Born out of a trend for fast 250cc two-strokes in the 1980s, Kawasaki’s KR-1 made up for its lack of cool with sheer raw performance. And with a production run of just one year (three if we include the KR-1S), the quick Kwacker had the briefest of brief encounters with the British bike buying public.
Quarter-litre bikes were commonplace in the ‘70s and ‘80s. One of the standard motorcycle capacities (the others being 50cc, 125cc, 350cc and 500cc) used in racing, they filtered down to the road and sporty 250cc two-strokes like the Suzuki X7 and Yamaha RD250 were popular choices for chip shop racers of the time.
Suzuki moved the game on in 1983, with the seminal RG250 – a race replica that looked like it could have just ridden off the Grand Prix track – and started a trend for increasingly sporty bikes that included Yamaha’s TZR250 and Honda’s NSR250.
Kawasaki’s entry was the KR-1, a parallel twin first introduced in 1989. It immediately made an impression by being the fastest bike in the class, but where competitors were updated and reinvented almost every year to meet demand for the latest fashions, Kawasaki largely neglected its stroker.
The KR-1 was arguably dated on launch, with its boxy styling and skinny wheels (the rear being a difficult to shoe 18”-er) it looked more like a child of the early ‘80s than a cutting edge race replica ready to take on the 1990s. It made more power than anything else in the class, but in an increasingly fashion driven world it didn’t have the looks or racing pedigree to match its motor. To make matters worse, the KR-1 quickly gained a reputation for being unreliable – with the highly stressed motor regularly lunching its pistons.
There was one update. The KR-1S came with a new model name and some updates, even though it largely looked the same. The frame was different, identified by its smooth rather than ridged finish, brakes were improved and the rear wheel was wider (but still 18”). It would continue to be the quickest and feistiest bike in the class, but it still couldn’t compete with the trendier competition. Young buyers wanted V-twin engines, upside down forks, banana swingarms and more contemporary styling and graphics, something the Kawasaki had nothing of.
That said, the engine on the S made it stand out. Modifications included revised porting, new exhausts, different pistons and nickel plated cylinders unleashed some more power (a claimed 65bhp, but a more realistic 55bhp) and made some kind of attempt to address the original KR’s woeful reputation for poor reliability.
The resultant KR-1S was another club racer’s dream, being fast, sweet handling and very, very tuneable. It won lots of trophies, but in a sector where image was everything, the Kawasaki didn’t have a lot going for it with road riders. Team Green wasn’t active in Grand Prix racing and where Honda, Suzuki and Yamaha built V-twins that echoed their factory 250cc racers, the KR-1 had very little street cred, with its ‘80s styling, conventional forks and the 18” rear wheel that made tyre choice a chore even then.
By 1992 the Kawasaki KR-1S had run its race. It failed to make much impact in this fashion driven category and couldn’t shake off its (justified) reputation for being desperately fragile and fond of the odd tank slapper. Less than 10,000 examples were reportedly built and sold worldwide in a three-year production run of the KR-1 and KR-1S, as well as the Japanese market KR-1R which had bigger carburettors and a close ratio gearbox for better race track performance.
Today, the Kawasaki KR-1 range has gained something of a cult following, with its rarity making good examples highly collectable. The bike’s poor build quality and penchant for breaking engines mean that almost all will have been rebuilt and sorted by now. Much of the early problems were traced to slack tolerances during the manufacturing process, and a well sorted KR is now a raw and lively ride that’s not as scary a proposition as it once was (although highly tuned two-strokes, by their very nature, will always require a lot of maintenance). We recently did a track day on an ex-race KR-1S, something you can read about here.
While 250cc race replicas continued to be available into the 21st century, Kawasaki bowed out after the KR-1S. They would, however, focus on developing the four-cylinder 400cc four-stroke ZXR400, which certainly delivered in both the performance and fashion stakes. The KR-1’s reign may have been brief, but it was certainly spectacular.
Specs:
Engine: 249cc, water-cooled, two-stroke parallel twin
Power: 55bhp @ 10,500rpm
Torque: 37Nm @ 10,500rpm
Seat height: 855mm
Weight: 123kg (dry)
