Aprilia RS 125 [2023-2024] - H2O cylinder-piston kit - Ø67mm

MALOSSI H2O cylinder-piston kit with Ø 67 mm

The H2O cylinder-piston kit from MALOSSI is intended for the Aprilia RS 125 built in 2023-2024. With a Ø 67 mm bore, 47 mm stroke and 166 cm³ displacement, the big bore kit is aimed exclusively at use in motorsports. The components are machined on high-precision CNC machines; the piston-cylinder fit is 0.05 mm.

Cylinders and heat exchange

• Bore: Ø 67 mm
• Stroke: 47mm
• Displacement: 166 cm³
• Compression ratio: 12:1
• Newly calculated, extra large heat exchange surfaces

The cylinder is made of a high-silicon, refined and hardened aluminum alloy. Its inner liner has a silicon carbide coating on a galvanic nickel matrix. Cross-smoothing in two diamond steps ensures machining while maintaining very tight tolerances.

Pistons and piston rings

The super-compact piston with three segments is made from a special aluminum-silicon alloy with low thermal expansion. Added tin on the sliding surfaces, a weight-reduced and reinforced construction as well as extra large heat exchange surfaces characterize the structure.

• First compression ring made of nitrided and chrome-plated steel
• Second piston ring made of special steel
• Three-piece oil scraper made of alloyed and chrome-plated special steel

Vehicle assignment

Suitable exclusively for the Aprilia RS 125, built between 2023 and 2024.

Factual usage information

This product is intended exclusively for competitions in designated venues and in accordance with the regulations of the relevant sports associations. No liability is assumed for improper use.