Pre-Unit DONNY Triumph Billet Crank Case With Timing Cover
Part Number 70-2892/2314/A
"Donny" crankcases for pre-unit Triumphs now being distributed in North America by British Cycle Supply Company:
The world's strongest Triumph crankcases are now readily available in North America. CNC machined from billets of bulletproof aircraft grade "6 series" aluminum alloy, rather than cast like others, these cases are capable of handling the horsepower from big bore cylinders, hot cams, nitro fuel, stroker cranks, and superchargers without wincing, or can simply be used to replace the unobtainable original pre-unit crankcases.
This is a special order product, please call for more information.
Supplied with a timing cover set up
for RH crank seal and RH ignition as used on unit Triumphs, but maintaining the
ability to run the original rear mounted ignition, these cases allow for tons of
flexibility when engine building.
"Donny" cases have been used by designer Donny Coveney in roadracers and dragracers achieving 90 plus horsepower, and are capable of taking much more. Complete with hardware, and fully machined, these cases incorporate many improvements over stock Triumph cases, and are definitely the way to go if building a hot pre-unit Triumph.
Allen bolts are stainless, base stud inserts are 4140 chromoly, and cases are supplied ready to accept 72mm Superblend crank bearings for the ultimate in reliability.