Kit Crankshaft HQ Racing Connecting rod CNC and C4 bearings Derbi Euro 3/4/5 VOCA Racing

Voca Racing HQ Racing kit consisting of a Derbi Euro 3/4/5 crankshaft and C4 bearings, intended for compatible Derbi Piaggio Euro 3 D50B0 engines. It is a suitable option for repair, replacement, or engine bottom-end preparation work in setups that require a reinforced crankshaft and bearings prepared for demanding mechanical use.

The Voca Racing HQ Racing crankshaft maintains a standard stroke for Derbi Euro 3 and is designed for performance builds on compatible D50B0 engines. It incorporates a CNC-machined Connecting rod, a 12x17x15 silver Needle bearing, and a laser-engraved logo, offering a configuration intended for high-end builds and sporty use.

Its counterweighted design with aluminum inserts helps reduce the overall weight and improve engine response. In addition, the closed crankshaft design helps increase pre-compression in the crankcase, a common feature in high-performance setups.

The kit is completed with Voca Racing VCR-RD72195/C4 bearings, with C4 specification, common in applications where greater internal tolerance is required against temperature, rotational speed, and high workloads. By including the crankshaft and bearings in the same set, it makes for a more complete and consistent intervention when opening the engine.

The kit includes

• Voca Racing HQ Racing crankshaft VCR-RD70193.HQ
• Voca Racing bearings VCR-RD72195/C4

Crankshaft features

• Voca Racing HQ Racing crankshaft for compatible Derbi Piaggio Euro 3 D50B0 engines.
• Standard stroke for Derbi Euro 3.
• CNC-machined Connecting rod with laser-engraved logo.
• 12x17x15 silver Needle bearing.
• Counterweighted with aluminum inserts to reduce total weight.
• Closed design to promote pre-compression in the crankcase.
• 20 mm crankshaft journals.
• Designed for high-performance builds.
• Capable of operating up to 16,000 rpm according to manufacturer specifications.

Bearing features

• Voca Racing bearings with reference VCR-RD72195/C4.
• C4 specification, suitable for engines with higher operating temperatures and high rotational speeds.
• Intended to replace the bearings during crankshaft installation.
• Recommended for a complete bottom-end engine service.

Application

Kit adaptable to mopeds equipped with a compatible Derbi Piaggio Euro 3 D50B0 engine. Depending on the version, it can be fitted to models such as the Derbi Senda DRD, Derbi Senda Xtreme, Derbi Senda Racing, Aprilia SX 50, Aprilia RX 50, and Gilera SMT/RCR 50 equipped with a Derbi Euro 3 D50B0 engine.

Product details

• Brand: Voca Racing
• Crankshaft reference: VCR-RD70193.HQ
• Bearing reference: VCR-RD72195/C4
• Compatible engine: Derbi Piaggio Euro 3 D50B0
• Stroke: standard
• Crankshaft journals: 20 mm
• Needle bearing: silver 12x17x15
• Recommended use: preparation, repair, or replacement of the lower part of the engine

Important

Before purchase or installation, it is necessary to verify exact compatibility with the vehicle, the year of manufacture, and the engine configuration. Some models may be fitted with different engine versions depending on the year or market.

Installing a crankshaft requires proper tools, checking tolerances, correct bearing installation, and inspection of the assembly before closing the engine. It is essential to carry out balancing checks before installation. Manufacturers may deny the warranty if a balancing fault is detected after the crankshaft has been installed in the engine.