Category Archives: RZR XP 900

RZR XP 900

Shocks

I do all trail riding not much of a shock expert, with the stock fox shocks what are the best settings for fairly fast trail riding and climbing hills?
Thanks
Wayne

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RZR XP 900

Shocks

I do all trail riding not much of a shock expert, with the stock fox shocks what are the best settings for fairly fast trail riding and climbing hills?
Thanks
Wayne

Sent from my iPhone using Tapatalk

RZR XP 900

900 xp front end clunk

new member can’t figure out what to do. have some mechanical skills so some help will help me figure it out. front drivers side has a bad clunk (getting worse) every time i hit a bump… or now every time i run over a golf ball size rock it makes a loud clunk. changed the wheel bearings and the cvs ( cvs for a different reason ) but not sure if its rod end joints or a arm bushings can’t check at the moment cause its raining and i have a small shed not a garage. any help would be much appreciated
RZR XP 900

Dead cylinder nightmare

Hi guys,
New to the forum and need some direction from the masters. I will tell the story and maybe someone can verify what I’m missing:

BACK STORY:

Bought a used 2013 RZR 900 that was smoking and had a cold start issue about a year ago. 2 months ago I got around to ordering new cylinder, piston and rings, gaskets and timing tensioner.

Tore motor down and rebuilt top end. (Rushing to make a big ride as always). All together I still had the hard start issue but the smoke was gone. Pressed for time I narrowed the hard start to the intake valves being too tight. I didn’t have time to order new shims so I took it the way it was. I knew I would have issues but they weren’t tight enough to touch the piston. Through the weekend the start got worse and I was smoking a little which I expected from the compensation of fuel for the lack of vacuum. When I got home from the 3 day trip I tore it down to inspect the pistons, valves. Everything was okay so I reassembled and shimmed the valves.

New Problem:

I fired the RZR up and it was amazing! First time it has cranked without throttle since I’ve owned it! Then I gave it a little gas and it sounded like death. Popping in exhaust. After troubleshooting I found that the mag side is DEAD. Unplug injector with no change. Well, a little change. A few pops in the exhaust on unplug and replug. I have done everything that makes sense to a novise troubleshooter and need some advise from the RZR experts. I will list the steps I have taken to identify the problem.
-I have rechecked timing MULTIPLE TIMES (even had others verify what I already knew)
-I swapped the plugs, problem stayed on Mag side
-I swapped the plug wires, problem stayed on mag side
-I swapped the coil with a known working coil, problem stayed on mag side
-I swapped the injectors, problem stayed on mag side
-checked spark the old school way, out of cylinder touching metal and had spark
-Spun motor slowly while looking at reluctor looking for missing teeth, no luck
-Cleaned CPS and reinstalled multiple times.
-compression tested both cylinders 200 mag side 190 clutch side
-Spun motor to open exhaust port on mag side, hooked up compression hose and attached compressor hose to verify no exhaust restrictions.
-Removed air box and watched inside throttle body during quick snap accelerations to see injector pulses. look good to the naked eye. pulsing similar on each side with no "dump".
I have Air/fuel/spark/combustion with no run (what they taught us in school was a LIE!! lol)

My best friend is bringing his oscilloscope over this weekend so that we can "see inside the cylinder" but I wanted to see if anyone had any suggestions. I will post results when we find it so no one ever has to go through this again. I am beyond angry. I have eliminated/verified every part of combustion but still don’t have combustion.

RZR XP 900

2014 RZR 900 XP Dual Filter Upgrade Questions!!!

Hello Everyone
I know this discussion has been going on since the XP was released but I am looking for something that I have been unsuccessful for locating. The one think I am always stressed about is the air filter because I know they are known to fail so I continue to take extra steps to make sure it is clean.

I have a 2014 RZR 900 XP

I currently have Air Raid Outerwears prefilters
Airaid 799-352 Pre-Filter Air Filter Wraps for Polaris Ranger RZR XP 800cc 900cc

I also oil the factory External filter and I also grease all the edges of the air box.

I still run the factory paper filter (Polaris brand only)

I also purchased the Desertcraft Super Seal Gasket.
Desertcraft Polaris RZR XP 900 Super Seal Gasket :: Side By Side and UTV Parts Warehouse – SXSPerformance.com

I know at this point I am prob over doing it with the air filter situation but honestly I think it works pretty well being my factory air filter says really clean and I also never have dirt in my air box!

I ride in Extremely dusty areas !!!

Here is what I am looking for
I want another Air filter to go inside the Air box over the intake tubes that still fit with the factory Paper filter. Most filters I have found that go over the intake tubes inside the air box require you to remove the factory paper filter. So overall these filters will be very small but ones extra filter would make me feel a little more secure. I’m sure there is a filter out there that will fit, I have just been unsuccessful in locating one.

Has anyone done something like that ???

Does anybody have a better idea ??

I know there are other kits out there to completely change the air box set up but I just cant justify spending another 300+ changing the stock location because the factory setup isn’t effective enough

Hope someone has a better idea