【YAMAHA OEM Motorcycle parts】Brakesi YUKI TUTTO 3GW-W253A-00 Review
Fits: YAMAHA SR400, YAMAHA SR400, YAMAHA SR400, YAMAHA SR400, YAMAHA SR400, YAMAHA SR400, YAMAHA SR400, YAMAHA SR400, YAMAHA YZ490A
Drum brake is still very practical.
My SR400 is a '96 model, so it has front and rear drum brakes. This time, I replaced the rear brake because it had been neglected for about 5 years due to infrequent use (laugh).
In the case of automobiles, it is common to use a drum brake only on the rear wheel, but the front and rear drum brakes are quite old-fashioned, aren't they?
I know it's a selfish image, but I have the impression that drum brakes don't work very well..............do you think?
What kind of structure is a drum brake?
[Drum brake]
The drum brake generates frictional force when the brake lining is pressed against the inside of the drum, and the kinetic energy is converted into thermal energy by the frictional force. 。 The rotating force of the drum works in a direction that helps to spread the shoe, and the drum brake, which exerts a larger force on the lining, exerts stronger braking force than the disc brake. This action of the drum brake to pull in the shoe is called Self servo. He says.
[Merit and Demerit of Drum brake
■Merit■
Low cost due to simple structure.
Demerit ▲Demerit ▲Demerit
‥
(1) Since braking is performed by causing friction inside a sealed cylinder called a drum, frictional heat tends to accumulate inside the drum. 。 If the temperature inside the Drum rises, the so-called "Hot Dare." and is not suitable for driving with heavy use of Brake.
(2) It is also vulnerable to humidity. Moisture tends to accumulate inside due to the relationship between outside air temperature and internal frictional heat. "Squeak." And sometimes it makes a sound.
(iii) Poor Control.
Drum brake tends to have a two-shape curve in performance and poor controllability, so be careful when decelerating before entering the corner.
And the central component that makes up the Drum brake is the [Brake Shoe
[Brake Shoe replacement guideline].
‥
The thickness of the friction material part of a new Brake Shoe is about 5mm (4mm for SR), and if it is less than 1mm, it needs to be replaced as soon as possible. 。 The thickness of the Brake Shoe must be disassembled and measured depending on the car model. 。 Mileage is generally considered to be between 50,000 and 100,000 kilometers.
We need to exchange?
‥
If the brake lining is worn away, the gold part of the brake shoe will come into direct contact with the brake drum, causing damage to the brake drum. 。 Under these conditions, Brake becomes unstable and very dangerous.
Surprisingly, it works better than DISC... (laughs)
However, the following conditions apply.
No Garbage or Brake dust buildup inside the ◆.
◆Shoe thick enough.
◆No moisture has entered the system.
→ A properly maintained drum brake means it works well.
We will exchange with that in mind!
Procedure SR400Rear brake
(1) Stand the center stand and raise the rear wheel.
If you don't have it, work with Jack-up.
(2) Remove the Silencer.
(3) Remove the Tandem Footpeg.
(4) Nut of Axle Shaft (22mm) to loosen,
Remove the butterfly screw here 。
Step on ?Brake and pull out the ROD.
?Remove the Nut of the Torque rod.
Pull out the ASKULShaft (?). stick the Driver in the hole of the shaft and pull it out, then tap it out from the other side with a plastic hammer.
Place the Wheel on a soft surface such as Matte to prevent it from being scratched.
Remove the Brake Panel (lid).
?Brake & Parts cleaner is sprayed to clean the inside beautifully!
(11) Install the Spring into the new Brake Shoe.
After assembling, complete the assembly in the order of ?→?.
【Impressions】
But if you grip or step on it as if it were a disc brake, the →tire will lock up and start slipping, which could be dangerous (laughs).
I thought it would be better to Brake gently.