Product Description
TAIDA 41.2mm Stroker Crankshaft Kit for Yamaha JOG50 & Minarelli 2-Stroke Engines
Includes Bearings & Oil Seals | 10mm Wrist Pin | Premium Performance Upgrade
Increase displacement, torque, and overall engine performance with the TAIDA 41.2mm Stroker Crankshaft Kit, engineered specifically for 50cc liquid-cooled and air-cooled Minarelli-based 2-stroke engines. Precision manufactured from high-strength forged steel, this crankshaft increases stroke from the factory 39.2mm to 41.2mm, adding displacement while significantly improving low and mid-range torque.
Unlike stock crankshafts, the TAIDA stroker crank is built for higher RPM, increased cylinder pressures, and performance engine builds. This complete kit includes premium crankshaft bearings and oil seals, making it an excellent choice for engine rebuilds and big bore conversions.
Performance Benefits
- Increases crankshaft stroke from 39.2mm to 41.2mm
- Adds engine displacement when paired with big bore cylinders
- Improved low-end torque
- Stronger mid-range acceleration
- Increased horsepower potential
- Faster throttle response
- Built for higher RPM operation
- Precision balanced for smooth engine performance
- Heavy-duty forged construction
- Excellent upgrade for performance and racing builds
Features
✔ Genuine TAIDA Performance
✔ 41.2mm Stroker Crankshaft
✔ Precision balanced assembly
✔ Heavy-duty forged connecting rod
✔ 10mm wrist pin
✔ High-strength forged steel construction
✔ Includes premium crankshaft bearings
✔ Includes new crankshaft oil seals
✔ Direct replacement for compatible Minarelli-based engines
✔ Designed for high-performance engine builds
Specifications
Brand: TAIDA
Stroke: 41.2mm
Stock Stroke: 39.2mm
Stroke Increase: +2.0mm
Wrist Pin Size: 10mm
Connecting Rod: Heavy-Duty Forged Steel
Crankshaft Material: Precision Forged Steel
Balance: Factory Precision Balanced
Engine Type: 2-Stroke
Installation: Complete Crankshaft Replacement
Package Includes
- 1 × TAIDA 41.2mm Stroker Crankshaft
- 2 × Premium Main Bearings
- 2 × Crankshaft Oil Seals
Ready for installation during engine rebuilds or performance upgrades.
Engine Compatibility
Fits many Minarelli-based 50cc 2-stroke engines including:
- Yamaha JOG50
- Yamaha JOG LC
- Yamaha Aerox 50
- Yamaha BWS / Zuma 50 (Minarelli models)
- Yamaha 1PE40QMB
- Minarelli Horizontal Engines
- Jog-based 2-Stroke Engines
Always verify your engine model before purchasing.
Perfect For
- Big Bore Cylinder Kits
- Performance Engine Rebuilds
- Racing Engines
- High Compression Builds
- Ported Cylinders
- Ceramic Cylinder Kits
- Street Performance Scooters
- Track Builds
Recommended Supporting Upgrades
For maximum performance, pair this crankshaft with:
- TAIDA 47mm Big Bore Cylinder Kit
- Performance expansion chamber exhaust
- Performance carburetor
- High-flow reed valve
- Performance CDI
- Lightweight variator
- Upgraded clutch components
- Premium synthetic 2-stroke oil
Why Upgrade to a Stroker Crank?
Increasing crankshaft stroke increases the piston's travel inside the cylinder, creating greater engine displacement and improved cylinder filling. The result is:
- More torque throughout the RPM range
- Faster acceleration
- Increased horsepower potential
- Better throttle response
- Stronger pulling power
- Improved performance when combined with big bore cylinders
Installation Notes
- Professional installation is recommended.
- Always replace crankshaft bearings and seals during installation.
- Verify crankcase clearances when installing larger displacement cylinder kits.
- Proper carburetor jetting is required after increasing engine displacement.
- Follow the recommended engine break-in procedure before sustained high-RPM operation.
Important Notice
This performance crankshaft is intended for off-road, racing, or closed-course competition use where permitted by law. Always verify fitment before purchasing and ensure all supporting engine components are properly matched for safe, reliable operation.
