Complex sentence: He drew the design for the Chopper on an envelope as he travelled home from the USA, in 1967, inspired to replicate the design of Peter Fonda's charcater's motorbike in the film "Easy Rider".
Split into simpler sentences: He drew the design for the Chopper on an envelope as he travelled home from the USA, in 1967. Initially inspired to replicate the design of Peter Fonda's charcater's motorbike in the film "Easy Rider".