Clutch Springs DRT for clutch
DRT 393/PK 50 XL FL, for Vespa
stiffness: L, green, 6 pcs,
l 23 mm, Ø 12,5 mm
In order to transmit more performance, an increased friction is necessary within the clutch mechanism. Reinforced springs lead to more cohesive pressure, more plates to an increased frictional area. All friction plates can be combined with all reinforced spring types, according to motor and state of tune.
The DRT springs have been developed for use in small frame motor clutches that can be fitted with 8 or even 12 clutch springs. The various spring grades ensure reliable clutch operation for every state of tune.
The following combinations have proved reliable:
Standard Motor: 8x green
Road Tuning: 10x green
Sport-Tuning 20-25 PS: 12x green
Race- Tuning: 25-30 PS: 8x green, 4x blue
Race- Tuning: 30-35 PS: 6x blue, 6x red
SIP-TIP: Order varying clutch plate sizes for combinational experiments. For set-ups using more than 5 clutch plates use also the DRT clutch basket and the strengthened DRT clutch cluster circlip.
OEM Numbers (for the purpose of comparison)
HPmol k393.CITY/06pz (13022) (DRT)