction it is now...

Posted by: atvknife

The problem is a sensor that is causing the problem have it inspected (max20)

Posted by: quad97

sport or ute? try draining the carb and catching what comes out, sound like water in the fuel. I am not aware of a clutch sensor on either one of those and I have a lot of experience as an arctic cat mechanic in a dealership. If the 400 ute is making noise in the top end then it will probobly need a new cam chain.

Posted by: woodsracer144

i dont know much about the artic cats wireing but i know polaris if all essed up... is there any light out... oil temp, n, p, r, my buddy worked ona old polaris 3 wheeler and it had a burnt out lite and i spent over 500 on the top end and it was the ligt the whole time... it could be something really simple....