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  1. CDI vs ECU - what's the difference?

    ATV Repair and Maintenance
    It has recently come to my attention that certain Polaris vehicles with claimed Capacitive Discharge Ignition (CDI) actually has Electronically Controlled Inductive Discharge Ignition (ECM or ECU unit). From Wikipedia: As ignition technology developed, engineers realized that a functional...
  2. 2008 Sportsman 500 HO EFI Weak Spark

    ATV Repair and Maintenance
    Been having some issues with my 2008 Sportsman 500 HO EFI. Back in the fall it kept stalling when coming to a stop. Finally got around to checking it out over the winter and determined that the rectifier was going bad. The voltage output jumped back and forth from battery voltage to 14 volts...
  3. Sportsman 90 CDI problem

    ATV Repair and Maintenance
    I have an 07 Sportman 90 that has run perfectly since the day I bought it new. The kids grew up and I sold it, to my nephew. I rolled it out of the truck, started it, and his boy rode it off. After about 100' it had problems. It idles fine, but any throttle just bogs it down and it chugs...
  4. 2005 Phoenix - tips for determining cause of blown CDI?

    ATV Repair and Maintenance
    Hi, my son has an '05 Phoenix (200), we had a problem mid summer with backfiring and idle issues which disappeared when we turned the headlight on. Assumed there was therefore an issue with the voltage regular. Replaced the regulator and it ran great (without the headlight on ;) ) for about a...
  5. 2000 Trail Boss 325 wont start

    ATV Repair and Maintenance
    Hello all, I have a 2000 trail boss i rode for a year. it ran very rich (plug black and exhaust smelled of gasoline) once it got warmed up the engine would bogue down or hesitate after 1/2 throttle. It would shut it down on its own eventually and was unable to restart it again. i would wait a...
  6. 2002 Polaris Magnum 325 4x4

    ATV General Discussion
    Hey guys, hope everyone is doing great and enjoying their rides! If anyone needs a CDI BOX for a 2002 Polaris Magnum 325 or Trail Boss, I have an extra. Thanks!
  7. CDI or starter

    ATV Repair and Maintenance
    I have a 2007 outlaw 525 irs It's sat a little while then I could get it to start with starting fluid, so I re jetted it with the jd jetting kit and cleaned the carb completely. Now I know it's getting fuel and turnes over, but now it's not getting spark, at all. Very annoying other posts I see...
  8. CDI/ Coil issue 04 sportsman 6x6

    ATV Repair and Maintenance
    Hi, new member here, could really use some help. No spark or intermittent spark. The white/blue wire from the CID box to the coil is grounded. The brown wire of course is ground but the white/ blue wire should have voltage when cranking correct? With this wire showing to be grounded, do you...
  9. R.P.M. Reading Incorrect after coil replacement

    ATV Repair and Maintenance
    My 06 Sportsman 450 wasn't charging anymore so I replaced the bad stator and crankshaft position/pickup sensor and now I'm recieving the charge but my RPM's are incorrect.. Not even relative to actual engine speed I can a steady high idle and watch RPM go past 4000 at which point engine begins...
  10. 03 Trail Boss

    Polaris Trail Boss
    Hey guys, I'm new to the site. But I'm needing help with finding a CDI Box for my bike. When I picked up this bike I didn't realize how expensive a new cdi would be (around 200 new). I haven't had any luck finding any used ones, so I'm hoping some of you can give me an idea where i can get a...
  11. 2001 Scrambler 400 4x4 No spark unless black cdi wire unhooked

    ATV Repair and Maintenance
    Ok so I have spent the last couple days tearing this thing apart testing wires without a service manual (not for lack of looking) figuring out what wires run to where and what they do. I have found that when I unhook the wires that run from the key and kill switch to the black wire that runs to...
  12. Polaris Hawkeye CDI Problems

    ATV Repair and Maintenance
    hi everyone, I have a Polaris Hawkeye of 2006 After doing some research I found that all the Hawkeye Quads built from 2006 till 2011 have the same engine an carburetor. Only there are three different CDI boxes (ignition). 2006- Nr. 3089862 2007 and 2009 Nr.3089238 2008 – 2010 and 2011 Nr...
  13. Still No Spark, CDI??

    Polaris Sportsman
    Ok folks I have a 2003 Sportsman 500 HO with no spark at the plug. I have repaced the ignition coil and the stator (Ricky Stator was fast by the way), the only thing I know left to replace is the CDI Box. Does anyone have any suggestions as to where I can get one without having to spend mega $$...
  14. 2007 sportsman 90 studders past idle

    ATV Repair and Maintenance
    This bike has been sitting up for years. as far as I can tell it's a 2007 sportsman 90 4 stroke I went through the fuel system including the carb. cranks fine, rough idle but I can't tune it due to that fact that it won't power up past an idle. It acts like the rev limiter is out of whack...
  15. 03 Sportsman 700 Twin won't start

    ATV Repair and Maintenance
    Recentley replaced the rectifier and was running great. Went to go on a ride and as I accelerated the machine lost power and died. Put new plugs in (gapped right) and checked for spark. All good. Checked fuel filter (good). Pulled the main fuel line off and cranked to see if fuel pumped...
  16. Cdi help

    ATV Repair and Maintenance
    I have an 03 predator and I cant find the cdi, if anyone could help it would be greatly appreciated.:kabong:
  17. Looking for a replacement CDI...

    Polaris Sportsman
    I have an '03 600 Twin. It died just after hunting season started. I have managed to find the service manual and have followed the instructions to troubleshoot a no spark problem. I am in spec for everything I can test except the CDI. I cannot find one for less the a couple of hundred bucks...
  18. 1994 400l fail

    ATV Repair and Maintenance
    whell over the period of the last 9 months my father and i have re built my atv. being that it is so old the gears in the gear box finaly showed it. the busted and tor apart. we first took out the gear box and took that apart and replaced all faulty gears. now the gear box is back in comission...