Author: Forum News

I had a bad fuel pump which was replaced by a local dealer here in the Twin Cities.
The ATV has been running well. The problem has been the Quest is getting terrible gas mileage. I rode about 35-40 miles in 40 degree weather averaging about 20-25 MPH and I used 8-9 gallons of gas.

This seems really poor.

I noticed after one of these rides that I was dripping out of the bottom of the engine. I thought it might be water left over from cleaning. It was gas. So I spent some time looking at this... The carburetor is new. Supposedly it was adjusted when the fuel pump was installed, right? NOPE. The dealer didn't do anything here.

I took the carb off, and measured the floats. They are about 3 MMs+ higher than spec. This matched what I saw when I measured the original carb as well. It should be about 1 CM. I am not sure why the dealer didn't notice this? It seems pretty bad.

I carefully adjusted the float tab and measured the height on both sides. It is within spec. I put everything back together and I got: The same or more gas coming out of the overflow! DAMN.

How is this even possible?

NEW fuel pump, NEW carb and NEW fuel filter and the floats are in spec and they are leaking more. This doesn't seem possible. It does seem like even more gas is leaking than before. It has to be the floats. The carb is new and everything is clean. The pin is seated and not sticking. The diaphram looks fine as well.

Now I am tempted to put the original carb back in place. I have cleaned it at this point and it's ready to go.

Carburetor experts please chime in with your thoughts. Thanks.

Maintained a Trailblazer 250 for my son and wife for years and wanted more power for them so I found a 98 Sport 400. Same bike, only different? The Sport was built for Dunes and some things not right so I came here to learn more about Mods and dialing things in. There are model specific forums here, but none for the Sport. Do I post under Trailblazer?
:newbie:

Does anybody know how much fuel you have left in your tank when the fuel gauge starts to flash? I’m specifically referring to a 2015 sportsman 570. On a recent ride I got about 20 miles after it started to flash I never ran out of fuel.

My atv will crank up and idle like normal (1180-2000 rpm) then all of a sudden I will cutoff. So when I cleaned it i accidentally left my radio on overnight so the battery died. It backfired when I tried to pull it off. So I charged it thinking that would fix my problem but no. It almost seems like it's not getting enough fuel because if I hit the gas it'll cut right off. I tried to take the top off of the air box but when I do that it won't idle near as long as it would with it on. Any ideas? Thanks

Just bought mityvac mv4510 coolant pressure test kit for mororcycles but the cap test and rad plug test adapter are too small for my 570 efi bottle neck and cap. Does anyone know what the correct adapters are for the mityvac kit?

To Forum,
Please help!!! my 2017 outlander 570 XT radiator fan cooling motor crapped out, looking at the online parts people RM ATV, AMAZOM, EBAY and can't find the replacement motor. All I see is motor and fan blade together for a replacement and don't list my year or correct size. Thanks

To Forum,
Please help!!! my 2017 outlander 570 XT radiator fan cooling motor crapped out, looking at the online parts people RM ATV, AMAZOM, EBAY and can't find the replacement motor. All I see is motor and fan blade together for a replacement and don't list my year or correct size. Thanks

Hello. I am trying to help out a friend with his Sportsman. I'm not with the machine and when I get up there, Internet will be spotty at best, so I'm trying to gather as much info as possible beforehand.

What I know is that the engine would idle fine, but it got progressively bad where when rolling in, it would bog down. Eventually, you couldn't drive it all. He took it into the dealer and they rebuilt the carb and it was quite a bit better, but not 100%. He drove it awhile and it started getting worse and worse and now it's back in an undrivable state.

He cleaned out the tank and line and (I think) installed a new filter. He also replaced a fuel line to the pump due to a leak.

Is there a way to check fuel pressure? From his description and his feeling is that it's a fuel problem, but what if it isn't? Could it be something else like timing? (I'm not familiar with these things, so bear with me and any irrelevant questions.) Are there parts in the carb that typically fail/wear out?

Lastly, what is a reliable and quality source for parts outside of the dealer since he needs new rear pads and rotor and both rear CV axles.

Thank you for your time here.

I have a 2007 Polaris sportsman 800 that just seems to be getting choked like it’s really not letting all it’s power go and it won’t idle it cranks up and drives ok; fast but not crazy fast if kinda lunges and seems to bog out and it will idle for a minute when you stop but then shuts off and my speedo is broke so I can’t see rpms or even run to see codes I need help!

I have a 2003 sportsman 700. I took a ride today and was working great. then after I stopped for a while, the left cylinder didn't fire when I started it up again and now it just doesn't run great. it idles fine but hardly any power when you give it gas. Any ideas whats wrong with it?? I used a spark tester to determine the left cylinder isn't firing. the boot had some tape around it so being curious I took the tape off to see what was wrong and it was a little crack in the boot. shouldn't affect it I don't think but just giving the info in case its a problem. Any help would be greatly appreciated!!