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MK1001176
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 Cylinder Piston Gasket Kit Part Number MK1001176
- Includes: NICHE Cylinder Piston Gasket Kit
- Compatible with the following brands: Honda
- Compatible with the following models: Rancher 420
- Replaces for the following OEM MPN's: 12100-HP7-A00, 12191-HP5-601,12251-HP7-A01
- Compatible Vehicle: ATV
- Placement on Vehicle: Front
NICHE CYLINDER
- ATV engines come with either one or two cylinders
- Displacements typically measuring between 100cc and 800cc
- It's important to note that safely riding an ATV requires a certain amount of body weight and physical strength
- Disaster can strike, for example, when a young rider uses an overpowered or a larger 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.
Serena Dougherty
2025-08-27 17:18:27
Components are well made.Looks almost identical to the OEM I took of.Replaced the old one that was smoking more than Snoop Dog on April 20th.The biggest help was one guys YouTube video.Really wish I would’ve gotten a ring compressor, it was way harder than they advertised to put the piston in.
Mitch Shoemake
2025-08-19 14:23:37
Fast shipping. 4 whelller running like new.
Randell
2025-08-11 16:50:52
Everything was good quality and fit correctly
Harry
2025-07-18 18:24:02
Didn’t even last 3 months of weekly use. Started smoking again
Ashleigh Gilley
2025-07-17 21:58:02
It’s not oem, but works fine. Everything needed to replace a top end.
Scott Goff
2025-05-02 16:49:15
The clipFor the piston wrong size. Everything else was good
Tbone
2025-03-28 09:42:48
Worked good
LeLe
2025-02-26 18:41:34
Worked perfectly for the rebuild that I did on our atv. The ease of use for the rebuild with this kid was wonderful. I saved tons of money by buying the kit myself and repairing and this kit made it easy to do, without having to take it to a mechanic shop!
jason lyall
2025-02-21 10:27:56
The gaskets and cylinder looked great. I opted to use an OE piston and rings though instead of the supplied piston. Personal preference. Time will tell if they hold up well.
Dustin
2025-02-12 14:27:40
The kit comes compete, everything worked well except for the head gasket. Double check when installing. New head gasket covered cooling ports.
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