Yamaha FZR 750RR OW01

If this machine looks like a racer, it's because it is! Thinly disguised to make it street  legal, removal of the tax disc, number plate, mirrors, indicators and side stand and fitting some slicks prepares it for the racetrack. Why, then, is it available to the road rider? The reason is relatively simple. The OW01 was built to compete against Honda's RC30 and Bimota's YB4 in World Super- bike racing. In order to campaign a machine in this class certain homologation rules have to be met; these depend on the annual output of motorcycles. If a manufacturer produces more than 100,000 units a year, a minimum of 1,000 of its Superbike contender must be built.

Between 50,000 and 100,000, 500 Superbikes are necessary. Small scale manufacturers (like Bimota) only have to build 200 Super-bikes to be eligible. In Yamaha's case they have to build 1,000, which means that some go on sale, albeit at huge expense, for road use. They come sparsely equipped for the task.
The OW01 isn't a road bike, it's a sports-stiff, high-revving, factory racer. As standard, it comes pretty competitively set up for the track. An expensive racekit is available to further hone its fiery performance and turn what's already a lean and purpose-built beast into a real short-fuse, speedball racetrack weapon.
Apart from the wonders of five-valve technology and inclined cylinders, the OW01 has little in common with the popular FZ750 roadster. Instead it's cobbled together using lessons learnt from the rare and precious YZF750 Genesis, the factory endurance racer, with lots of FZR1000 bits and knowhow thrown in for good and plentiful measure.
 

The engine is incredibly oversquare and short-stroked. Every part of its assembly is dedicated to getting the biggest and most efficient bangs for your money. It sucks through forward-facing fresh air ducts in the fairing, mixing and feeding the gas through large flat-slide 38mm Mikunis. It has big' valves and big, hand-finished ports. Lightweight, short-skirt, stepped-top pistons with large valve cutaways ride on titanium con rods and compress the gas to 11.2:1 (with the racekit this is upped to 13.5 or more). At the same time as it controls ignition timing. Providing a fat spark, an eight-bit microprocessor decides when to activate a servo motor operating a butterfly valve in the collector of the stainless steel four-into-one exhaust system. As on the FZR1000, this exhaust valve (EXUP) compensates for losses in the mid-range that are inevitable in any engine developed for maximum power and torque. The EXUP rotary valve has to close off up to 70 per cent of the exhaust and operate in temperatures of up to 700-degrees C. but it certainly works.

What should be an essentially peaky, sky-high, rev-happy motor is actually endowed with a useful, long flat spread of torque. It can be ridden from 0-5000rpm with fast response and the delivery is crisp, flexible and smooth. It reserves its best power for between 8000 and 13,500rpm, quite a wide range of meaty acceleration. In its stride, it peaks at about 12,000rpm. Translate that through six close-ratio gears into road speed and in top the bike clocks 162mph. A race-kitted version, lighter and more powerful will be tall-geared for over 170mph.

With the cylinders angled forward at40-degrees (instead of the 45-degrees of the FZ750 road bike), Yamaha's chassis designers took full advantage of the layout and assembled a short, stiff frame, a short wheelbase, fast steering geometry and lots of Ground Clearance. The deep section aluminium Deltabox frame is obviously rigid and the swing-arm is beautifully crafted. Suspension front and back is by top notch Öhlins units which are multi-adjustable for individual ride preferences.

The huge brakes sport Nissan four-piston racing calipers and 320mm discs.

Generally, the bike is very stable on the power, though the steering isn't as quick and nervy as racers typically like. Although the bike is clearly competitive weight-wise, in standard trim it has to be wrestled with, needing a firm grip and a lot of rider input. Naturally, it wouldn't be a racer unless just about every part of its handling performance could be changed to suit the rider. The OW01 has more power, performance and commitment than the road rider could ever need.