RACE TECH HI-PERFORMANCE RACE SERIES REAR SPRING KIT
INCLUDES: NPL Collar, NPL Spring, Go-Between, Lower Spring Retainer and Sizing Collar (selected models).
TOOLS REQUIRED: Service Manual, Shock Spring Compressor- Screw Type TSSC 02, Vise with Soft Jaws TMVJ 065 or equivalent, TSPA 01 Preload Adjusting Tool or Spanner Wrench, ¼” Flat Blade Screwdriver, TSSM 01 Sag Master or Calipers.
DIGITAL VALVING SEARCH (DVS) printout: See DVS for your custom spring setup.
Support the rear of the ATV securely. Remove rear shock per the procedure in your service manual. Your model may look different.
Click to enlarge.
Stock Spring Disassembly
D1 Clamp Shock in a Vise with Soft Jaws.
D2 Loosen the Preload Collar Lock Ring using a TSPA 01 Preload Adjusting Tool or Spanner Wrench.
D3 Remove all spring preload by unscrewing the Collars. Use a Spanner Tool if necessary.
D4 Use a small screwdriver to gently pry the Bottom Out Bumper away from the end of the Shaft.
D5 Remove the C-Clip Spring Retainer by pulling the Spring down and sliding the Clip out from under the Bumper Cup.
D6 Remove the stock Spring.
The stock Preload Collar and Lock Ring will be used with the Race Tech Spring Kit. It is a good idea to clean and grease the threads on both the Preload Collar and Lock Ring before installation of the Spring Kit.
Base Kit and Main Spring Assembly
A1 Install the NPL Collar (single flange) with the long end of the Flange facing the bottom of the shock (upward in the picture).
A2 Install the NPL Spring over the NPL Collar.
A3 Install the Go-Between Collar. The step on the inside diameter of the Go-Between goes toward the threaded portion of the shock body; this provides proper clearance for the Collar to pass over the Threads during operation. If this step does not go towards the threads the Collar could get stuck causing damage.
A4 Install the Main Spring (sold separately). Refer to Race Tech’s Spring Search at www.racetech.com for the proper spring series and rate selection.
A5 Install the Spring Sizing Collar included in the kit into the end of the Main Spring. This Collar necks down the Spring, allowing proper clearance between the new Spring Retainer and the Spring.
A6 Follow the instructions included in the Race Tech Shock Spring Compressor tool (TSSC 02) and compress the spring set enough to allow space for the installation of the new Lower Spring Retainer.
A7 Pull the Bumper Cup up far enough to slide the Spring Retainer under it and into place. Make sure the Bumper Cup is located properly inside the Spring Retainer (not cocked sideways) and remove the TSSC 02 Shock Spring Compressor from the shock.
A9 Adjust the Preload Collar to set the Gap between the flanges of the NPL and Go-Between Collars. Use a Caliper or Tape Measure.
A10 Gently tighten the Lock Ring against the Preload Collar being careful not to change the Gap.
NPL Gap is the distance between the NPL Collar Flange and the Go-Between Collar Flange that extends into the NPL Spring.
This distance determines the ride height of the ATV. A larger Gap equals a lower Ride Height; a smaller gap creates a higher Ride Height
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