G+Note Belt Drive Aluminum sprocket kit for Monkey125 (5-Speed：JB03/JB05)

G+Note Belt Drive Aluminum Sprocket Kit for Monkey 125 (5-Speed: JB03/JB05)
Applicable model years: JB03, JB05
Belt: GATES brand
(Shipping included/tax excluded)

The G+Note Belt Drive Kit for Monkey 125 is an extremely rare yet rational custom package that replaces your bike's "chain" with a "belt" in the drivetrain. It offers mechanical beauty and an overwhelmingly "silky" riding experience.

Three Advantages That Change Drivetrain Norms

1. Amazingly "Quiet and Smooth" Acceleration
The characteristic "clinking" metallic sound of a chain and the jerkiness during acceleration and deceleration disappear. The unique elasticity of the belt drive gently transmits the engine's pulse to the tires, transforming the riding feel into a refined and silky experience, much like riding a high-end electric motorcycle.

2. The Freedom of "Maintenance-Free"
You are freed from the "regular cleaning" and "lubrication" that are essential for chains.

No more dirty hands: Since no oil is used, the area around the rear wheel won't get dirty with splattered grease.
No adjustment needed: Since the belt hardly stretches like a metal chain, frequent tension adjustments are unnecessary. The belt is a high-performance GATES brand, used in Harley-Davidson motorcycles, among others.

3. The "Pulley" as an Art Form
The large, machined aluminum pulley (gear) is a precise work of art in itself. Especially when the sprocket cover is removed, the sight of the belt rotating smoothly is the ultimate expression of **"functional beauty"** thatメカ enthusiasts will adore. It adds a modern and clean accent to the Monkey's retro appearance.
It is lighter compared to chain sets with equivalent strength. The adoption of an aluminum sprocket further reduces weight.

*Regarding belt tension adjustment
Initial adjustment is crucial for belt drives. Slack can lead to breakage or shorten the belt's lifespan.
Tension gauge
Measured by the "deflection amount" when a load of approximately 4.5kg (10 pounds) is applied.
目安deflection range: 8mm to 14mm

"Simple Measurement with a Finger" Without a Tension Gauge
While it's difficult to apply an exact 4.5kg load, you can judge by the feeling when pressing firmly with the pad of your finger.

Measurement目安:
Press down firmly on the middle of the upper and lower belt spans with your thumb. Typically, there should be a deflection where "the first joint of your thumb sinks slightly (approx. 10mm to 15mm)."

Signs of "Too Tight":
If it barely moves when you press it with your finger, or if it's so hard that your finger hurts, it's too tight. This can damage bearings and cause a "humming" noise during riding.

Signs of "Too Loose":
If the belt lifts off the pulley teeth with a light press, or if it undulates, it will "skip teeth" during acceleration/deceleration and damage the belt.

The secret to prolonging belt life is to adjust it so it's not excessively tight at the "tightest point."

Regarding the belt
We use durable GATES brand belts.
If not set up correctly, or depending on road conditions or external pressure, premature damage may occur.
If any abnormalities (cracks, damage, or defects) are observed before installation, please contact us without installing it for replacement. Once installed, it is considered inspected and approved, and will be out of warranty for any reason.
Also, performance is not guaranteed indefinitely. If wear, damage, or abnormalities are observed on the belt, please promptly replace it with a new belt.
By purchasing, you agree to the above terms and conditions as the basis of the transaction.

The maintenance method for Harley-Davidson belt drives is essentially the same, so please refer to it.
Drive belt maintenance method