EVOLUTION POWER SPORTS TAPP Primary Clutch Kit Instruction Manual

EVOLUTION POWER SPORTS TAPP Primary Clutch Kit

SKU(s)

INCLUDED PARTS

(1) TAPP Uncalibrated Clutch

(4) Set of Rollers
(4) Set of Ramps
(1) Primary Clutch Spring
(1) Primary Clutch Cover

REQUIRED TOOLS

Allen Sockets, Rachet

Torque Wrench
Blue Loctite
Allen Wrenches
Clutch Compressor Tool

Installing the Primary TAPP Clutch
We have found the best way to install the TAPP clutch is by the “valve lapping” technique between the clutch to the engine crankshaft. This should be done every time you remove the clutch from the engine crankshaft to ensure there is a perfect mate between the clutch tapper and the crankshaft taper not allowing the clutch to spin on the crank. We recommend Permatex™ fine grit.

Step 1: Put nitrile gloves on, and lightly apply the Valve Grinding Compound onto the crankshaft taper and clutch taper.
Step 2: Slide the clutch onto the crankshaft, and spin the clutch in one direction, 25 cycles with your hands. Pull the clutch off and look for a uniform grey section around the crank. When a new crank is installed, you must do this three times, or until uniform all around the crank.
Step 3: Once complete, brake clean all the valve lapping compound off the crankshaft and clutch. If you don’t remove all the compound, you will ruin the crankshaft and clutch taper.

Installing the Primary Clutch Bolt

If you are using the Can-Am OEM bolt, you will need to torque the primary bolt down to 89 ft/lbs and drive the car up to 4000rpms, then re-torque to 89 ft/lbs. Repeat this process while slowly raising the RPMs each time. Do this until you can make a few wide-open pulls without the bolt losing torque to ensure the primary bolt is torqued completely or it can come off. EVP designed and built a primary clutch bolt specifically for the TAPP clutch that outperforms anything else on the market [X3 XR Series Primary Clutch Bolt, TAPP (SKU:404FC0039)]. If you are using our recommended XR Series Clutch Bolt, you will need to follow the same process, but torque to 110 ft/lbs. instead. It usually does not take more than 3 re-torque cycles before our bolt stops losing torque.

• 2022+ Pro R: Reuse OEM clutch bolt with supplied spacer
• 2020+ Can-Am X3: You must remove the clutch cover liner or the Tappclutch cover will rub.
• 2020+ Pro XP/ Turbo R: You must purchase an EVP clutch cover shim over the clutch cover or the Tapp will rub on the outer cover.
• 2017-2021 XP Turbo/S: EVP also has a clutch cover shim kit allowing more room for the Tapp.

Adjusting the TAPP Clutch
There are (4) main adjustable components on the TAPP primary clutch: Ramp Profile, Ramp Angle, Roller Size, and Adjustable Weights. Always use Blue Loctite when adjusting the weights.

Adjusting Ramp Angle
The ramp angle in your TAPP Clutch is adjustable from the outside via the use of the Quick Shift Bolts. As with other clicker style clutches the higher the number, the higher the RPM. This will mainly affect the full shift speed but also affects the engagement and low speed slightly. On the TAPP clutch, each ramp has its quick clicker adjustments. Each clicker has (6) adjustments. Each click will add or subtract 25rpm but they need to be done in opposite pairs
adding/subtracting 50rpm.
IMPORTANT – Always adjust the ramp angle in pairs across from each other, if you do not the clutch will be out of balance.

Adjusting Ramp Profile
Your TAPP clutch comes with a set of (4) pre-chosen ramps that have been tested in many scenarios and are calibrated for your vehicle setup. Each ramp has an “A” profile side and a “B” profile side. The “A” side will always have lower engagement, “B” side will have higher engagement. Changing the profile of the ramp will have many effects on the shift profile including engagement rpm and back shift. This should only be done by an experienced tuner.
IMPORTANT – Always adjust the ramp profile in pairs across from each other, if you do not the clutch will be out of balance.

