Installing a new Thermal Sensor

Just had a quick question. I assume i have to empty the coolant but then, when installing the new thermal sensor, do I just remove the old and screw the new one in or, do I use something on the threads of the sensor?

96 sportsman 500

Hey folks, new guy here. Here we go , I got a 96 Polaris 500 sportsman been a project for a while now, so far new cam (H.O.) & rockers, timing chain, coil, plug wire, fuel pump, piston &rings, primary clutch, belt . Timing is dead nuts, gaps are right .006 . Cleaned and rebuilt carb. Air fuel mixture screw, 2 turns out ,1 1/2 turns out all the same, quad still has no power... Can I go to a 40mm carb, and if I do, do I need to change exhaust? Also going to change secondary clutch seams to be making noise , gone this far why not. Am I chasing a unicorn here , will this ever have any real power? If so , how do I achieve it? :thinking: Also new air box and lid ,

2018 ACE 570 Lower door kit

Has anyone installed the lower door kits themselves on an ACE that came with the 1/4 doors from the factory?

I ordered my kit after having the ACE for a couple weeks. I went to install it this past weekend and was very confused and a little disappointed. I did the work over at my neighbors garage because it's heated and also because he is an excellent mechanic as well as having been an Auto Body technician for going on 30 years.

First off, the directions from Polaris are terrible.

Once I got the upper door skin off and the frame of the lower door attached to the upper door frame, I mounted the lower door skin with the 3 screws. It was immediately apparent that the upper door had to be adjusted for the lower door skin to fit into the "opening". We adjusted both the hinges of the upper door and the strike mounting block that is attached to the front roll bar. Once we got a somewhat OK fit for the lower door skin and tightened the hinges and strike we went to check opening and closing. To our surprise, the door would not open because of the plastic at the upper rear part of the lower skin was interfering with the frame that holds the upper door. We tried adjusting the door as much as we could until all those crummy torx screws were almost stripped. Finally we came to the conclusion the only way to get the door to open all the way was to cut the corner out of the lower door skin. Here is pictures of what I'm talking about:

Left door:


Right door:


One final thing is that most of the lower door seals up OK to the body, but the back portion still has big gaps.

Right door:


Left door:


I am just wondering if at some point they changed the bodywork and or mounts but never got around to changing the lower door skins? I'd be interested to know if the older ACE's have lower doors that fit properly.

Thanks for taking the time to read all this.

2006 sportsman 500 efi awd stuck on in fwd but doesn’t work in reverse

Hey guys
I know there is alot on this topic but not exactly what I'm dealing with. My awd is stuck on in high and low weather it's switch from 2x4 or 4x4. When I put it in reverse and push the override button the indicator lights up and says slow but only the back wheels turn. I just picked up the quad and havn't looked into it much yet just wondering if anyone had 's similar problem thanks.