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MK1003860
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 Drive Sprocket and Chain Set MK1003860
Standard Drive Chain
- Includes: NICHE Front and Rear Sprocket Set with Drive Chain Kit
- Compatible with the following brands: Honda
- Compatible with the following models: CRF70, XR70R
- Replaces for the following OEM MPN's: 23800-GCF-A20,41201-GCF-670,40530-GCF-672,40530-GCF-J11,40530-KYK-911,405W3-GB2-505
- Front Sprocket Teeth: 15
- Rear Sprocket Teeth: 36
- Chain Model: 420HZ
- Chain Links: 86
- Chain Pitch: 428 (12.7mm)
NICHE DRIVE SPROCKET
What is a Drive Sprocket?
- Sprockets are rotating parts with teeth that are used in conjunction with a chain to transmit power
- In order for sprockets and chain to be compatible with each other they must both have the same thickness and pitch.
- In order for the sprockets and chain to work effectively, all of the sprockets should be on parallel shafts with their corresponding teeth on the same plane.
Parts of a Sprocket
- Number of Teeth - The total number of teeth (projections) around the whole circumference of a sprocket
- Pitch Diameter (PD) - An imaginary circle which is traced by the center of the chain pins when the sprocket rotates while meshed with a chain
- Pitch - The amount of pitch diameter in inches per tooth. Gears with a larger pitch will have bigger teeth
When to Replace?
- Check how well the chain meshes with the sprocket teeth. In a healthy chain and sprocket combo, the individual chain rollers align perfectly with the spaces between the sprocket teeth and fit down into those U-shaped grooves evenly
- Look closely at the sprocket teeth to see if they have become sharp at the tips and/or slightly curled. The teeth on a new sprocket are straight and have a flat or domed shape at the tip, If the teeth are sharp, the sprocket is worn
Drive Chain Types
Pros:
- Lightweight
- Best for racing
- No loss of power
- Little to no friction
Cons:
- Wears quickly
- Stretches faster
- No internal lubrication
Pros:
- Longer Life
- Great sealant
- Internal lubrication
Cons:
- Heavy
- Most friction
- Less horsepower
Pros:
- Low friction
- Longest lifespan
- Internal lubrication
- Increased efficiency over O-Ring
Cons:
- Heavy
- Expensive
Patrick Gilbert
Reviewed in Canada on July 25, 2024
Ok
Mike Burnett
Reviewed in the United States on May 3, 2024
Fit perfect no modifications couldn’t ask for anything more 👍
Eduardo
Reviewed in the United States on February 11, 2024
Front and rear sprocket both don’t fit what is this ? I’m about to explode
Hunter Brown
Reviewed in the United States on January 28, 2024
Good quality
Piggy PhD
Reviewed in the United States on August 18, 2023
The bolt holes were not spaced correctly so you couldn’t bolt the sprocket on. The rest of it was good.
Martin Maheux
Reviewed in Canada on December 13, 2023
Très satisfait
Tilly
Reviewed in the United States on October 1, 2023
Perfect fit and holding up to daily use on ranch on the crf70
Jennefer L. Roesler
Reviewed in the United States on July 24, 2022
Worked great and came right to my door. Cheaper than the local motorcycle dealership
Cody burgess
Reviewed in the United States on February 14, 2022
overall good product. But it does not fit xr80R front sprocket.
VMX540fan
Reviewed in the United States on March 18, 2021
Boxed nicely. Arrived with sprockets busted out of display card packages and loose inside box. Powder coat on sprocket survived intact. My XR70 has a six spline countershaft therefore the 12 spline sprocket did not fit. The rest of the kit appears to be the correct size and nicely finished despite the dunnage failing to secure the sprockets to the display cards. Installation is scheduled for Friday. Do you want another review after the parts are installed?
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