The main value for a chain selection is the dimension (428,520,525…). It is necessary to keep the chain size according to the motorcycle producer instruction.
The next important step is the type of chain (ORM, ORH, SDZ). Differences between the chains are in the following details: breaking load, sealing ring type or side plates shape. In general, for motocross are used non O-ring chains because of lower power loses, this is possible for using lower displacement around 125ccm. O-ring chains are very popular because of their price. They can be used for most of motorcycles, which are not very fast. For the strongest motorcycles (especially road motorcycles or travel motorcycles) are used X-ring chains, where is supposed higher speed and longer chain durability.
The following table shows approximately the motorcycle application of certain ČZ chain types. Each type of chain is described in details in section Products, article Motorcycle chains.