Here is the latest high engine of the French house BIDALOT, the RF50WR, in adaptable version, for 50cc motorcycle with gearbox with MINARELLI AM6 engine.
Adaptable means that this high engine can be substituted directly for the original model. Unlike the Racing version, it does not require a special crankshaft, and is designed to be fitted with a racing crankshaft and connecting rod length identical to the original.
On the other hand, its distribution heights (diagrams), and the compression ratio, have been reduced, compared to the Racing version. Thus, it will be less sensitive to the various settings, and especially to the peripherals used. More clearly, it will support a little older gasoline, valves not necessarily ultra adapted to precision, a more standard exhaust, an ignition not necessarily variable... The engine will have more torque, and will be less loud than an engine of competition! Which is much more pleasant to ride every day.
For ALLDAYS use, we highly recommend this adaptable model! Entirely modeled in 3D CAD, the cylinder sees its water chamber go around all the transfer and exhaust cores, with constant thicknesses, able to guarantee great dimensional stability of the cylinder, due to optimized cooling.
The cylinder head, heat-treated, is also equipped with a water chamber, surrounding the combustion chamber, for good heat dissipation and perfect cooling. It is self centered in the cylinder, and fits 1.1mm into the bore on this version.
The fixing of the specific exhaust flange is ensured by 4 screws.
You will find in accessories, exhaust flanges of different sizes, allowing the adaptation of almost all the pots of the market. These flanges are available in the following dimensions:
Ø28mm x L30mm
Ø30mm x L30mm
Ø32mm x L30mm
Do not forget to order the flange with the diameter adapted to your muffler at the same time as the cylinder!
Technically, this thermal group is composed of:
High engine RF50WR Adaptable MINARELLI AM
Aluminum cylinder, with heat treatment, nikasil coating Ø40mm
Aluminum cylinder head, with heat treatment, self-centering and re-entering 1.1mm in the cylinder, with high compression combustion chamber
5 transfers
Booster Exhaust
RF50WR hypersilicon piston Ø40mm
New Profile 2018, elliptical, specific, to reduce operating clearances
28mm axle height
Segment Chromed steel Ø40x1, domed lapped, made in Japan
Shaft Ø12x33mm
Set of base gaskets of different thicknesses
Set of cylinder head O-rings
4 cylinder studs
Miscellaneous screws
Mounts on 50cc motorcycles with gearbox equipped with the minarelli am3, am4, am5, am6 euro 1, am6 euro 2 engine :
APRILIA RS 50cc am6 engine from 1997 to 2006 (warning news after 2006 in derbi euro 3 engine)
APRILIA RX am6 engine (warning news after 2006 in derbi euro 3 engine)
APRILIA MX am6 engine (warning news after 2006 in derbi euro 3 engine)
APRILIA TUONO 50cc am6 engine from 1997 to 2006 (warning news after 2006 in derbi euro 3 engine)
BETA RR
BETA RR ALU
BETA CRE
HONDA HM
HONDA CRE
HONDA BAJA
HUSQUVARNA WXE
HUSQUVARNA CH
HM DERAPAGE
HM CRE
MALAGUTI DRAKON
MALAGUTI XTM
MALAGUTI XSM
FANTIC CABALLERO
PEUGEOT XP6
PEUGEOT XPS
MOTORHISPANIA RYZ
PEUGEOT XPS
PEUGEOT XP STREET
PEUGEOT XP STREET EVO
PEUGEOT XR6
MOTORHISPANIA RX
PEUGEOT XR7
MOTORHISPANIA RX-R
RIAJU RS1
RIEJU RS2
RIEJU RS2 MATRIX
RIEJU RS2 MATRIX PRO
RIEJU SMX
RIEJU MRX
RIEJU SPIKE
KEEWAY TX EN
YAMAHA DT
MBK X-LIMIT
YAMAHA TZR
MBK X-POWER
SHERCO SM
SHERCO ENDURO
SHERCO HRD
SHERCO ENDURO
And many other machines!
