Motore YX 172 Ingranaggi Terza e Quarta CNC, Accensione GPX, Cilindro Nikasil e pistone Forgiato - Preparazione by Tedeschi

YX 172 Engine, Third Gear CNC, GPX Ignition - Setup by Tedeschi

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

Main features:

• VMC motard gearbox: long first and second gear (Avotecnica exclusive), optimised for motard competitions and technical sections.
• New CNC clutch: integrated gear and hub for more efficient power transfer and longer life.
• GPX Ignition: Improved with larger pin, offers 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.

Preparation by Tedeschi

Processing and Optimization:

• Head processing
• Ergal plates
• Duct processing
• Barbell machining
• Edit valve profile
• Cylinder processing
• Change compression ratio
• Base processing
• CNC Third Gears
• Desmo shimming
• Increase clutch spring load
• Replacing 2 heavy duty springs in the clutch
• Removing the starter shaft
• crankshaft centering with a maximum tolerance of 2 hundredths

Technical data:

• Actual displacement: 172cc
• Bore and stroke: 62x57 mm
• Clutch: 5 discs
• Transmission: 4-speed manual (34/13; 29/17; 23/17; 21/20)
• Accessories supplied: gear lever, kick starter lever and intake manifold
• Carburetor and muffler connections: CRF standard

Supply:

The batches are made in minimum quantities.

Each engine is bench-tested before use and run-in to ensure maximum reliability.