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519-KPS2217T
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 Part Number 519-KPS2217T
- Includes: NICHE Piston Kit
- Compatible with the following brands: Polaris
- Compatible with the following models: Cyclone 250x, Scrambler 250, Trail Boss 250R
- Replaces for the following OEM MPN's: 3083942, 3083546, 3083512, 3083839, 3083626
- Compatible Vehicle: ATV
- Bore Size: 72mm
- Material: Aluminum Alloy
- Piston Type: Dome
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
Moosemangler
Reviewed in Canada on September 29, 2024
Worked great for my 1990 polaris 250 trail boss 2x4
Axel Carlson
Reviewed in the United States on September 13, 2024
Price
Luaxana Griffith
Reviewed in the United States on August 18, 2024
It works but how long will it last???This got my atv started it’s kinda loud makes a ping noises sometimes idk if it’s my mix or poor quality bearing only time will tell I’m not taking it apart until it dies again.I ordered a 2nd to have on handPiston DONE Aug 29 so abt a month it lasted.it had problems since the start sound like piston slap with same brand sleeve I didn’t replace that it was already done when I bought it so these only pistons only have a short14hr lifespan when I researched this productguess it’s time for another brand complete top end
Laura
Reviewed in the United States on May 8, 2024
You can almost certainly tell who knows what they’re doing, and who doesn’t by the reviews left for this product. I’ve purchased this companies pistons on many other occasions, for Rotax two stroke engines to four stroke equipment/machinery engines. The quality is easily OE, possibly better in some instances . This company is actually an OE for many different engine companies. A little bit of research would’ve told people that. Since you can’t post your skill level when submitting a review for particular product, you can only help but to think that a lot of the negative reviews were of course user error or installer error. It happens more than anyone whatever care to admit, but this is a good product. I’ve had no issues with the piston. It’s had strong compression on a moldy ported jug. There is nothing wrong with the quality, the specs are identical within .0001 inch to a new standard bore uncoated Polaris piston. The rings have the perfect amount of attention. They’re not brittle or weak as some have mentioned, use the right tool to expand the rings, not you meat puppet fingers, they’re top side stamped, chrome faced standard rings. Will continue to purchase this companies pistons and rings for my powersports and ag machines when the need arises.
yannick bilodeau
Reviewed in Canada on May 27, 2024
Fit perfectly in my 91 trail boss 250
pablo castaneda
Reviewed in the United States on May 24, 2024
Broke it in for 5 hours and started being rough on it after 5 1/2 hours it has 14 hours on it and I’ve been rough on it since the 5 hour mark still running great really good oem product
Jonathan De Jager
Reviewed in the United States on December 29, 2024
Works great!!! Got 20 hours on the rebuild and going strong!!!
Natalie siewert
Reviewed in the United States on October 23, 2024
Item fit well. We will see how long it lasts.
David Epperson
Reviewed in the United States on October 22, 2023
This is my second time using the Piston and rings for a completely different Polaris trailblazer and I have to say that the first one is still running with out any problems.once again,set the proper ring gap and polish the sharp points of the Piston and I don't think you could have any problems with this product at all.
Ken Butt
Reviewed in Canada on December 28, 2022
as described arrived ahead of schedule , some damage in shipping , but sent new parts quickly. Used on 1985 Polaris star 250
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