Motion Pro 50mm / 14mm Fork Cap Wrench for Dual Chamber Showa Fork

The Motion Pro 08-0706 Fork Cap Wrench is a specialized 3-in-1 suspension service tool engineered specifically for modern Showa 49mm Twin Chamber (Dual Chamber) inverted forks. Servicing closed-cartridge forks requires disassembling both the outer fork cap and the inner damping cartridge assembly. Using steel adjustable wrenches, open-end spanners, or pliers rounds off the soft aluminum octagonal cap, mars the anodized coating, and risks galling the fine threads on the outer fork tube.

CNC-machined from 6061-T6 billet aluminum, the 08-0706 wrench combines three essential suspension service functions into a single non-marring tool. One end features a 50mm 8-point (octagonal) box wrench designed to cleanly break loose and torque the top fork cap. The opposite end features a 6-point box wrench sized to unthread the compression base valve assembly directly from the internal damping cartridge. Centered along the wrench body is an integrated 14mm damper rod holding slot, which captures the lower damper rod flats to prevent shaft rotation when removing the bottom rebound center bolt.

Features:

• 3-in-1 Dedicated Service Tool: Integrates a 50mm fork cap wrench, a 6-point base valve socket, and a 14mm damper rod holding slot in a single tool.

• 50mm 8-Point Octagonal Box: Surrounds all eight facets of Showa 49mm outer fork caps to distribute rotational torque without rounding soft edges.

• Cartridge Base Valve Wrench: 6-point box profile provides positive engagement to unthread the upper base valve assembly from the cartridge tube for shim stack tuning and oil changes.

• 14mm Damper Rod Holding Slot: Slips securely over the internal damper rod shaft to hold the rod stationary while unthreading the lower rebound center bolt.

• 6061-T6 Billet Aluminum: Machined from high-strength billet aluminum to provide high rigidity while remaining non-marring on anodized factory suspension components.

• Laser-Engraved Markings: Features permanent laser-etched sizing and alignment markings with a durable blue anodized finish.

• Compact Low-Profile Design: Fits easily inside trackside tool rolls and clears close-tolerance handlebar clamps during on-bike cap loosening.

What's in the Box:

• 1x Motion Pro 50mm / 14mm Fork Cap Wrench for Showa Dual Chamber Forks (Part #08-0706)

Fitment:

• 2019–2027 – Honda CRF450L & CRF450RL

• 2019–2027 – Honda CRF450X

• Works with several other makes and models as well. 

Fitment Notes:

• Fork Platform Compatibility: Engineered specifically for Showa 49mm Twin Chamber (Dual Chamber) coil spring inverted forks.

• Incompatible Systems: Doesnot fit WP XACT/XPLOR 48mm forks, KYB 48mm/49mm closed-cartridge systems, Showa SFF-Air TAC systems, or vintage 47mm Showa twin chamber forks requiring 46mm cap wrenches.

• Upper Triple Clamp Pinch Bolt Protocol: Never attempt to loosen or tighten the 50mm fork cap while the upper triple clamp pinch bolts are torqued. The upper clamp wraps directly around the outer fork tube precisely where the internal fork cap threads engage. Squeezing the tube clamps the fork tube wall against the cap threads, causing severe binding and thread galling if forced.Always loosen the upper triple clamp pinch bolts first while leaving the lower clamp bolts tight to hold the fork tube in place. Use the 08-0706 to crack the cap loose 1/4 to 1/2 turn on the bike, then slide the fork leg out of the clamps to complete disassembly on the bench.

• Damper Rod Extraction (Eliminating Locking Pliers): To extract the closed inner cartridge from the lower fork leg, the center bolt at the bottom of the fork lug must be unthreaded while the internal damper rod is held stationary. Never use locking pliers, standard vice grips, or steel channel locks on the damper rod shaft. Clamping steel jaws onto the precision-ground rod leaves micro-burrs and scratches that immediately tear through the internal cartridge oil seal, resulting in catastrophic cartridge oil loss. Compress the fork spring until the 14mm damper rod flats emerge from the bottom lug, slide the 14mm slot of the 08-0706 over the flats, and hold the wrench firmly while unthreading the rebound bolt with a socket.

• Base Valve Re-threading Precautions: When unthreading and re-installing the base valve using the 6-point wrench end, note that the cartridge tube features extremely fine M32/M34 pitch aluminum threads. When reinstalling the base valve, push down gently against the internal pressure spring and rotate the base valvecounter-clockwise by hand until you feel a distinct mechanical "click" where the thread leads drop into alignment. Thread the assembly in completely by hand before giving it a final snug torque with the 08-0706 wrench.

Part Number: 08-0706