YX - ZR1 172cc Engine Optimized Gearbox (4 Short) GPX Ignition

The YX/ZR1 172cc engine is designed for high performance and reliability, ideal for pit bikes and motard racing.

Here are its main features and technical specifications:

Main features:

• VMC motard gearbox: with long first and second gear (Avotecnica exclusive), optimised for motard competitions and technical sections.
• New CNC Clutch: Redesigned with integrated gear and hub, ensures more efficient power transfer and longer life.
• GPX Ignition: Improved with larger pin, provides more stable and reliable starts.
• Reinforced casings: designed to withstand the most extreme conditions.
• Improved cooling system: ensures optimal temperatures even during prolonged use.
• Oversized oil pump: ensures optimal lubrication.

Technical data:

• Actual displacement: 172cc
• Bore and stroke: 62x57 mm
• Clutch: 5 discs
• Transmission: 4-speed manual (N1234)
• Accessories supplied: gear lever, kick starter lever and intake manifold
• Carburetor and muffler connections: CRF standard

Supply:

Regular supplies every 2 months, to ensure continuity for racing teams or enthusiasts who need constant spare parts.