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Description
Developed for anyone wanting an easier method for tuning fuel injection, the EJK is a customizable solution for whomever wants to take control of their tuning needs. The GEN 3 is a piggy-back EFI controller, does not replace the stock ECU. Monitors the signals to the injectors and makes fuel adjustments based on the mode settings. Push button interface allowing access up to 6 different modes to allow for quick fine tuning by the end user without needing a computer. The GEN 3.5 has the ability to add or pull fuel within each available fueling zone.
The EJK comes programmed and ready to go for stage 1 (after-market pipe and air cleaner) modifications. Forget downloading maps. Forget looking up settings. The EJK installs in mere minutes and you are off to a better, more powerful, smoother ride.
FEATURES
- No computer needed. No dyno required.
- Plug n' play Installation - minutes to Install, base settings are preset.
- Offers full range tunability. Does not interfere with stock ECU operation.
- Simple push button adjustment interface.
- 2-Year warranty - does not void any OEM vehicle warranty.
- Compact size - 2.2" H x 3.4" W x 0.5" D.
Technical Specifications
- MFG. Part Number 8310109
Vehicle Information
Polaris RZR 4 900 Side-by-Side (2014-2018)
The Polaris RZR 4 900, a robust side-by-side vehicle, was produced from 2014 to 2018. It features an 875cc ProStar 900 4-Stroke DOHC Twin Cylinder engine. Initially, the 2014 model offered 88 horsepower. From 2016 onwards, the power output was adjusted to 75 hp, a notable change in engine performance. In 2018, a significant evolution occurred with the model designation shifting to RZR S4 900 EPS. This "S4" version typically indicates a wider stance and enhanced suspension components, such as Fox Podium shocks, providing improved handling and increased off-road capabilities. While trims and color options varied over the years, the core platform remained consistent. FAQ:
Q: How can I ensure parts fit my RZR 4 900?
A: To guarantee compatibility, please use our year and edition selector on this page.
Maintenance
| Component | Interval | Details |
| Initial Break-In Service (Engine Oil & Filter) | 25 h or 1 month | Change engine oil and filter. |
| Initial Break-In Service (Air Filter) | 25 h or 1 month | Inspect and replace as necessary. Check installation and clean ducts. |
| Initial Break-In Service (Cooling System) | 25 h or 1 month | Inspect fluid level and check for leaks. Add coolant if needed. |
| Initial Break-In Service (General Lubrication) | 25 h or 1 month | Lubricate all fittings, pivots, and cables. |
| Engine Oil & Filter | After break-in: 800 km, 50 h or 6 months. Subsequently: 1 600 km, 100 h or 12 months. | |
| Drive Belt | Inspect and adjust: 1 600 km or 12 months. Inspect and replace if frayed/damaged: 800 km, 50 h or 6 months. | |
| Spark Plugs | Inspect: 100 h. Replace: 8 000 km or 500 h. | |
| Air Filter | Pre-ride inspection, replace if dirty. Inspect and replace: 1 600 km or 12 months. | |
| Coolant (Cooling System) | Inspect fluid level/leaks regularly. Inspect strength seasonally and pressure test yearly. Replace: 8 000 km or 500 h. |