Bidalot  needle bearing crankshaft / piston : 12 x 16 x 16 mm -  clearance  0-2

Exhaust gasket for RF-WR Bidalot all models 

R4R cylinder + separable head kit - cast iron - 70cc for any engine DERBI Euro 3 (D50BO) on Aprilia RS (from 2006) and Derbi GPR - Senda DRD Xtreme Pro R (from 2004).

Bidalot DERBI RF50 WR Naked Cylinder 50cc EURO 3. Only the separate cylinder.

Piston kit - 47mm diameter for 70cc R4R cylinder kit for gear box mopeds equipped with the Derbi Euro 2 or 3 engine. Supplied with piston rings, pin and circlips.

RF50WR Bidalot Derbi euro 3 50cc Racing Mounts only with a specific crankshaft Stroke 39.7mm, connecting rod 85mm * Distribution heights and compression rates suitable for use Racing (± 195 ° Exhaust, ± 133 ° in transfers, for a volumetric ratio from...

Bidalot RF80WR 80cc top end engine - diameter 47.6 mm stroke 44.9mm for Derbi Euro 3. Thanks to its new design, the cooling of the cylinder is maximised via its water chamber surrounding all intake and exhaust poorts. Its one-piece cast cylinder head is self-centering in the cylinder. Its plug penetrates 2.4mm into the cylinder barrel. As with the cylinder, the cooling of the...

Top engine Racing kit 50cc Malossi MHR Team for Derbi Euro 3 engine   - Special alloy piston with a very high percentage of silicon to guarantee a very high resistance to heat and stability when temperatures change. - pewter outer coating ensuring a very low coefficient of...

RF50WR Bidalot Derbi euro 3 50cc alldays model We advise a reinforced crankshaft (genuine stroke and conrod length)