battery shows 12.5 and it is putting 14.5 back at idle,has a new regulator stator checks out fine also the speedo needle jumps up and down

 

Sounds like you've eliminated everything except the speedo. Not one of these members reported back to what they found out that really could help,but all shared the same thing,rpm drop then rpms raised. Would be nice if you had a buddy that had one so you could swap to see if the problem is speedo related,not a wiring or connector problem. Hard to justify a high $ speedo change on a guess.Or even a rebuild as a few have done. http://forums.atvconnection.com/pola...ml#post3232409
http://ka7oei.blogspot.com/2013/10/r...n-polaris.html

 

Ya I know.May just ride it like it is.Thanks for your input

 

IF you find a solution to this or if it's just a quirky deal that fixes itself,post back to help others. Three or four people having the same problem doesn't sound coincidental.

 

Will do

 

I know this is old but I started having this exact problem on an 08 RZR 800. Was there ever a resolution?

 

Did you ever find the problem? My 08 RZR 800 has same issue

 

For anyone looking for an answer to this. I had the same issue. Turns out that it is the voltage rectifier/regulator. Had the classic over charging issue. Replaced the original VRR that solved my charging issue, but gave the tach issue. Turns out that the "new" VVR was leaking AC to ground (2v). Enough to cause the Tach to loose sine wave frequency. How am I sure about this? Well I replaced the stator with no effect. I finally gave up on the aftermarket direct replacements (2x) and bought a quality MOSFET regulator. Problem solved, probably forever.

I struggled finding a way to test the VRR. Doing the Diode test is not enough. Best method I found is to test the stator. Measure ohms across the phases (yellow wires), Spec on mine was 0.3ohm. If that's good run with VRR disconnected and measure AC across the phases (yellow wires) Should see some 50vac. Then check yellows to ground.They should be 0. If the stator checks out it's the VRR even if you just put it in.

 

Hello adrexco! After more than seven years of apparently using the wrong search terms (on a different forum), I finally found this string with your solution. Before I drop $134 for a Mosfet VRR for my 2012 Sportsman 500 HO, I seek your advice. Prior to replacing the VRR, I had the exact same tach issue, PLUS a flashing battery light at idle anytime the headlights were on. The new aftermarket VRR fixed the charging issue, but the tach issue remains unchanged. In your opinion, is it reasonable to assume the brand new aftermarket VRR could be still be causing the RPM issue?