54.4 mm Stroke

PAY ATTENTION: THIS KIT IS NOT FOR SALE TO THE PUBLIC.  If you are interested in purchasing our products, you can find in the other sections of the e-commerce site the spare parts for routine maintenance that are equivalent or improved compared to the corresponding original spares but without overturning the engine.

The new kit version is version 3.

PAY ATTENTION: Everything that follows is the old page referred to version 2 of the kit. This page is obsolete and is left here only for historical reasons and to show the differences. Version 2 of the kit is discontinued.

Components of the 54.4 mm stroke converison kit. This kit allows to vary the base dimensions of the RG 500 Gamma engine from 56x50.6 mm to 54x54.4 mm; the 498 cc displacements is unchanged but the whole thermal group and crankshaft group are replaced with others that are definitely more recent in design. The kit includes cranks, cylinders, heads, pistons and everything else is needed to assemble it like fasteners and gaskets: in these pictures you can see only a subset of the whole kit, the rest can be found below in this same section browsing the product list.

The kit includes special steel crankshafts hardened and ground, magnesium-aluminium alloy cast cylinders and adapter plates CNC machined from billet 7075 aged ergal that allow to assemble the cylinders with the stock RG Gamma bottom end as shown in following pictures:

The kit is strictly derived from the SGM products on sale on this same site: some components like rods, pistons, heads, needle bearings are exactly the same, while others like crankshafts, cylinders, main bearings were modified as required to make them compatible with the stock RG Gamma bottom end.
All SGM components are state of the art, race tested and subject to continuous development; the RG conversion kit will always be kept up to date to the latest version of the components it is derived from.