103 SPX / RCX JAUNE (CARTER MALOSSI / POLINI) (ref: 532385)
DOPPLER is one of the few equipment manufacturers to offer this type of product.
Just like in the golden age of moped racing, the central engine spring is an essential option for the variator and clutch pulley.
It allows the variator’s responsiveness to be adapted to the engine speed.
It also provides the ability to adjust the spring stiffness and prevent slippage. The engine spring is mounted on a nylon ball joint.
No adjustments, delivered with manual
RED SPRING HARD 501442 + 20% COMPARED TO YELLOW.
YELLOW SPRING MEDIUM 501443
SPRING BALNC SOFT 503210 -20% COMPARED TO YELLOW.
BALL JOINT NUT 509336
