DESCRIPTION

NEW EVP TAPP CLUTCH UPDATES (2024):

• Roller Spider replaces the original button spider to reduce friction between spider and movable sheave for quicker power delivery, better belt grip, lower belt temps and smoother engagement.
• Center bearing: new black nitrate coating for hardness, corrosion resistance and reduced friction.
• Larger roller: increased from 2mm to 3mm for improved bearing longevity under high horsepower and harsh conditions.
• Post: more material and updated heat-treat allow higher torque without slipping on the shaft (for high‑hp builds/drag setups).
• Moveable sheave: added material reinforces clutch towers for greater load capacity.
• Clutch cover: billet aluminum with larger windows to accept additional weight without modification.

• Calibrations: stock through EVP Dynomite (DM) and Desert Storm (DS) turbo upgrades.
• Intended use: tuned to work with the EVP STM Tuner secondary, or OEM secondary with EVP internals including Shift‑Tek Helix and Spring.
• All kits include full standard weight kit plus tungsten TAPP Clutch Race Weights (set of 8).
• Durability: billet aluminum and high‑tech materials for extreme heat resistance. EVP Spec TAPP primaries handle ~200–500+ hp; OEM primary is reliable up to about 300 hp.
• Adjustable: two‑sided ramps swap quickly. External clickers change shift pattern. Roller arms accept added/removed mass; various springs available.
• Cooling & response: ventilated, multi‑angle curved sheaves reduce belt temps and improve throttle response. Ramp system yields smooth, quiet operation.

Disclaimer: EVP calibrated TAPP primaries may require minor calibration changes. For tuning support, see instructions or contact technical department.

Tech support: EVP team available 8:30am–5:00pm CST. (715) 247-3862

NOTES FOR RZR'S WITH P90X CLUTCH (2020-'22 Pro XP, 2021 only XP Turbo/S, & 2022-'23 Turbo R):

• To remove OEM P90X primary use EVP Clutch Puller For Polaris RZR Turbo R, Pro XP and '21 XP Turbo/S (P/N 875FP0010): Product Link.
• To remove the TAPP primary from listed cars use RZR XP Turbo/S Clutch Puller Tool (P/N 875FP0004): Product Link.
• To provide proper clearance install the EVP Clutch Cover Spacer Kit for Polaris RZR Pro XP & Turbo R.

FITMENT

2020+ Polaris RZR Pro XP
2022+ Polaris RZR Turbo R

CALIBRATION GUIDE

There are 4 main adjustable components in an EVP Spec TAPP Clutch:

• Ramp Profile - Shipped with pre‑chosen ramps. Changing profile alters shift behavior and should be done by an experienced tuner.
• Ramp Angle - Adjustable externally with Quick Shift bolts. Higher setting = higher RPM. Always adjust in pairs opposite each other to avoid imbalance.
• Roller Size - Three sizes: standard, +1mm, +2mm. Larger rollers quicken low‑end shift, lower full‑shift RPM; smaller rollers slow shift and raise full‑shift RPM. Change in opposing pairs only.
• Weight Adjustment - Via set screws in arms and washers on roller thru bolt. Add weight to lower RPM; remove weight to raise RPM. Set screws affect low speed; roller bolt weight affects high speed. Adjust evenly in pairs to avoid failure.

INSTRUCTIONS

Polaris RZR Pro XP/Turbo/S Tapp Primary Clutch Kit by EVP.MOde

Manufactured by Evolution Powersports. Official specs and resources: EvoPowersports.com.

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