Jump to content

  • Do you own an ATV? Join our Forum!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.


2017 Sportsman 570 EPS - Starts irratically

Recommended Posts

 The quad has done this off and on, almost since new, but it's gotten worse this year. Sometimes if I freshly charge the battery, it'll work fine, others times that won't matter. Turning the key to on it sounds like it's connecting as I go to the start position, slightly before the full turn, but it's not like there is just a sweet spot to find, it's totally erratic.

Now the battery is basically dead so I put a new, slightly bigger AGM battery in today to replace the factory one with all of 800 miles on it, but those have lots of plowing hours included. 

I was able to get it started once, but it still went into limp mode after just a few moments of driving it (that's another topic), so I put it back in the garage and started probing around. Now it doesn't even try to turn over.

Is an ignition switch, the $18 shipped aftermarket variety on Amazon worth a shot? Or should I go straight for the starter? The new switch may not come for over a week, so I hate to just put my hopes in that if I'm missing something obvious. Fuses are good, so it's not something super obvious.

Share this post

Link to post
Share on other sites

Does the starter solenoid click? Have you tried jumping the solenoid or starter directly?

Share this post

Link to post
Share on other sites

Yeah, it does click and usually it'll turn over. I ordered a new spark plug, solenoid, and ignition switch last night since the aftermarket parts are cheap and I can have them by the weekend to test. 

I pulled a few things apart last night, including the whole front cover, and plan to undo a bunch of the wiring clean terminals and reassemble when I get the new parts. I'm also planning to run supplemental grounds and postives from the battery to frame like I would do for car stereo installs to help maximize the potential of the electrical system. Electrical seems to be the overall issue whenever I've run into intermittent issues.

Maybe that'll also help some diagcodes that recently popped up as well.

Share this post

Link to post
Share on other sites

Quick update on this in case it helps anyone... After removing the wiring on the terminal block, taking a stainless brush to them, and redoing that setup nice and snug, I was able to get the machine running right away.

However, driving up from the frozen pond with it a bit later, it shut off on me, due to the fact I was driving on the old ignition switch as the new one arrived later yesterday. I was able to wiggle the wires around and get it home, but after putting the new switch in and finding that it was still intermittent, and pull the ignition switch plug apart and removed all of the wire terminals from it. I cleaned the dielectric off those with an air hose, scrubbed them the bit I could, and then carefully bent the inner portion that acts like a spring to maximize the connection as some were a big saggy. Note that I had that apart a few weeks ago as I found one of those wires had broken nearly through due to a bit of oxidation at the terminal (see the pic). I soldered and crimped it back it place and it was holding well. A small screwdriver or a terminal disassembly tool (like I use) made pulling the wires out very simple.

Now it's working beautifully. Strongs stronger than it ever has. I'm 99% sure the worn terminals that I bent back and the broken wire were causing all of my starting issues after all of that.

I'll keep the old ignition switch and starter solenoid I'd bought as backups.


Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Tagged Content

    • By Mark Gibeault
      Does the onboard system provide everything needed to atleast point out any electrical component malfunction and is there ang benefit of using an obdll diagnostic tool with an adapter for this machines diagnostic port?
    • By jwline
      Friday evening went riding, rode for a good hour or so everything was fine. I went to take a short ride to the restroom (less than 100 yds away) and all of the sudden everything flickered and then just died out. Accompanying the problem I noticed the killswitch completely locked up. Once daylight hit took the killswitch apart to find it had shorted out and melted the plastic inside. Has anyone else had anything similar to this and if so what did you do to fix the situation? I have a new killswitch on the way to replace the obvious problem but was wondering could there be a bigger issue at hand. We tested with a voltage meter to make sure everything was still getting power from the battery and as far as we could tell it was.
      Any advice/info would be GREATLY appreciated.
    • By Budman
      After purchasing a lightly used 2018 570SP (300 miles on it) I noticed that the display was flashing on and off. I remember reading awhile back that this was a common problem on the 18 model. I can't remember what the fix is. It also turns over slow even though the battery is charged. Anybody know what the fix is on this issue?
    • By Jeremy Morris
      If you're getting that pesky leaky seal on the pinion of your front differential and the pinion has allot of play, polaris won't sell the bushing needed to repair it properly without having to shell out big bucks for the complete ring and pinion kit. 
      I have a kit with an upgraded bushing, Japanese made bearing and USmade seal
      50 shipped in the US and 55 to Canada

    • By Darcie Foley
      Hello all. New here. I made a boo boo that the dealer wants no part of so I'll just suck it up and pay for the damages I did. Was moving some electrical connections to take from plastics off and thought I had taken the neg cable off the distribution block but I took a positive off. It was kinda dark and I know should have taken the battery cable off first. Dumb mistake on my part. Any how when I took the winch positive off the block the main hot cable came off too and touched the frame around block. I have no power to anything and a chassis relay clicking fast and no power to display or anything else. Any idea what this could be. Charged battery and tried that hoping it was that. But nope. Unfortunately. Thanks in advance people. 
  • Similar Topics

    • By Brennon Heflin
      So I bought a 2000 quad runner 250. I'm having some issues an wondering what it could be I replaced the pet cock valve an the fuel filter an pump inside tank I also put a voltage regulator on it. The problem I'm having is that when u give it half or more throttle it bogs down an loses power what could it be the bike is almost like new an cant figure it out any help would be great
    • By Stephanie Webb
      I have a 2000 500 quadmaster lta an just rebuild the gear box an my high gear is like nuetral will not move but all other gears move nothing looks broke just need some help cant figure out what gear that would be or if it could be the shifter fork 
    • By mike91
      I’m just wondering what year bike i got? it seems the vin has been rubbed off i got it from a auction here in Australia engine starts but seems has a dirty carb wont idle well
      and also has a problem I put it in gear and makes a grinding noise but does not move it the neutral light goes out but then when I change gear it grinds more in the higher gears as well I’m guessing the differential is stuffed so wanting to buy new part for it will start the pull down next week

      this is the first bike I have worked on used to dealing with cars

    • By smitht18
      Looking for the rectifier.  Most bikes have near magneto.  It appears the KQ has it in front.
      Can someone tell me exactly where it is? 
      Bike not charging and magneto checks out ok
    • By Hunter19
      How are you doing guys I just joined I have a 1998 Suzuki King quad I’m having problems with high RPMs the ATV idols perfectly but soon as a throttle up it doesn’t stall but it just bogs down it has no power any suggestions thanks
  • Recently Browsing   0 members

    No registered users viewing this page.

  • Create New...