BWS/ZUMA Engine & Cylinder Parts
BWS100/ZUMA100 Cylinder Set
Cast-iron durability—56/57mm bolt-on options for BWS100 / ZUMA100.
The BWS100 / ZUMA100 Cylinder Kit comes in 56mm and 57mm bores for rebuilds or displacement upgrades. Its cast-iron cylinder body provides a wear-resistant bore with stable clearances, while precision machining keeps piston travel smooth and sealing consistent.
🔹 Cast-Iron Cylinder Body — Durable, wear-resistant bore with stable thermal behavior
🔹 Two Bore Options — 56 / 57mm to match your build goals
🔹 Precision Machining — Smooth piston motion and reliable ring seal
🔹 OEM-Fit Interfaces — Stock-layout mounting for accurate, hassle-free assembly
🔹 Complete Kit — Cylinder, piston, rings, pin, circlips, gasket included
Product Specifications
✔ Bore Sizes: 56mm / 57mm
✔ Material: Cast-iron cylinder
✔ Fitment: YAMAHA BWS100 / ZUMA100 models (year/market dependent)
✔ Focus: Durable bore, consistent sealing, straightforward install
✔ Package Includes: Cylinder, piston, piston rings, piston pin, circlips, cylinder gasket
Installation Notes
• Confirm original bore and model year before installation.
• For bore-up builds, verify cylinder head and gasket compatibility; recheck fueling (carb jetting / air–fuel).
• Follow standard break-in for new rings; re-torque fasteners after initial heat cycles.
Power You Can Trust.
Video: https://youtu.be/qfILLSiyMG0