Variation rollers

[lennie86]

Is 10g rollers the best weight for GY6 50cc?

[dexameth]

10g is normally extremely too heavy, and only really used in race engines.

A stock 50cc 4 stroke should be 5-7g with the roller weights, and the exact weight is determined by rider weight, rider style, vehicle weight, and so on. It's best to get a couple sets to do some testing and find out what's best for you.