Automotive Parts Diego Costa  

Motorcycle Suspension 101: A Quick Guide

Motorbikes are built with a suspension layout consisting of an inclination of fork and height. Modifying the parts from the suspension design of the bike can impact the configuration; hence, it is recommended that the front and rear sides of the motorcycle must be in harmony with one another. Optimal results can be obtained when the front and rear suspension system components interact together.

The Design

The motorcycle shocks are pressurized under compressed gas. The fluid is compressed, and the gas and fluid pressure are kept separate with the aid of the pump. At the top of the shocks the separator is directly connected or stored in a different reservoir.

There is another form of shock absorber used in motorcycles that matches everything in the central cylinder tube. This tube is often referred to as an internal gas tank.

Nitrogen is being used to make the fluid pressurize. This pressurization stops the cavitation of the substance, which is useful for increasing the absorption of shocks. Secondary reservoirs help to regulate the temperature of the liquid, which improves the service life of both the parts and the fluid.

Integrated temperature compensation is provided for the motorcycle shock absorbers. The fluid begins to flow more readily with the rising temperature of the fluid, but the fluid flow is regulated within the absorbers. The impact of shock absorption is therefore very independent of the temperature.

In a few new motorcycle suspension systems, an independent modification of rebounding damping and compression damping is feasible. There is also adjustable either hydraulic or mechanical pre-loading system contained in the motorcycle suspension systems.

Flow of Fluid in the Shocks

The liquid of the suspension systems is pushed through the needle valves at a steady rate. It can also be pushed into a variety of other openings in the piston. Shims control the flow of fluids. The shims are the steel washers. At increasing liquid flow pressure, the shims are deflected from their location. The characteristics of the damping action can be adjusted by adjusting the number, thickness or diameter of the shims.

As the bike shock systems are compressed by the motion of the bikes through the needle valves (integration of the return valves and the pressure valves), the fluid begins to flow via the piston path. During rapid contraction, when the piston speed is high, the needle valves are not adequate for the flow of fluid.

In this situation, the fluid continues to flow through to the shims, which are located just below the piston. The fluid is pushed into the external fluid chamber, which is passed via the piston rod. A special compressive valve is used to drive the fluid into the external fluid tank.

This valve is connected to the shims that expand during high piston speed.

Setting up shocks for motorcycles & bikes

  • Place the motorbike on the stand.
  • To hold the suspension of the bike in a fully extended position, lift the back wheel of the bike.
  • The length is calculated either from the bottom part of the back mud guard or from some point just above the back wheel axle marked with a piece of tape.
  • Different measurements are also made on the front axle. (In between bottom of the top fork crown and the front wheel axle)
  • It is expected to access load to the springs, the motorbike (With the rider). The method of calculation is repeated.
  • Take the readings in this stage, but this time the measurement is taken with the rider.