Bidalot Cylinder RF80WR 80cc Derbi euro 2 stroke 44.9mm connecting rod 90mm

Cylinder Bidalot RF80WR 80cc s.44.9 connecting rod 90mm for Derbi Euro 2.

Cylinder modified by defining new transfer and exhaust cores, adapted to its 80cc displacement.
These cores have been studied to provide very high performance at high revs, without penalizing torque and power at mid-range.

The water channels have been improved, surrounding the charge and exhaust transfer, with constant thicknesses to ensure stability and achieve optimized cooling.

This Cylinder is designed to be equipped with the crankshaft reference 12100886 with a 44.9 mm stroke, 90 mm connecting rod.

The exhaust nozzle included in the kit with the factory Racing exhausts has 4 screws. However, it is possible to install a nozzle with 2 screws, with a distance between screws of 50 mm.

Features

• Port heights and compression ratio suitable for Racing use (±193° Exhaust, ±132° transfers, for a volumetric ratio of 15.8-16.0/1 )
• Requires the assembly of all Racing components to get the most out of it, 80/90cc exhaust pipe, intake with 28 / 32mm carburettor, Reed Valve VForce3 reed box and Bidalot WR Rotor.
• The extreme level of performance also requires excellent mechanical knowledge for adjustment and maintenance.

The kit includes

• Aluminium Cylinder with nikasil coating d=47.6mm
• Self-centering monoblock cylinder head, 2.4mm recessed in the Cylinder, with high compression combustion chamber
• 6 Transfers
• Exhaust boosters
• Combined with the 44.9 mm stroke crankshaft, the exact displacement is 79.93 cm3
• Piston Hypersilicon Racing Factory
• Set of base gaskets of different thicknesses
• New 2018 profile, elliptical, specific, to reduce operating clearances
• Chromed steel ring Ø47.6x1, domed lapped, Japanese manufacture
• Shaft Ø12x40mm
• Set of cylinder head O-rings
• 4 Cylinder studs L=122mm
• Various screws

Assembly instructions

¡Attention! The assembly of the DERBI E3 crankshaft in a DERBI E2 crankcase will require the use of an electric water pump.