Having a low engine RPM/power issue with your 2014-2023 XP 1000, RZR S 1000, or General? See our quick checklist below on what goes wrong most commonly. While the list is more specific for the 1000 motor, the same things would apply to the RZR 900 models and various others.
1. Easy stuff first: Spark plugs & air filter: Make sure these items are clean and in good operating condition first.
2. Primary clutch rollers/weight pins: If the primary rollers are dragging on the weights or the weights are sticking on the pins, this will lower RPM. Remove your clutch cover, remove the belt, then remove the 6 bolts holding the primary spring cover in place. Collapse the clutch and inspect the top of the weights for excessive wear. The top of the clutch weights ride on the rollers. Apply force to the rollers while you try to roll them. If they rotate with difficulty or not at all, they should be replaced (or replace the clutch if excessive wear is found elsewhere as well). Next, ensure that the clutch weights swing freely on the pins. If the weights do not swing freely, remove the weights and pins. Clean the pins of any rust with emery cloth or a Scotch-Brite pad. Wipe clean and apply a SMALL amount of anti-seize or grease with a q-tip. Re-install the clutch weights and ensure proper operation.
3. Fuel pump: If the fuel pump is weak and/or the fuel filter is dirty, this can cause low RPM/power issues as the vehicle will run lean. It may run fine at idle to cruise, but cannot keep up with wide open throttle fuel demands. Test equipment can be expensive, so we suggest just replacing the fuel pump. See our AA fuel pump for RZR XP1000 HERE
3.5. Fuel Pressure Regulator: this is on the fuel pump body and not easily replaced. If the fuel pressure is low, this can also cause a lean condition. We suggest replacing the fuel pump assembly with the one that we sell as it includes the new regulator, better pump, and new filter.
4. Fuel injectors: Injector issues often cause idle issues and all around running issues when clogged. You can try to clean as a temporary fix, but we highly suggest replacing them as they are somewhat low cost. Cleaned injectors seem to have issues again shortly down the road as the injector inlet filters are hard to clean properly. We highly suggest replacing the pump and injectors at the same time as a bad pump can send debris into the injector inlet filters clogging them. Be sure to properly clean the bottom of the tank and flush the fuel lines before installing new injectors/pump. See our fuel injectors HERE
5. Intake Boots: Cracked intake boots at the head can cause a lean condition. These can be visually inspected or spray WD-40 (or something similar) at the intake manifolds when idling to see if RPM drops.
6. Tight valves: Valves wear and clearance tightens up over time. This can cause hard starting and running issues most noticeable at idle, but can also impact peak power/RPM. Checking valve clearance is easy but adjusting them is a different story. Refer to your service manual for this process.
7. TMAP sensor: The sensor near your throttle body or intake plenum (varies based on model) can have wiring issues going to it. This was most common on early model XP 1000’s. The wire would have a small break in it and cause intermittent running issues. A bad sensor can cause issues on any year/model but is not common.
8. Worn out clutches: The sheaves should have a straight angle cut on them where the belt rides. As miles increase, the sheaves will dish in the center. This may not be noticed from the naked eye, but a straight edge would tell you. This lowers RPM and will have you chasing your tail. We also suggest checking secondary rollers and the other things found in this COMMON CLUTCH ISSUES ARTICLE