Crankshaft Euro 3/4 Derby C.47 Connecting rod 100mm RB Racing

Crankshaft C.47 100 mm connecting rod RB Racing for Derbi Euro 3/4.

The RB Racing C.47 crankshaft for Derbi Euro 3 / Euro 4 is a serious foundation for fitting racing cylinders and getting more real displacement out of the engine. The 47 mm stroke increases piston travel, boosts torque, and makes the engine pull much harder through the mid-range and at high RPM.

The 100 mm machined connecting rod improves the engine’s internal geometry. Being longer, it reduces the piston’s working angle against the cylinder wall, lowers lateral friction, and allows the assembly to spin more smoothly when revving high.

The 20 mm gudgeon pin and the 15 mm width reinforce the connecting rod support area, exactly where the engine takes the most load under hard acceleration. 

The 81 mm webs help fill the crankcase more effectively and work with greater precompression, something essential in tuned 2-Stroke engines. With a weight of 1900 grams, it maintains inertia so the engine runs better and does not bog down when shifting gears.

Technical specifications

• Brand: RB Racing
• Compatible engine: Derbi Euro 3 / Euro 4
• Engine type: 2-Stroke racing
• Stroke: 47 mm
• Connecting rod: 100 mm machined
• Width: 15 mm
• Gudgeon pin: 20 mm
• Web: 81 mm
• Weight: 1900 grams