STX-15F Endurance Kits
Kit Performance Data
Stock 61 MPH @ 7,600RPM
Endurance Kit

70+ MPH @ 8,100RPM
NOTE: All testing was performed with 1/3 tank of fuel and trim in neutral position.
PARTS LISTING
DESCRIPTION
QTY
 PART #
PRICE
INFO
RIVA STX-15F Endurance Engine Kit
`07~08 Models use RK1000-15F
`04~06 Models use RK1000-15F-07
1
 RK1000-15F
$ 1,650.00
RK1000-15F-07
RIVA STX-F Performance Power Filter Kit
1
 RK13085
$ 129.95
RIVA STX-F Free Flow Exhaust Kit
1
 RK16085
$ 199.95
R&D STX Aquavein
1
 111-15001
$ 129.73
RIVA Modified OEM Intake Shoe (155mm)
1
 RK23085-155
$ 506.51
Skat-Trak Magnum Pump w/Swirl Impeller (155mm)
1
 PSK150NEWE558
$ 1,000.95
Skat-Trak Reduction/Steering Nozzle Assembly
1
 PRNKAW551
$ 742.95
R&D STX Ride Plate
1
 121-12000
$ 270.32
RIVA STX-F Pro-Series Sponson Kit
1
 RK26085
$ 299.95
Skat-Trak Heavy-duty Steering Cable
1
 PRSTKAWSTXR
$ 195.00
PARTS PRICE TOTAL
$ 5,175.31
Price if Purchased as a Kit (`07~08 Models)
$ 4,836.00
Price if Purchased as a Kit (`04~06 Models)
$ 4,836.00
Endurance Kit Standard Equipment
Endurance Engine Kit
Performance Power Filter
Pro-Series
Sponson Kit
Billet Exhaust Tip
Pro Spec
Complete Craft
Click on images to view
Kit Overview:

Our Endurance Racing Kit for the Kawasaki STX-15F contains the same components and specifications that Team Kawasaki developed to dominate the international racing circuit. This modification produces excellent acceleration and a top speed of over 70mph using VP MS109 race fuel (Jet X).

High compression racing pistons are installed along with performance intake & exhaust camshafts. Fuel delivery, engine timing and rev limit are optimized to match the increased demands of the modified engine via a race programmed Mitsubishi ECU that plugs directly into factory wiring harness. Kit includes all necessary gaskets and detailed installation instructions. We highly recommend use of our Performance Power Filter (part# RK13085) with this package.

RIVA Free Flow Exhaust Kit is installed to replace the restrictive sound suppression system located between waterbox and hull exit reducing backpressure and engine operating temperatures. Utilizes stock exhaust outlet and includes RIVA Billet Exhaust Tip.

R&D Aquavein Intake Grate and Ride Plate are installed. Top loader intake grate improves hook-up while reducing cavitation. Ride Plate design allows craft to plane faster increasing acceleration & top-speed as well as improving handling.

Skat-Trak Magnum Pump with Swirl Impeller is installed. Superior materials and design maximize increased power. Swirl Impeller reduces cavitation while producing improved acceleration and top-end speed. OE pump inlet shoe is modified to accept oversized pump.

Skat-Trak reduction and steering nozzle kit is utilized. Interchangeable venturi rings allow fine-tuning to match modified engine and aftermarket pump. Trim of steering nozzle is fixed, but can be adjusted via a turnbuckle system on pump assembly.

RIVA STX-F Pro-Series Adjustable Sponsons are installed. Sponsons dramatically improve handling with a superior blade design and mounting angle. Sponson depth is adjustable to accommodate any riding style.

Endurance Racing Kit includes all necessary hardware and detailed installation instructions.

FOR COMPETITION USE ONLY.
ADDITIONAL PERFORMANCE UPGRADES
DESCRIPTION
QTY
 PART #
PRICE
INFO
UMI STX Steering System
1
 KA-04605-STXR
$ 520.50
Blowsion Throttle Trigger (Clear / Straight Pull)
1
 03-05-208
$ 68.50
UMI Throttle Trigger Adapter
1
 KA-01550
$ 11.95
RIVA Aluminum Handlebars (Black)
1
 RY204B
$ 64.95
RIVA Racing Grips (Black)
1
 RY206B
$ 9.95
RIVA / Jettrim STX Custom Seat Cover
1
 RK5-STX-COLOR
$ 239.95
RIVA STX Rail Molding Kit
1
 RK5-RMK-085
$ 194.95
RECOMMENDED SPARE PARTS
DESCRIPTION
QTY
 PART #
15F Cylinder Head Gasket
1
 11004-3721
15F Cylinder Base Gasket
1
 RK1785-G-40
15F Intake Manifold Gasket
1
 11061-3716
15F Exhaust Manifold Gasket
1
 11061-3713
Endurance Piston Kit (sold individually)
1
 RK1000-15F-EPK
Kawasaki STX-15F Service Manual
1
 99924-1325-03
Kawasaki STX-15F Diagnostic Kit   
1
 B5700-11505 (software version 2.3.2)
1
 57001-1504 (signal converter)
1
 57001-1470 (comm. cable and adapter)
1
 57001-1535 (relay cable)
NGK Spark Plugs (sold individually)
4
 CR9EK
 
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