Honda CB500 Four

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CB500 Four K1 1972
Also calledHonda CB500 Four K model
SuccessorHonda CB550
Engine498 cc (30.4 cu in) air cooled 8-valve SOHC transverse inline-four
Bore / stroke56 mm × 50.6 mm (2.20 in × 1.99 in)
Compression ratio9:1
Top speed100 mph (160 km/h)[1]
Power50 hp (37 kW) (claimed)[1]
SuspensionFront: 35 mm telescopic forks
Rear: Twin shocks with adjustable pre-load
BrakesSingle front disc, rear drum
TyresFront: 3.25 x 19 in
Rear: 3.50 x 18 in
Rake, trailRake: 64°, trail: 105 mm
Fuel capacity14 L (3.1 imp gal; 3.7 US gal)

The Honda CB500 Four was a motorcycle introduced by Honda early in the 1970s, appearing at the London Racing and Sporting Motorcycle Show in February, 1972.[2] It was similarly styled to the CB750, but smaller and lighter, with the manufacturer's claims of 50bhp output and a top speed of 115 mph.[2][1]

Like the earlier CB750 it had a single front hydraulic disc brake, rear drum brake, electric starter, and sohc eight-valve engine. The four-into-four exhaust pipes echoed those of the CB750.

Reviewing the 1972 show models, UK monthly magazine Motorcycle Mechanics described the CB500 as "one of the 'show stealers'. Four cylinders, in-line across the frame, four carburettors and single overhead camshaft motor, coupled to a five-speed gearbox give this 500 cc machine the performance of a 650 twin cylinder bike".[2]

Unlike the earlier dry sump CB750, the smaller bike has a wet sump engine. Also, the primary drives were different, the CB750 having a duplex chain, while the CB500 had a "Hy-Vo" Morse chain.

Several CB500 machines were entered in the Production TT races on the Isle of Man in the early 1970s. Bill Smith won the 1973 500 cc TT Production race (four laps) riding one, 8.2 seconds ahead of second place Stan Woods mounted on a Suzuki T500 two-stroke, twin.[3]


  1. ^ a b c "The Honda CB500 Four". Motorcycle Classics. November–December 2008. Retrieved December 23, 2017.CS1 maint: Date format (link)
  2. ^ a b c Motorcycle Mechanics, March 1972, pp.28-29 Scene at the Show '72. Accessed 15 June 2015
  3. ^ "Race Results - The official Isle of Man TT website". Retrieved 2011-12-30.