Medium/High
1335 Concave| A Side 2000+ rpm B Side 3000+ rpm| Low/Medium
1336 Concave| A Side 1700+ rpm B Side 4500+ rpm| Low/High**

How to Flip TAPP Ramps
If you need to make drastic changes to your engagement RPM, for example, if you were changing from trail riding to drag racing, you’re going to need to flip your ramps around. This can be done with the clutch on the car and the cover still on. Every TAPP ramp has two sides, side A and side B. Side A is always the lower engagement. With the 1335 ramps, you will be at 2000-2500rpm engagement on side A, and 3000-3500rpm engagement on side B. You can also set two ramps to side A and two ramps to side B to meet somewhere in the middle. The 1335 ramps do not require any other changes to be made to the weight setup as the profile is very similar on both sides. Other ramps such as the 1336 or 1328 may require further clutching adjustments to be made when you flip your ramps around. Please contact us for further assistance if needed.

1. Remove the two Allen screws holding the ramp down.
2. Remove the ramp, and reinstall it with the desired side facing up (towards the roller).
3. Use blue Loctite to reinstall the ramp bolts.

Adjusting Roller Size

There are 3 sizes of rollers available: standard, 1mm oversize, and 2mm oversize. Bigger rollers make the low-end “quicker RPMs” but shift out quicker and lower the full shift RPM. Smaller rollers make the engine slower shift and raise the full shift RPM. This has to do with the angle of the arms combined with the weight difference of the rollers. The roller assembly consist of a roller, axel, and two washers.
IMPORTANT – As with the ramp angle roller size must be done in pairs across from each other, failure to do so will result in an imbalance of the clutch and possibly failure.

Roller Assembly: Roller, Axle, (2) washers located on the outside of the roller.

Adjusting Weight Overview
The weight in the arms can be adjusted in two ways: set screws in the arms, and washers on the roller thru bolt. Your clutch was shipped with a standard tuning kit. As with all other clutches add weight to lower RPM, and remove weight to raise RPM. A good rule of thumb when choosing how much weight to add or remove from your clutch is that 1 gram per arm equals just under 100 rpm. For example, if you’re targeting a 9000rpm shiftout and you’re only hitting 8600 at WOT, you would want to remove roughly 5 grams of weight per arm as a starting point. Adjust this as needed for your application.

IMPORTANT – As with all other adjustments, do this evenly and only in pairs across from each other, failure to do so will result in an imbalance of the clutch and possible failure. Adjusting Weight on the Arms: Allen screws must be added in pairs opposite to one another. Allen screws are .500” weighing 2.7 grams. Adding two Allen screws will add 5.2 grams. Added all eight Allen screws will add 20.8 grams.

Adjusting Weight on the Roller
The TAPP clutch includes a roller weight kit with the following parts.

TAPP Primary Spring(s

__

Black

| __

140/210

Red| 160/270
Orange| 40/210
Yellow| 40/300
Green| 70/160
Blue/Orange| 185/320

Thank you for choosing Evolution Powersports products. If you require further assistance, please call our Tech Support 715-247-3862
Note: This product is exempt from the emission standards and related requirements of 40 C.F.R. § 1051 as provided by 40 C.F.R. § 1051.620, and California law [e.g., vehicle code§§ 27156 and 38391]. This product is sold only for use in connection with EPA certified, purpose-built, nonroad vehicles used solely for closed course, nonroad competition/racing and not used for any recreational purpose or on public highways or right of ways maintained by and open to the public. This product is sold only in connection with machines that do not fall under state and/or federal noise or emission standards/regulations. Purchasers who/purchase this product represent and warrant that the product is purchased only in connection with EPA-certified, emission-regulations-exempt and noise regulations-exempt competition/racing vehicles as interpreted under applicable state and/or federal law.
Questions: Call Evolution Powersports at 715-247-3862.

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