Here is our latest high engine, RF70WR, for DERBI E3 engine (D50B0).
This high engine is designed to be fitted with a racing crankshaft and connecting rod length identical to the original. However, due to its very high performance, we recommend fitting our Racing Factory crankshaft.
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-centering in the cylinder, and fits 2.4mm into the bore on this version.
The fixing of the specific exhaust flange is ensured by 4 screws. However, it is possible to mount a fixing flange with 2 holes, with a center distance of 48mm.
You will find, sold as accessories, exhaust flanges of different sizes, allowing the adaptation of almost all exhausts on the market. These flanges are available in the following dimensions:
Ø28mm x L30mm
Ø30mm x L30mm
Ø32mm x L30mm
Technically, this thermal group is composed of:
High engine RF70WR Adaptable DERBI E3:
Cylinder Aluminum, with heat treatment, nikasil coating Ø 47.6mm
Aluminum cylinder head, with heat treatment, self-centering and re-entering 2.4mm in the cylinder, with high compression combustion chamberRF50WR hypersilicon piston Ø 47.6mm
7 transfers
Booster Exhaust
New Profile 2018, elliptical, specific, to reduce operating clearances
25mm axle height
Segment Chromed steel Ø47.6x1, domed lapped, made in Japan
Piston pin Ø12x39mm
Set of base gaskets of different thicknesses
Set of cylinder head O-rings
4 cylinder studs
Miscellaneous screws
