Knowledge Base — Sue Industrial Co., Ltd.

Q&A

What is a Brake System?

Fundamental knowledge about wheel braking systems and how brake pads work

Why Are Brake Systems So Important?

Brakes are the component responsible for slowing or stopping a vehicle — whether a car or motorcycle — according to the rider's will. The braking system is what controls the vehicle's speed, making "the brake system" the critical factor in safe riding control.

There are generally two types of brake systems: Drum Brakes and Disc Brakes.

Drum Brake System — The Foundation of Motorcycle Braking

In a drum brake system, a cam pushes the brake shoes outward to make contact with and create friction against the inside of the wheel hub. The first brake shoe operates as the Leading Shoe — it makes contact first. The second shoe operates as the Trailing Shoe — it engages afterward, and provides less braking force than the first.

This operating principle tells us that the greater the contact surface area of the brake shoe, the shorter the braking distance and stopping speed will be.

This insight led YASAKI to develop its brake shoe design and contact surface geometry to an optimal point. "Every YASAKI brake shoe — across all models and grades — has a contact surface of no less than 85%. This means more confident stopping with less effort required on the brake."

Drum Brake System — The Foundation of Motorcycle Braking

Going back over 20 years, the market at the time favored Japanese products — "Made in Japan" was required to sell well. My father had a somewhat playful idea. Back then, Yamaha, Honda, and Kawasaki motorcycles were very popular. He combined them together and came up with the word "YASAKI." But in reality, it is a 100% Thai brand, fully registered as a trademark in Thailand.

YASAKI Products Currently on the Market

Our main market focus is brake shoes and disc brake pads. We also offer other motorcycle spare parts — front/rear wheel hubs, brake levers, clutch levers, mirror brackets, valve covers, clutch shoe bowls, etc. We also carry disc brakes for pickup trucks and passenger vehicles, though those haven't been heavily promoted yet. All of our products carry the YASAKI brand. We still also perform contract aluminum die-casting work to order.

OEM STANDARD

YASAKI — The Leader in OEM-Standard Parts

Consumer demands today are constantly shifting due to changing buyer behavior and the growing number of competitors in the market. In the past, parts were mostly used in their standard form from general-standard manufacturers. Today, parts such as wheel hubs and sprocket hubs are being machined to a polished finish, or wheels are being made from aluminum — all of which relate directly to safety. YASAKI products are manufactured as "standard parts", with every production step carefully supervised and inspected to provide maximum confidence to consumers, along with the widest model coverage available. You can be confident in the quality of YASAKI parts — "OEM-grade quality".

We are committed to developing comprehensive services — covering production, delivery, sales systems, and after-sales service that are fast and high-quality, with the widest possible coverage of motorcycle models.

Raw Materials — We use the highest-quality materials, the same grade chosen by motorcycle manufacturers.
Production — We use modern machinery such as DIECASTING machines and CNC machines, ensuring uniform quality and high precision in every part.
Packaging — High-quality packaging materials preserve the product from environmental conditions and effectively prevent damage during transit.
Delivery — A delivery system ready to serve customers quickly.
Distribution — Exported to more than 10 countries worldwide.

COMMON PROBLEMS

Common Problems & Solutions

A collection of real-world usage problems, complete with causes and impacts you should know.

Problems Related to Wheel Hubs

Wheel hubs are motorcycle components no less important than any other part. They are responsible for bearing the vehicle's weight and are directly related to the braking system, so they must be strong, durable, and resistant to deformation. YASAKI places great importance on close inspection at every stage of production. Hub problems can arise from non-standard manufacturing, poor-quality raw materials, or misaligned hub centers.

Common hub problems fall into two categories: assembly mechanic issues and end-user issues.

Mechanic / Assembly Issues

Spoke holes not aligned — difficult to lace the wheel
Bearing housing cracks or is difficult to insert bearing
Left-right center misalignment — hub wobbles
Spoke holes tear
Disc rotor loose or wobbly after installation
Rotor mounting screws are difficult to thread in

End-User Issues

Spoke holes crack after hitting a pothole
Hub color changes after short use
Wheel bearing fails; after replacement the new bearing is loose

These problems recur when substandard parts are used. YASAKI has recognized the importance of these issues and controls every production step — using the same material grade as motorcycle manufacturers, forming with modern die-casting machines for consistent shape, CNC-turning for minimal deviation and high center precision, and using standard paint that won't peel or discolor under heat.

You can trust the quality under the YASAKI brand — The Leader in OEM-Standard Parts. Quality Guaranteed.

Common Wheel Hub (WHEEL HUB) Problems

Problem	Cause	Impact on Repair Shop
1. Bearing housing cracks easily after bearing installation 2. Bearing becomes loose or wobbly after installation	— Bearing housing diameter is non-standard (too small) — Inexperienced bearing installation technique — Bearing housing diameter is non-standard (too large)	— Lost time and increased labor costs — Customers perceive the shop as having substandard workmanship
Spoke flange cracks or breaks when tensioning spokes — even with normal technique	— Non-standard raw material (aluminum alloy) used — Porous casting — too many air pockets in the part	— Customers perceive the shop as lacking quality standards
After assembly and lacing, test spin reveals hub vibrates and wobbles significantly	— Left and right bearing hole centers are not aligned	— Customers perceive the product as substandard
Hub color changes from bronze to yellow after short use	— Manufacturer used low-quality, heat-resistant paint	— Product quality degrades quickly

Common Brake Shoe / Disc Brake Pad Problems

Problem	Cause	Impact
Noise during braking — whether braking hard or lightly	— Brake pad compound composition — Brake shoe position is misaligned — Hub surface is rough or worn — Hub center position is off	— Non-standard installation can also cause noise
Brakes don't grip — feel slippery, or pressing the brake feels like pressing a spring New brake pads fitted but slippery again after short use	— Insufficient contact surface area — Ineffective brake pad compound — Not heat-resistant	— Longer braking distance required
Brakes work fine when dry but slip when wet	— Low-quality brake pad compound	— Does not cover real-world usage conditions
Brake pads deeply groove the drum/disc surface	— Non-uniform brake pad compound mixture — Use of low-quality raw materials	— Hub and disc wear out quickly

YASAKI is fully aware of these problems, which affect both assembly mechanics and end users — causing wasted time, unexpected expenses, and early part replacement. YASAKI has therefore developed products that can meet every need and handle every riding condition.