Cylinder Works Big Bore Ø105mm Cylinder-piston kitRef : CYW00111A / 1018955

CYLINDER WORKS Big Bore Kit Ø105 mm for Yamaha YFM700R Raptor. This high-performance kit combines a Cylinder Works cylinder and a Vertex piston for a bore preparation of 105 mm. Designed for YFM700R quads, it is aimed at riders looking for a reliable solution for engine refurbishment or demanding engine preparation.

• Manufacturer reference: 21004-K02
• Bore diameter: Ø 105 mm (big bore)
• Kit contents: Cylinder Works cylinder, Vertex piston, Cylinder Works top-end gaskets
• Compatibility: Yamaha YFM 700 Raptor (2020–2021 models listed)
• Spare parts references: replacement piston 251056DA, rings 270035, top-end gaskets 604708

Increasing to 105 mm enhances the bore and engine displacement, providing more leeway during preparation (optimization of torque and engine response depending on the rest of the setup). This kit is suitable for high-end refurbishment operations or competition preparation when installed and adjusted by a professional. Complete supply for the top-end, ready to receive the necessary checks and adjustments (ring gap, timing, and alignment check recommended).