Long Piston Tray Set for BMW Airhead Engines

The Workshop Rebuild Long Piston Tray Set is a purpose-built service tool designed specifically for BMW Airhead engines using 94 mm pistons.

This tool safely supports the piston when the cylinder is removed, preventing unnecessary stress on the connecting rod and crankshaft during service work.

More than just a support fixture, it also functions as a precision jig for checking clearances while rotating the engine by hand. The tray replicates a quarter section of the cylinder and maintains the correct installed cylinder height, allowing accurate verification of piston-to-valve clearance during camshaft setup and timing procedures.

Whether you are assembling a fresh engine or validating cam timing, this tool provides stability, repeatability, and peace of mind during critical measurements.

Please review the short demonstration video below to see how the tool is used to verify piston-to-valve clearance during engine rotation: BMW R100 Engine Rotation

Features

• Designed for BMW Airhead engines with 94 mm pistons
• Supports piston securely with cylinder removed
• Replicates installed cylinder height for accurate clearance checks
• Ideal for camshaft setup and valve clearance verification
• Manufactured from durable, high-strength blue polymer
  

What's included: 

• 2 x Long Piston Trays (94mm Diameter)

Model fitment:

• R100CS (81-84)
• R100S (77-80)
• R100/7 (77-78)
• R100T (79-80)
• R100RS (77-92)
• R100RT (78-96)
• R100R / Mystik

If you have a smaller-displacement engine and require a custom size, please contact us

Disclaimer:

Images showing the piston and engine block are for demonstration purposes only. This listing includes the Long Piston Tray Set only. No engine components are included.