Short Description: A high-precision lock ring designed to secure the piston pin in place. This essential component ensures the structural integrity of your engine and prevents catastrophic internal damage.

Technical Specifications:

• Compatibility: Dnepr MT-11 (and compatible 649cc double-cylinder models)
• Manufacturer Code / SKU: 7201239
• Part Type: Engine / Internal Combustion Components

Purpose and Role in the Motorcycle (based on the original manual):
The Circlip of the Piston Pin is a critical safety fastener located within the engine's cylinder group. In the Dnepr MT-11's 649cc engine, the piston is linked to the connecting rod via a "floating pin." The primary function of the circlip (lock ring) is to limit the axial displacement of this pin, locking it securely within the annular recesses of the piston bosses. Because the piston moves at high speeds and is subject to intense pressure, any failure or displacement of the circlip would allow the piston pin to slide outward, leading to immediate and severe damage to the cylinder walls and the crankshaft assembly. While these parts are durable, they should be replaced whenever the engine is overhauled or the piston pin is removed to ensure maximum tension and a secure fit.

Benefits of Buying:

• Exact Technical Fit: Manufactured to meet the precise dimensions of the MT-11 piston boss recesses, ensuring a snap-fit that stays locked under high RPMs.
• Enhanced Engine Reliability: Using a fresh, high-tension circlip eliminates the risk of "fatigue failure" associated with old, reused rings.
• Prevents Catastrophic Failure: A low-cost part that provides essential insurance against the most expensive types of engine damage.