Chain/clutch assembly (clutch disc/clutch kit) for STIHL chainsaws of the MS660, MS650 and 066 series--BIEMMEDUE

Special clutch kit for STIHL chainsaws of the MS660, MS650 and 066 series (clutch disc/clutch kit) – Product description: Is your large-displacement STIHL chainsaw losing cutting performance, idling roughly, vibrating when starting, or making unusual noises? This is likely due to a worn clutch or age-related springs. This high-quality clutch kit was specially developed for large-displacement chainsaws such as the STIHL 066, MS660, and MS650 and restores your machine's full cutting performance. Clutch operating principle: The chainsaw clutch is an automatic centrifugal clutch. If the engine speed drops below idle speed, the spring pulls the centrifugal block back, disengaging the clutch and stopping the chain. At full throttle and increasing engine speed, the centrifugal block overcomes the spring tension and is pushed outwards. It engages firmly with the clutch disc and drives the chain again. Key Features: Precise Fit: The inner diameter of the clutch disc and the outer diameter of the centrifugal block precisely match the specifications of the original equipment, ensuring precise engagement clearance. Excessive clearance leads to harsh impacts and rapid wear; insufficient clearance allows the chain to rotate freely in neutral. This product offers precise clearance, combining durability and safety. High-Temperature Resistant Springs: Made of high-quality spring steel and subjected to a special heat treatment, the springs retain their elasticity even during prolonged expansion and contraction cycles at high temperatures and speeds. They are fatigue and deformation resistant, ensuring smooth disengagement in neutral and reliable engagement at high speeds. Reinforced Riveting: The friction material of the centrifugal block is attached to the base with high-strength rivets. Compared to bonding, this method offers superior impact and heat resistance and prevents the friction discs from detaching at high speeds. Specifications: Part name: Clutch assembly / Clutch disc / Clutch block kit Compatible models: STIHL 066, STIHL MS660, STIHL MS650, STIHL MS640, STIHL 064 (some versions), STIHL 084