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MK1002958
About NICHE
NICHE specializes in the highest quality Powersports replacement parts. Our parts meet or exceed the quality of the original parts that come with your machine. Some of the NICHE product categories include cylinders, brake pads, axles, off-road mirrors, and drive chains. Let NICHE components fix your machine today!
NICHE Cylinder Head Valve Spring Kit Part Number MK1002958
- Includes: Rocker Arm, Shaft, Engine Intake/Exhaust Valves, Spring, Seat, Stem Seal, Cotter, Washer, O-Ring
- Compatible with the following brand: Yamaha
- Compatible with the following models: Bear Tracker YFM250B, YFM250X,YFM250B; Bruin YFM250B; Moto 4 YFM200,YFM200DX; Pro Hauler 1000 YFU1W; Riva XC180, XC180D; Timberwolf YFB250, YFB250FW; Tri Moto YTM200,YTM225DR
- Replaces for the following OEM MPN's: 4G0-12113-01, 4G0-12114-01, 4G0-12117-00, 4G0-12116-01, 4G0-12118-00, 5H0-12119-00, 4G0-12119-00
NICHE ENGINE SPRING
A engine valve spring is located around the stems of both the intake and exhaust valves. Its primary job is to regulate the air pressure passing through the valvetrain by opening and closing the vails as needed. This prevents both valve float and valve bounce from occurring, which keeps your engine running smoothly.
When to replace?
- Loud Valve Noise
- Compression Loss
- Engine Misfire
- Uneven Rough Idle
NICHE ENGINE VALVE SPRING SEAT
A engine valve spring seat is the spot that both the intake and exhaust valves rest within the engine. Its main job is to ensure that passage of air through the valvetrain is air tight. This ensures that enough energy is provided to the pistons for conversion in order to drive your vehicles wheels.
When to replace?
- If chipped, worn, damaged, or pitted.
- If it has already been recut for fit in the past.
- Excessive smoke from lack of air management.
Michelle
Reviewed in the United States on February 5, 2021
Pancake arrived super fast and was exactly as described.
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