Crighton Motorcycles CR700W

Submitted by Jo on Thu, 11/04/2021 - 10:20

Brian Crighton, the man behind this spectacular machine, won three British Championships in the 50 class when he was a young driver.
As a designer he worked at Norton, following the design of the Norton rotary engine racing JPS that won the race before being banned from racing in the mid-nineties.

Its latest creation is called CR700W and comes after twelve years of development started in 2009, together with Rotron Power rotary aircraft engine specialists.
It was unveiled last weekend at the National Motorcycle Museum and has quite impressive features and numbers.

The four-stroke, double-rotor injection engine has a total displacement of the combustion chambers of 699 cc.
It delivers 220 horsepower at 10,500 rpm and the maximum torque is 142 Nm at 9,500 rpm.
The dry weight is around 130 kg, which means that the weight / power ratio is 1.68 horsepower per kilogram.
Further calculations learn that this means that the specific power is 319 hp per liter, insane!

Performances made possible by some particular solutions of materials and processes and - assures Crighton - by the greater ratio between volume and surface than any other rotary engine.

The cooling is liquid with internal sewage and the weight of the engine, including the transmission with six-speed gearbox, stops at 43 kg .

The frame, made by the specialist Spondon , is a traditional double beam in aluminum alloy which contains the lubricating oil tank and has the adjustments for the steering head and the swingarm pivot.

The Brembo braking system has MotoGP-specific calipers and the same goes for the Michelin slick tires.
The wheels are Dymag in carbon fiber and the suspensions are Ohlins , or Bitubo on request. On request as well, you can spec the bike to have an electric motor starter .

Because the CR700W is a track bike, even though it cannot participate in any races, the goal is to offer a MotoGP-like power-to-weight ratio that can give sensations unattainable by other models currently on sale.
For those who are eager to know how this rotary bike is sounding, a small clip below of Brian himself starting his creation.

The bike will be built in 25 units and put on sale at 85.000 pounds or 100.000 euros. If you have this kind of cash, and undoubtedly want to feel what kind of power the MotoGP riders are taming, you can start ordering here.