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Summary: Maintain the Polaris ATV thumb throttle and four-wheel drive switch; learn how with tips from our expert ATV mechanic in this free ATV Maintenance and repair video.
Views: 2,612 | Tags: maintenance, offroad, all-terrain-vehicle, four-wheeler, three-wheeler, Polaris, all terrain vehicles
About the Expert
Tom Roland Tom Roland is a BMW, Ducati, and Polaris certified mechanic and the head mechanic at cottonwood motor sports in Cottonwood, Arizona. He currently works on ATV... read more
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Questions & AnswersOn behalf of Expert Village, my name is Tom Roland and we are Cottonwood Motor Sports and I am here to tell you about doing service on a Polaris Quad and this is fairly representative of macho, many of them. On most Polaris's, the 4-wheel drive switch is built into this handle bar switch up here. Also built into the handle bar switch is a switch called an EPC switch and what it is for is if the throttle would stick wide open and you let off of this, the switch in here is made such a way that it will close two contacts and it will kill the motor so that the thing won't take off and runaway with you. On the flip side of that is if the preplay on this handle here for the throttle cable is too excessive, sometimes those contacts inside will slowly close together and the motor will die in an idle. And the most common cause for that is if it dies in idle as this cable breaks in, then the clearance on the cable gets excessive and that allows the points to come together and that will make the motor die. Inside this lever here, there are two threaded portions of the cable and if you thread them farther away, that takes up the play in here and the play will keep the contacts open and that is all it takes. People commonly come in and go my unit dies in an idle. We go up here and we turn it about three turns, we see what the preplay is and that commonly takes care of it all the time. The other thing to check is, this one here has a turf mode which allows it to be the differential and the final drive in the back, it allows it to be a full differential. When it's a 2 x 4 it's a locked rear end which mean both wheels turn the same all the time and when it is an all wheel drive which means all four wheels drive all the time. When we do a service, that is also something that we have to do is to take these vehicles on a hill and we confirm that all these things are working the way they are supposed to because just driving them around in a lot won't tell you that. You have to be able to put it somewhere you can check it to make sure that it works.
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