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NICHE Standard Bore Top End Repair Kit for Yamaha YZ85 5PA-11631-00-D0 5PA-11631-00-C0

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$27.95

$ 13 .99 $13.99

In Stock
  • Replaces OEM Part Numbers: for Yamaha 5PA-11631-00-D0, 5PA-11631-00-C0, 5PA-11631-00-B0 5PA-11631-00-A0, ES-11631-01-A0, 4ES-11631-01-B0 4ES-11631-01-D0, 4ES-11631-01-C0, 4ES-11351-00-00
  • Compatible for Yamaha 2002-2012 2016-2018 YZ85
  • High Quality Cast Aluminum Piston for Superior Quality and Performance
  • Piston Kit Complete with Piston, Rings, Needle Bearing, Wristpin and Circlips
  • Piston Diameter 44.5 / Piston Height 50.8



Product Description

NICHE Powersports Replacement Parts

MK1001155

NICHE Powersports Replacement Parts
About NICHE

NICHE provides Powersports replacement parts. Some of the NICHE product categories include cylinders, brake pads, axles, off-road mirrors, and drive chains. NICHE parts are here for when you need them the most.

NICHE Piston Gasket Kit Part Number MK1001155

  • Includes: NICHE Piston Gasket Kit
  • Compatible with the following brands: Yamaha
  • Compatible with the following models: YZ85
  • Replaces for the following OEM MPN's: 5PA-11631-00-D0, 5PA-11631-00-C0, 5PA-11631-00-B0 5PA-11631-00-A0, ES-11631-01-A0, 4ES-11631-01-B0 4ES-11631-01-D0, 4ES-11631-01-C0, 4ES-11351-00-00
  • Compatible Vehicle: ATV
  • Piston Diameter: 44.5
  • Piston Height: 50.8
  • Piston Material: Aluminum
OEM MPN's: 5PA-11631-00-D0, 5PA-11631-00-C0, 5PA-11631-00-B0 5PA-11631-00-A0, ES-11631-01-A0

NICHE PISTON

An ATV piston is a component of engines, pumps, and gas compressors. It is located in a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the crankshaft through a piston rod and or connecting rod

Piston Anatomy

A piston is a cylindrical engine component that slides back and forth in the cylinder bore by forces produced during the combustion process. The piston acts as a movable end of the combustion chamber. The stationary end of the combustion chamber is the cylinder head.

Piston Components

ATV Piston components include the piston head, piston pin bore, piston pin, skirt, ring grooves, ring lands, and piston rings. The piston head is the top surface of the piston which is subjected to tremendous forces and heat during normal engine operation

NICHE GASKET

A gasket is a mechanical seal which fills the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression.

Some Types of Gaskets:

  • Head gaskets create a seal between the engine block and cylinder head. This seal establishes a proper compression and prevents fluid leaks into the cylinders
  • Base gaskets create a seal between the top-end of your engine and the engine cases. Stop pesky engine oil leaks before they cause permanent damage to your engine.
  • The valve cover is sealed to the upper section of the engine cylinder head by a valve cover gasket. As it passes around the camshafts, rockers, and valves, the gasket stops engine oil from seeping out.

Irene
Reviewed in the United States on April 6, 2024
Worked fine working a1
Zack barker
Reviewed in the United States on April 11, 2019
Great product so far fit perfect for a 2007 yz85 and after installing it starts first kick I'm still breaking it in but seems great so far