TUSK Crankcase Splitter — Adjustable Arms with 6mm & 8mm Bolts for Vertically Split 2- and 4-Stroke Engines

The TUSK crankcase splitter is a heavy-duty, adjustable tool that safely pushes crank assemblies free from vertically split 2‑stroke and 4‑stroke engine cases.

Designed for motorcycle, ATV and small engine mechanics, this separator streamlines the most awkward part of engine teardown: separating the case halves without damaging bearings, shafts or mating surfaces. The kit includes adaptable arms plus both 6mm and 8mm mounting bolts so you can position the splitter on a variety of bolt patterns. Built for repeatable shop use, it reduces prying and improvised methods that risk scoring or warping case faces.

How does the TUSK splitter remove a crank assembly from vertically split cases?

The tool uses a central forcing bolt and adjustable arms to apply even pressure that pushes the crank out while the case halves remain supported. Instead of levering or hammering, the splitter transfers controlled axial force to separate mating faces cleanly. This preserves bearing seats and alignment features for easier reassembly.

• Central drive bolt applies steady, controllable axial force
• Adjustable arms attach to existing case studs or tapped holes
• Even pressure prevents tilting and reduces sealing surface damage

What mounting options does it include and why do they matter?

Because engine manufacturers use different stud sizes and patterns, the TUSK splitter ships with both 6mm and 8mm bolts to fit common configurations. The adjustable arms slide to match staggered or widely spaced studs, making the tool compatible with most vertically split 2‑ and 4‑stroke crankcases. Proper mounting keeps the forcing bolt aligned with the crankshaft centreline for safe separation.

• 6mm and 8mm mounting bolts included for broader compatibility
• Sliding arm channels suit varied stud spacing and angles
• Secure bolting prevents slippage during extraction

Will this tool protect my engine parts during disassembly?

Yes — the splitter is engineered to apply uniform force rather than concentrated leverage, which lowers the risk of cracked cases, damaged bearings or warped surfaces. By guiding the crank assembly straight out, it reduces lateral stresses on seals and shafts. Still, follow standard procedures: support the case halves and inspect mating surfaces before pressurized reassembly.

• Guided axial extraction reduces bearing and journal damage
• Avoids hammering or prying that can gouge case faces
• Works with supported case halves to maintain alignment

How simple is it to set up and use in a home or professional shop?

Setup is straightforward: mount the adjustable arms to existing case studs using the included bolts, align the forcing bolt with the crank, and turn the drive bolt to separate the halves. No specialized presses or fixtures are required, though a stable workbench and proper supports are recommended. Its repeatable operation makes it practical for one-off repairs or busy shop workflows.

• Quick assembly with common wrenches and the supplied bolts
• Fits a range of engine makes with minimal adjustments
• Portable enough for mobile mechanics and compact shops

Who this tool is for: The TUSK crankcase splitter is aimed at motorcycle and ATV technicians, DIY engine rebuilders, and small‑engine specialists who regularly service vertically split crankcases. If you remove crankshafts from 2‑stroke or 4‑stroke engines and want a safer, faster alternative to improvised separation methods, this kit offers the adjustability and hardware needed for reliable, damage‑minimizing disassembly.