SUZUKI has just unveiled two new GSX-R-engined litre bikes.

The GSX-S1000 is the firm's much spied new naked bike while the more surprising new GSX-S1000F is essentially the same machine given a full fairing to make a sports tourer.

Both use the 999cc engine from a 2008 GSX-R1000, retuned for more low-to-mid-range output.

It's housed in a new aluminium chassis and comes with three-mode traction control, catering for wet, city and sporty riding conditions

The new models are also offered with ABS.

The aluminium swing arm is taken from the current GSX-R1000, with a shock that's adjustable for rebound damping and spring pre-load.

The forks are fully adjustable upside-down KYBs while the brakes are Brembo monoblocs.

Suzuki says the '08 GSX-R engine was chosen because its long-stroke design offers good low-to-mid-range power and torque, making the new naked bike 'more suitable for street riding'. It's been given new, lighter pistons with iridium spark plugs.

New cam profiles are designed to optimise valve timing for a 'power character that’s more suited to the streets and winding roads'.

The exhaust is a four-into-two-into-one system which Suzuki says further contributes to strong low-to-mid-range output.

A digital instrument cluster tells riders their average and current fuel consumption

The seat height is 815mm, one of the lowest in 1000cc sport naked class according to Suzuki, while the tank is slim, making it easier to reach the ground.

Suzuki says the frame weighs less than that of the current GSX-R1000, while the aluminium swing-arm is 'derived straight from the current GSX-R1000'.

The riding position is aimed at 'sporting comfort'.