Description
Stage6 R/T high-end racing crankshaft 47mm stroke / 105mm conrod Derbi
Stage6 presents this high-end crankshaft for Derbi with 105mm connecting rod and 47mm stroke for 50cc motorcycles with Derbi Euro 3 / Euro 4 engine. It has been specifically developed for the Stage6 R/T 100 FL cylinder kit and meets the requirements of modern 100cc FL racing engines. This architecture ensures optimized engine geometry, precise alignment and efficient power transmission.
Features Stage6 R/T crankshaft Derbi
- Hot-forged 18NiCrMo5 steel (HRC): Maximum reliability and strength.
- CNC-machined connecting rod with double heat treatment: High durability under heavy load.
- Precision grinding and polishing: Excellent surface finish and improved lubrication.
- Optimized balancing with high-density tungsten inserts (17.6 g/cm³) and ultra-light connecting rod (<80 g): Minimizes vibrations and ensures smooth operation even at very high RPM.
- Cold-rolled threads: Increased durability.
- Silver-plated needle bearing: Reliable operation at very high engine speeds.
Compatibility and installation tips Stage6 crankshaft
The racing crankshaft is a perfect match for the Derbi Stage6 R/T 100 cylinder, but is also an excellent choice for all similar high-end cylinders with 47mm stroke / 105 mm connecting rod.
Important note: Before installation, the crankshaft must be thoroughly cleaned with fuel to remove the protective oil. Machining of the crankcase to 81.5 mm is required, and connecting rod clearance must be checked. The use of a new Derbi Stage6 R/T crankshaft bearing kit is also recommended.
Stage6 R/T racing crankshaft Derbi:
- Tuning level: High-end
- Stroke: 47 mm
- Connecting rod: 105 mm
- Crank pin: 20 x 41 mm
- Crank web diameter: 80 mm (crankcase machining to 81.5 mm required)
- Material: 18NiCrMo5 steel
- Weight: 1,96 kg
- Piston pin: 12 mm or 14 mm (depending on bearing)
- Included: 1x small end bearing (12x17x15 mm), 2x crankshaft nut (M12x1.25)
- Compatible with: 50cc motorcycles with Derbi engine from 2006 (Euro 3 and Euro 4)
