Motion Pro 50mm WP Fork Cap Wrench

The Motion Pro 08-0764 Fork Cap Wrench is a specialized 2-in-1 suspension service tool engineered specifically for WP 4860 MXMA Dual Chamber (Closed Cartridge) inverted 48mm front forks. Disassembling closed-cartridge suspension requires unthreading the top fork cap assembly to extract the internal cartridge and securing the internal damper rod to remove the lower rebound bolt. Using steel adjustable wrenches, open-end spanners, or universal sockets mars the anodized finish, rounds off soft aluminum hex points, and slips against narrow damper rod flats.

CNC-machined from billet 6061-T6 aluminum and finished in durable anodized blue, the 08-0764 combines a precision 50mm 6-point (hexagonal) box wrench with an integrated 12mm damper rod holding slot. The 6-point box profile provides complete contact along all six facets of the WP cap to break loose factory torque without deforming the aluminum cap. The 12mm slot slips securely onto the damper rod flats when the spring is compressed, holding the rod stationary so the bottom rebound center bolt can be unthreaded without scoring the precision-ground shaft.

Features:

• Dedicated WP Closed-Cartridge Tool: Engineered specifically for WP 4860 MXMA 48mm dual-chamber inverted forks found on KTM, Husqvarna, and Husaberg motorcycles.

• Precision 50mm 6-Point Hex Box: Encloses all six points of WP 50mm hex caps to distribute torque evenly and eliminate rounded edges on soft aluminum caps.

• Integrated 12mm Damper Rod Slot: Captures damper rod wrench flats to hold the rod stationary while unthreading the lower rebound center bolt.

• 6061-T6 Billet Aluminum: Delivers the structural rigidity needed to break loose factory-torqued caps while remaining non-marring on anodized components.

• Non-Marring Suspension Protection: Replaces steel sockets and adjustable wrenches that damage fork caps and bind outer tube threads.

• Laser-Engraved Markings: Features permanent laser-etched sizing and Motion Pro branding with an anodized blue protective finish.

• Slim Clearance Profile: Low-profile handle design clears handlebars and number plates to loosen caps while forks remain mounted in triple clamps.

What's in the Box:

• 1x Motion Pro 50mm / 12mm WP Fork Cap Wrench (Part #08-0764)

Fitment:

• KTM EXC / XC-W Six Days models equipped with WP Closed Cartridge forks

• 2008–2016 – KTM 150–500 XC / XC-F models equipped with WP Closed Cartridge forks

• 2007–2015 – KTM 125–450 SX / SX-F models equipped with WP Closed Cartridge forks

• 2014–2016 – Husqvarna TC / FC / TE / FE models equipped with WP 48mm Closed Cartridge forks

• 2009–2017 –  Husaberg 125–570 TE / FE / FX models equipped with WP Closed Cartridge forks

Fitment Notes:

• CRITICAL INCOMPATIBILITY WARNING:

  • DoesNOT fit WP 4CS forks (requires a dedicated 4-pin/castle tool).

  • DoesNOT fit WP XPLOR 48 forks (requires Motion Pro 08-0678 or 08-0708).

  • DoesNOT fit WP AER 48 / XACT air forks or WP open-bath forks.

  • DoesNOT fit Showa 49mm forks (which require an 8-point 50mm wrench, Motion Pro 08-0706) or KYB 48mm forks (which require a 49mm wrench, Motion Pro 08-0429).

• 6-Point Hex vs. 8-Point Octagonal Distinction: Do not confuse this 50mm 6-point wrench with the 50mm Showa wrench (Motion Pro 08-0706). Showa 49mm forks utilize an8-point octagonal cap, whereas WP 4860 Closed Cartridge forks utilize a6-point hexagonal cap. Applying an 8-point wrench to a 6-point WP cap places load solely on the sharp corners of the hex flats, rounding the aluminum cap immediately. Always inspect your fork cap to confirm it has six distinct flats before applying torque with the 08-0764.

• Upper Triple Clamp Pinch Bolt Protocol: Never attempt to loosen the 50mm WP cap while the fork leg is fully clamped in the upper triple clamp. The upper clamp wraps directly around the outer fork tube precisely where the cap threads mate. Tightening the upper clamp compresses the tube against the cap threads, causing severe binding and thread galling if forced.Always loosen the upper triple clamp pinch bolts first, leave the lower triple clamp bolts torqued to keep the fork tube stationary, and crack the cap loose 1/4 to 1/2 turn using the 08-0764 on the bike. Once cracked loose, loosen the lower clamp and slide the fork tube down to finish disassembly on the bench.

• Damper Rod Protection (Eliminating Locking Pliers): To separate the inner cartridge from the lower axle lug, compress the outer fork tube against the internal spring until the 12mm damper rod flats emerge from the bottom. Slide the 12mm slot of the 08-0764 over the flats to hold the rod stationary while unthreading the lower rebound center bolt with a socket. Never use steel vise grips, pliers, or channel locks on the damper rod. Even minor micro-scratches or burrs on the shaft will tear the cartridge seal head and internal O-rings, leading to complete internal damping loss.

• Reassembly Torque & O-Ring Sealing: WP fork caps utilize an internal radial O-ring to maintain hydraulic sealing against the outer tube wall; they do not rely on high thread torque. Clean the threads, coat the O-ring with fresh suspension fluid, and tighten the cap into the outer tube until snug (typically15–22 lb-ft / 20–30 Nm). Once the forks are reinstalled in the triple clamps, torque the upper triple clamp pinch bolts strictly to factory specification (typically17 Nm / 12.5 ft-lbs). Over-torquing upper triple clamp pinch bolts deforms the outer tube, pinching the cap threads and creating mid-stroke suspension harshness.

Part Number: 08-0764