Crankshaft

Full Metal. Full Stroke.

Designed for the BWS 100 and ZUMA 100 engine, this full metal crankshaft features an extended stroke of 53mm — an increase of 5.2mm over the stock specification — for use in modified engine configurations. Precision-machined for consistent dimensional accuracy and stable engine operation. Confirm cylinder kit compatibility and engine build requirements before installation.

🔹 Highlights

• Full Metal Construction — precision-machined crankshaft for consistent dimensional accuracy and stable engine assembly
• 53mm Extended Stroke — 5.2mm increase over stock stroke specification for modified engine configurations
• Precision-Machined Dimensions — consistent journal geometry supports stable crankshaft operation within the engine case
• BWS 100 / ZUMA 100 Fitment — dimensioned to match BWS 100 and ZUMA 100 engine specifications
• Single-Component Package — supplied as crankshaft only for engine build applications

✔ Product Specifications

• Type: Full Metal Crankshaft
• Stroke: 53mm (+5.2mm)
• Fitment: BWS 100 / ZUMA 100
• Focus: Engine stroke upgrade
• Package Includes: Crankshaft × 1

🔧 Installation Notes

• Confirm cylinder kit compatibility with the 53mm stroke specification before installation
• Engine crankshaft installation is recommended to be carried out by a technician with relevant experience
• Confirm piston clearance and compression seal integrity after assembly
• A proper engine break-in procedure is recommended before returning to normal operation

Power You Can Trust.

Bakelite Core. Extended Stroke.

Designed for the BWS 100 and ZUMA 100 engine, this Bakelite crankshaft features an extended stroke of 52mm — an increase of 4.2mm over the stock specification — for use in modified engine configurations. The crankpin contact area incorporates a bakelite material insert, distinguishing this variant from the full metal construction. The crankshaft body is precision-machined for consistent dimensional accuracy and stable engine operation. Confirm cylinder kit compatibility and engine build requirements before installation.

🔹 Highlights

• Bakelite Crankpin Insert — bakelite material applied at the crankpin contact area, a structural distinction from full metal variants
• 52mm Extended Stroke — 4.2mm increase over stock stroke specification for modified engine configurations
• Precision-Machined Construction — consistent dimensional accuracy supports stable engine assembly and operation
• BWS 100 / ZUMA 100 Fitment — dimensioned to match BWS 100 and ZUMA 100 engine specifications
• Single-Component Package — supplied as crankshaft only for engine build applications

✔ Product Specifications

• Type: Bakelite Crankshaft
• Stroke: 52mm (+4.2mm)
• Fitment: BWS 100 / ZUMA 100
• Focus: Engine stroke upgrade
• Package Includes: Crankshaft × 1

🔧 Installation Notes

• Confirm cylinder kit compatibility with the 52mm stroke specification before installation
• Engine crankshaft installation is recommended to be carried out by a technician with relevant experience
• Confirm piston clearance and compression seal integrity after assembly
• A proper engine break-in procedure is recommended before returning to normal operation

Power You Can Trust.

Enhanced Balance. Stronger Torque Transfer. Built for Performance Beyond Stock.

This Performance Bakelite Crankshaft for YAMAHA Force 1 ZR (F1ZR) (for Indonesia) is designed to exceed OEM durability and balance standards. Featuring precision-ground journals and bakelite side inserts, it delivers smoother rotation, reduced friction, and enhanced torque transmission under high RPM conditions. Ideal for riders seeking stable power delivery and improved performance output in modified engines.

🔹 Highlights

• 52mm Performance Stroke — Matches stock dimensions with superior strength and balance

• Bakelite Side Inserts — Reduce friction and heat buildup for smoother rotation

• Reinforced Crank Webs — Enhanced rigidity for stable operation under tuning setups

• Precision Machining — Ensures perfect alignment and long-term reliability

• Tuning-Ready Design — Supports modified or performance-focused builds

✔ Product Specifications

• Type: Bakelite Crankshaft (Performance Upgrade)

• Stroke: 52mm

• Fitment: YAMAHA Force 1 ZR (F1ZR) (for Indonesia)

• Focus: High-RPM balance & torque transmission

• Package Includes: Complete crankshaft assembly ×1

🔧 Installation Notes

• Confirm stroke and model compatibility before installation

• Recommended for tuned or upgraded engines

• Ensure proper lubrication of bearings and seals

• Align timing marks accurately for optimal performance

Power You Can Trust.

Balanced Precision. Stronger Torque. Built for Reliable Power Upgrade.

The Bakelite Crankshaft for YAMAHA RX-King is engineered for riders seeking smooth performance and improved torque delivery. Available in 50mm (STD) and 52mm (+2.0) stroke options, this crankshaft combines precision balancing with durable bakelite side inserts to reduce friction and maintain stability at high RPM. Perfect for both stock rebuilds and displacement upgrades, it ensures consistent performance and long-term reliability.

🔹 Highlights

• Two Stroke Options — 50mm (STD) for OEM restoration / 52mm (+2.0) for power upgrade

• Bakelite Side Inserts — Reduce friction and heat buildup for smoother rotation

• Reinforced Crank Webs — Provide excellent strength for tuned or racing engines

• Precision Machining — Ensures perfect balance and extended durability

• Tuning-Ready Compatibility — Fits RX-King engine cases without modification

✔ Product Specifications

• Type: Bakelite Crankshaft

• Stroke: 50mm (STD) / 52mm (+2.0)

• Fitment: YAMAHA RX-King

• Focus: Torque delivery & high-RPM stability

• Package Includes: Complete crankshaft assembly ×1

🔧 Installation Notes

• Confirm stroke type before installation

• Ensure proper lubrication of bearings and seals

• Use new gaskets during reassembly for optimal sealing

• Align timing marks precisely to maintain performance

Power You Can Trust.