Crankshaft Derbi Euro 3/4 C.44.9 Connecting rod 90mm RB Racing

Crankshaft C.44.9 90 mm connecting rod RB Racing for Derbi Euro 3/4.

The RB Racing C.44.9 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 44.9 mm stroke increases piston travel, raises torque, and makes the engine pull much harder through the mid-range and at high RPM.

The 90 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 you are running at high revs.

The 77 mm webs help fill the crankcase better and work with greater pre-compression, something essential in tuned 2-Stroke engines. With a weight of 1723 grams, it maintains inertia so the engine spins better and does not bog down when shifting gears.

Technical characteristics

• Brand: RB Racing
• Compatible engine: Derbi Euro 3 / Euro 4
• Stroke: 44.9 mm
• Connecting rod: 90 mm machined
• Web: 77 mm
• Weight: 1723 grams