Description
ULTRA 250X STAGE 1 KIT – 07
This modification delivers the maximum level of performance (+ 5mph) through easily installed air intake, exhaust, and pump enhancements. No internal engine modifications are required.
RIVA Performance Power Filter is installed providing greatly improved performance by replacing restrictive stock intake system. Delivers an increased volume of air via a large 4″ diameter intake duct and oversized K&N filter element. Includes water repellant pre-filter cover for primary filter.
Valve Cover Block-off Kit is installed. Kit is designed to seal-off the ports on the valve cover when removing the emission control system for racing applications.
Top-Loader Intake Grate is installed. Eliminates prop spin and cavitation while delivering improved handling and acceleration with no loss in top speed.
RIVA Performance Ride Plate is installed. Ride plate provides quicker planing and increased top speed by trimming nose up for reduced drag. Also improves handling and reduces porposing with superior design.
RIVA Pro-Series Sponsons are installed. Our sponsons dramatically improve the handling through their superior blade & backing plate design. Sponson depth and forward/aft position is adjustable to accommodate riding style.
RIVA Free Flow kit Enables you to bypass or remove secondary muffler (weight savings of +10lbs) improving engine performance by reducing back pressure and harmful detonation. Mandrel bent aluminum exhaust tube is lightweight and powder coated to resist corrosion. Included billet exhaust outlet cover (also sold separately) with laser etched graphics is anodized to prevent corrosion. High temperature silicone couplers included with detailed installation instructions.”
After extensive testing of aftermarket impellers we have determined that the stock impeller provides the maximum performance for both stock & Stage I applications. We will report updates to our impeller recommendation at such time as we find an aftermarket advantage to the stock impeller.
NOTE: RIVA Performance Kits intended for competition use only.
