Polaris Max speedon 2013 XP seems off.

[mosslager]

Curious if any others have this issue and what the most likely cause is. i suspect slack in the throttle cable but that doesn't account or the reported speed. I recently had a nice long (1.5 mile) straight, smooth, slightly down hill, road to put my foot i to my new XP on. It shot out of the hole way better than my old S modl RZR. At about 65 on the speedo it started to stop accelerating. It then inched past 65-66-67-68 up to 70. I could not break 70 on the speedo.... I then checked my trusty Garmin 60Csx which is very accurate, and it showed a top speed of 64.9 mph. My old RZR-S would register 64 on the gps and speedo. So I have some bugs to work out. What is the likely cause of the speedo being off by 4 mph (stock wheel size), and why am I not hitting 74mph? This is a new RZR, with stock belt with less than 100 miles. At 64.9 would I be generating 4mph of rear wheel spin on hardpack going slightly downhill? I also notice the snappy response of my friends bone stock 2011 XP is much snappier from a dead stop the 2013. It appears that Polaris added a new clutch limiting spacer in 2013 on the micro fiche drawing shown as item 23.... Could this be the cause?


2011 and 2012 version

2013 version with new spacer

 

[Goodtimes]

Interesting on the old spacer trick. I picked mine up 2 weeks after you. I am hitting the rev limiter at 74. I will check with GPS after the rain. And post back.
Are you hitting the rev limiter, I have heard of the slack issue as well

 

[TTSH]

Good possibility with the slack in the throttle cable, check amount of play in the pedal before cable starts moving, see if this helps. On my XP the throttle pedal would move about 1/4 -3/8 in before cable would start to be pulled. As far as MPH I went I am unsure. But good luck!