new: 4895 Engine capacity: 649cc Power: 71bhp Torque: 48lb ft Weight: 178kg Seat height: 790mm Fuel capacity: 15.5L 0-60: 4.5 seconds Tank range: 140 miles Full Review: When TWO tested the naked ER-6n a few months ago it proved a real surprise

. There was something different about it compared to the bike I had seen at the Milan show when it was launched. When I spoke to one of the Kawasaki men about it he told me the exhaust system on the Z750 was new. When the bike was first shown it had black painted down

-6 was launched, the under-slung exhaust was so quiet that all the engine noise came from the airbox. And true to 180¡ parallel-twin form, it sounds and feels exactly like a small V-twin engine rumbling away beneath you. Kawasaki have never made a

'. There are so few differences between the two bikes that Kawasaki would have had to screw up spectacularly for this to be any less good than its naked sibling. Apart from the fairing, the ER-6f has a slightly longer wheelbase, subtly changed geometry

-up trundling, all of these are within easy reach on the big Z.I can’t help thinking that Kawasaki couldn’t have made it just a little badder in the riding experience, though, to go with that mean styling. If the Zed were mine I’d be looking for some pokier

. To make the S more pillion-friendly Kawasaki has dumped the stepped separate pillion and rider seat found on the naked Z750 in favour of a one-piece unit on the S version. Unfortunately it slopes too steeply downwards, meaning your body inevitably slides

In short:Less powerful version of the Z800 designed for A2-compliant restriction Production date: 2013 Price new: 6899 Engine capacity: 806cc Power: 93.6bhp Torque: 56lb ft Weight: 226kg Seat height: 834mm Fuel capacity: 17L

, even looks good Overall: These can be picked up quite cheaply, they won't intimidate less experienced riders, and are good for commutes or tours or just Sunday runs. Kawasaki spent nearly 3 decades on this engine layout and its reliable and easy to work on

In short:The classic courier's tool. Will be around forever Pros:The classic courier's tool. Will be around forever Cons:The classic courier's tool. Will be around forever Top speed: 110mph Engine capacity: 553cc Power: 56bhp Torque: 32lb ft Weight: 201kg Seat height: 800mm Fuel ...

takes over from the Z750 which has been a nice little earner for Kawasaki, with almost 160,000 of them sold since its launch in 2003.I remember riding the first version back in 2004 and falling for its simple charms. In a sea of naked rev-hungry 600s