TUSK crankcase splitter tool for vertically split 2‑stroke & 4‑stroke engines — adjustable arms, includes 6mm & 8mm bolts

The TUSK crankcase splitter is a compact, adjustable puller that safely separates vertically split 2‑stroke and 4‑stroke crankcases by pushing the crank assembly out of the case halves.

Designed for motorcycle and powersports mechanics, the TUSK crankcase splitter streamlines the most difficult step of engine teardown: separating the two halves of a vertically split crankcase without damaging mating surfaces or bearings. Built with adjustable arms and supplied 6mm and 8mm mounting bolts, this tool adapts to common bolt patterns so you can apply even, controlled force directly to the crankshaft or case bosses. It’s a practical addition to a home garage or a professional toolbox when you need a reliable, repeatable method to split cases cleanly.

How does the TUSK splitter avoid damaging crankcase surfaces?

The splitter centralizes force so the crank assembly is pushed straight out of the opposing half, preventing uneven leverage that can chip or gouge sealing surfaces. Its adjustable arms distribute load across multiple mounting points for a balanced pull.

• Adjustable arms fit a variety of bolt patterns to avoid concentrated pressure.
• Included 6mm and 8mm bolts let you match original crankcase fasteners.
• Central pushing stud applies axial force to the crank assembly, not the case lip.
• Compact construction reduces risk of slipping or sudden torque shifts.

Will this tool work on my specific engine model?

The TUSK crankcase splitter is intended for vertically split 2‑stroke and 4‑stroke engines with accessible mounting points around the crankcase seam. Because the arms are adjustable and multiple bolt sizes are provided, it fits many common bolt patterns, though extremely rare or proprietary layouts may need custom hardware.

• Adjustable arm span accommodates a wide range of crankcase diameters.
• 6mm and 8mm mounting bolts included for common fastener sizes.
• Suits most dirt bikes, ATVs, UTVs, and small engine applications with vertical split cases.
• For unusual patterns, longer bolts or adapters can often be substituted.

How do I use the splitter safely and efficiently?

Mount the adjustable arms to the crankcase using the included bolts so they register on solid bosses or threads. Thread the center pushing stud until it contacts the crankshaft or internal spacer, then turn steadily to separate the halves—avoid sudden, high-torque impacts.

• Select proper bolt threads (6mm or 8mm) for secure attachment.
• Verify arms are evenly spaced and tightened to prevent slippage.
• Turn the center stud slowly for controlled separation of the crankcase halves.
• Inspect sealing surfaces after separation and clean mating faces before reassembly.

What are the tool’s construction and included components?

The splitter is built to tolerate workshop use, with adjustable metal arms and a central pressure stud designed to apply steady axial force. The kit comes with both 6mm and 8mm mounting bolts so you can mount the arms directly to the case without improvising fasteners.

• Durable metal arms engineered for repeated use.
• Central pushing stud for controlled axial force application.
• Included 6mm and 8mm mounting bolts to match common crankcase threads.
• Compact profile that fits in tight engine compartments.

Who is this for? The TUSK crankcase splitter is ideal for DIY mechanics, performance tuners, and professional shops that regularly work on dirt bikes, ATVs, small motorcycles, and other machines with vertically split crankcases. If you need a dependable, easy‑to‑use method to separate crankcase halves without risking surface damage, this tool simplifies the job and reduces the chance of costly mistakes during teardown.