Motorcycle:Shock Absorbers(front fork)

Functions and Roles

Shock Absorbers

Shock absorbers consists of spring which determine posture and cushioning buffer action and a damper which suppresses vibration.
On 2-wheeled vehicles, shock absorbers are separated into the categories of the “front fork” and “rear cushion”.
The front fork:

  • Front fork serves as rigidity component just like a frame. Vehicle specific rigidity given to present run out while braking and changing the direction of a wheel though handle operations.
  • Maintain balance of vehicle frames stability and secures straight running stability as well as rotationality of the vehicle.
  • The front fork prevents excessive weight on the front wheel during drastic sudden applications the break, softens bumping when driving on rough road surfaces.
  • The front fork maintains proper damping through traction with the road surface.

Types of Shock Absorbers

Upright telescopic type

Free-valve type

Free-valve type

Construction is relatively simple, with stable performance. Applied widely from small scooters to large-sized cruiser types.

 
Cartridge type

Cartridge type

Constructed with high rigidity and stable damping force. Mainly applied to large-sized on-road models.

 

Inverted telescopic type

B.P.F.(Big Piston front Fork)

Big Piston Front Fork

Constructed with enlarged piston to improve the responsiveness of damping force, thus demonstrate high performance. Applied to most current large-sized on-road models.
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S.F.F.(Separate Function front Fork)

S.F.F.(Separate Function front Fork)

Constructed with pressure separation damper in one fork and spring in the other fork, this type of flont folk demonstrate high performance by deviding functions.
Applied to motocross race models. This front folk allow for both high damper performance as well as light weight construction.
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Cartridge type

Cartridge type

Demonstrates high rigidity and stable damping force through damper construction.Mainly applied to large-sized on-road models.
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Pressurized separation type

Pressurized separation type

By pressurizing the damper improved performance. Applied to motocross race model.



SHOWA's Approach

SHOWA develops its technology for stock motorcycles based upon feedback gathered from data for 2-wheeled vehicle road races and motocross races.

Thanks to recent improvements in dynamic performance, the gripping power of the tires, improvements in the efficiency of the brake system, the increased control of sudden frontal subduction when breaking, as well as increased absorbency of road surface gaps along with a compatible riding comfort, SHOWA has been able to develop its Big Piston Front Forks for road models. By striving to achieve further improvements to the rear cushion and in tire traction, we have also succeeded in installing the B.F.R. system in bikes for road racing as we aim for mass production.
With the large diameter front forks used in off-road models, and with regard to the weight trends of highly rigidity, we have been able to achieve significant weight reductions in our S.F.F. construction designed to enter the mass market. Through feedback from stock models utilizing performance and functional improvements cultivated from the limits of racing, SHOWA aims to provide shock absorbs that have achieved:

  • A high level of driving safety
  • Exceptional riding comfort
  • Weight reductions

Furthermore, in light of our anticipations for increased future sales expansion in the Asian market, and in order to be able to provide ever more attractive products for our users, we are opening a new R&D facility in Thailand that is to serve as our Asian base. We feel that have been able to prepare an extremely timely development system.