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Forty-two years after it rolled off the production line, owner Tony Clements reckons that it’s possible to keep an 650 Thunderbolt in better-than-new condition, and he’s got the prizes to prove it…

Last month Rod Gibson stripped the engine on our 1972 Kawasaki Z1, despite a struggle to separate the barrels from the crankcase. Now all the components can be examined

The Kawasaki Z1 is the definitive Japanese four – the bike that launched a thousand clones. Rod Gibson strips an original 1972 model to see what makes it tick…

The AJS (and Matchless) CSR ‘range toppers’ were never quite as revered as the Bonnie or hot Beesa twins, but they were quick machines…

The TR6SC was ostensibly a single carb version of the TT Bonnie, sharing many of its basic components…

The Norton Jubilee was launched in 1958, Norton’s Diamond Jubilee year, and though it perhaps wasn’t universally loved, it still has its devotees to this day

Kawasaki’s screaming triple two-strokes found a place in most bikers’ hearts. Adrenaline-fuelled power delivery and unsual handling was a recipe for many memories! Here we focus on the baby of the range – the 250…

Suzuki’s rotary-engined RE5 was a high tech but heavy and thirsty alternative to conventional piston-engined superbikes. It didn’t catch on…

Yamaha’s 350cc YR2C may be rare in the UK, but that’s because the twin cylinder street scrambler was aimed fair and square at the US market. It was another landmark product for Yamaha…

Twenty five years ago, the young Rod Ker always thought the GS750 was a better bike than its 1000cc successor. So it’s with some reluctance that we have to report that this test has done nothing to change the churlish Mr. Ker’s mind…