Short Description: Restore your engine's peak compression and power with these precision-machined P2 oversize pistons. Engineered for reliability and durability, they are the ideal choice for restoring the performance of a worn-out MT-11 engine.

Technical Specifications:

• Compatibility: Dnepr MT-11 / KM3-8.155 (and compatible models)
• Manufacturer Code / SKU: KM3-8.15501237-P2
• Part Type: Engine / Crank Gear

Purpose and Role in the Motorcycle (based on the original manual):
The piston is a critical component of the engine's crank gear, acting as the primary moving boundary of the combustion chamber. Its role is to compress the air-fuel mixture and transmit the explosive force of combustion to the connecting rod and crankshaft. This specific P2 model is an oversize piston (78.48 mm), designed for engines where the cylinder has been bored to accommodate wear.

The piston features a sophisticated design consisting of a crown, skirt, and bosses, including four ring grooves: two upper grooves for compression rings to ensure airtightness and two lower grooves for oil scraper rings to prevent oil from entering the combustion chamber. A key technical highlight is the 1.5 mm offset of the piston pin hole from the longitudinal center, which reduces mechanical impact and "slap" at the upper dead center, ensuring the engine runs smoother and quieter. Signs that these pistons require replacement include excessive oil consumption (exceeding 0.25 l per 100 km) or a significant loss in engine compression.

Benefits of Buying:

• Precision Oversize Fit: Specifically machined to 78.48 mm (P2), allowing you to revive a worn cylinder without needing to replace the entire cylinder block.
• Reduced Mechanical Stress: The integrated 1.5 mm pin offset minimizes piston-wall impact, reducing vibration and extending the overall life of the engine.
• Enhanced Engine Seal: Designed for a perfect match with standard MT-11 ring sets, ensuring maximum compression and optimal fuel efficiency.