Top Racing central/compression springs (set +45% / +53% +61%), Minarelli

set of three compression springs from the renowned Spanish company Top Racing. The set includes springs in three hardnesses, easily color-coded: +45% white, +53% yellow, and +61% red. The torque-adjusting spring has multiple functions. Choosing a harder spring tightens the belt between the discs, allowing it to transmit more torque without slipping. Using a weaker spring, the degree of compression is better, but there's a greater risk of belt slippage. Spring hardness also indirectly affects engine speed. The optimal solution is to purchase several springs with different hardnesses and select the appropriate one.