75 cc Polini cylinder - sporty classic for V50 and PK50
The 75 cc Polini is similar to the D.R., a very good-natured and powerful cylinder. The workmanship is at a good level typical of Polini and promises a long service life. It is characterized by a somewhat sportier layout than is the case with the normal DR 75. Despite this sportiness, you don't have to compromise on durability.
Due to the higher compression ratio of 11.2:1, the Polini should be operated with premium petrol. As with the D.R., a 70-74 main jet and a W4CC are recommended with original add-on parts.