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MK1003425
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 and Gasket Kit MK1003425
- Includes: NICHE Piston Gasket Kit
- Compatible with the following brands: Polaris
- Compatible with the following models: Big Boss, Trail Blazer, Trail Boss, Xplorer
- Replaces for the following OEM MPN's: 3086757, 3084292, 3084016, 3084015, 3083769, 3083942, 3083617, 3087049
- Compatible Vehicle: ATV
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.
Axel Carlson
Reviewed in the United States on September 13, 2024
Price
Fernando rodriguez
Reviewed in the United States on August 18, 2024
I installed let it break in for a few hr after I hit it to maximum speed and limit and so far
glen e
Reviewed in Canada on May 8, 2024
Never did a motor rebuild on a 250 polaris...went on you-tube show me how to do it ....took it all apart..put the new parts in ..started right up ...purrs like a kitten..
Jason
Reviewed in Canada on May 3, 2024
Circlips are a little weak. I reused my originals. All else is great
Prissy M.
Reviewed in the United States on March 20, 2024
Works great
Cows with hats
Reviewed in the United States on October 11, 2024
Doesn't fit 98 Polaris Xplorer 300 as the vehicle filter stated that it would. The bore size is not listed as it states it is standard. My bore was 74.47 mm and the piston was too small, but I didn't measure the piston to get the exact size. Seller, Please update the description to list the actual bore size and update the vehicle fitment. Thank you.
Pol1968
Reviewed in the United States on May 14, 2023
Seems to be a quality product but it also needs to have the cylinder head included
Orchard6
Reviewed in the United States on August 13, 2022
Everything fit well and seemed well constructed. It solved my no starting issue that I had due to low compression. After 10 hours of run time it still starts and runs great!
17x
Reviewed in Canada on November 18, 2022
End clips are different but work well
Rodney Workman
Reviewed in the United States on June 19, 2021
What an amazing company to work with, Recived my product and noticed the gasket seals where broken reached out to the company and with in less then 24 hours they had new ones in shipping!!! Ill definitely continue my business with the company, All in all its exactly what I needed for my quad.
Daniel Musser
Reviewed in the United States on May 4, 2021
excellent quality! in my case, we could not use the kit since the engine on our bike had apparently been modified such that the kit could not work for us... but the quality of the parts was excellent, mic'd out as precisely machined as well. sad we were not able to use it. on another note, the seller was excellent to work with - both buying and returning.
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