50mm spring commonly used as a rear brake master cylinder return spring. This spring is used on a variety of models, often used on 1976 to 1994 Tonti frame models when equipped with foot pegs. 850T3, 1000SP, LeMans 850, LeMans II, CX100, LeMans III, 850T4, 850T5, Mille GT, SPII, SPIII, Quota 1000, Quota ES1100, Strada, however, inconsistencies are common.
There were 2 different springs used depending on the lever, so be sure to measure.
Also used for the seat lock spring on 1100 Sport carb, 1100 Sport injected and Daytona RS