High-compression Doppler cylinder head, machined aluminium for Peugeot 103 SP - SPX - RCX - Fox and Honda Wallaroo. The volume of its combustion chamber is optimised for a 50cc racing cylinder and it comes complete with an O-ring.

Bidalot complete cast iron piston RF50WR 39.94 mm racing replica, height 22 mm, centered ring pin, chromed steel  ring 40 x 1 mm. For Derbi Euro 2/3 and G1 G2 G3 and Open engine.

Red tensionner spring - spare part for Doppler ER1 103 SP / MVL / SPX / RCX / MBK51.  Hardness medium = Yellow  Maximum hardness = Red

  Yellow tensionner spring - spare part for Doppler ER1 103 SP / MVL / SPX / RCX / MBK51.  Hardness medium = Yellow  Maximum hardness = Red

Doppler ER1 reinforced crankshaft for Peugeot 103 RCX / SPX cylcomotor. Supplied with piston needle bearing.

Set of 2 bearings: 6204 + 6203, reinforced, steel cages and 2 oil seals: 20 x 30 x 7/17 x 30 x 7 mm. For Peugeot 103 SP SPX RCX Vogue MVL ...

Bidalot complete cast iron piston RF50WR 39.95 mm racing replica, height 22 mm, centered ring pin, chromed steel  ring 40 x 1 mm. For Derbi Euro 2/3 and G1 G2 G3 and Open engine.

High compression Doppler cylinder head Peugeot 103 Fox and Wallaroo Version without decompressor: cylinder head shape optimized for efficient 50cc cylinders.

Cylinder - piston - base gasket Doppler for Peugeot 103 - Fox - Wallaroo aluminium ER1 , 50cc, air cooled Doesn't fit with a klasse (25km/h) engine cases.

Engine spring Doppler ER1 for Peugeot 103 SPX / RCX