The bike was built with all new parts; the 490cc powerplant features an R50/2 crankshaft with 5mm longer con-rods, R50S pistons; Schleicher RO160 camshaft; special bearings; 38/34mm inlet/exhaust valves; 2kg flywheel (6.2kg standard); and a 3-litre sump.
The bike also features reconditioned, original Dell’Orto SSI 29 race carburettors supply the mixture, which exits via 38mm down-pipes into a full stainless steel exhaust system. This BMW Racer engine currently produces 42.8bhp at 8,000rpm (at the rear wheel) with maximum torque of 40.5 Nm (29.9lb/ft) at 5,960 revs. The gearbox contains a ‘long’ 1st gear, close 2nd and 3rd ratios and standard 4th (top). All the bearings were also replaced.
The black powder coated frame is based on the BMW RS54; the fork is modified R60 and the rear suspension comes from Hagon.
The fuel tank and seat are original designs by the manufacturer. This BMW racer rolls on 18-inch aluminum wheels with stainless steel spokes and a new Yamaha TZ 260mm four-leading-shoe front brake with modified BMW ‘/6′ hub at the rear. Other features include new Magura handlebar controls, new Bowden cables and numerous nickel-plated parts. Spare parts offered with the bikes are a 32/9 final drive (for longer circuits), sparkplugs, set of rockers, pushrods, carburettor jets, a centre stand, oils and technical information.
Presented in race-worthy condition, the BMW racer has a wheelbase of 1375mm and weighs 158kg ready for the track.
, (E36/8; F25), Lid BMW MCVL