Suzuki SP370: history, specs, pictures

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Suzuki SP370
Manufacturer Suzuki
Also called SP 370
Production 1978 - 1979
Successor Suzuki SP400
Class Enduro
Engine single cylinder, four-stroke
Bore / Stroke 85.0mm x 65.2mm
Compression ratio 8.9:1
Top speed 80 mph (129 km/h)
Horse Power 26.42 HP (19.7 KW) @ 7500RPM
Torque 20.65 ft/lbs (28.0 Nm) @ 4000RPM
Fuel system Carburetor
Sparkplug NGK D8EA '78-79
Battery YUASA 6N4B-2A '78-79
Transmission Gear box: 5-speed

Final Drive: chain

Clutch: Wet multi-plate
Suspension Front: Telescopic fork
Rear: Full floater, swingarm
Brakes Front: expanding brake
Rear: expanding brake
Front Tire 3.00-21
Rear Tire 4.00-18
Wheelbase 55.91 inches (1420 mm)
Dimensions L 86.61 inches (2200 mm)
W 33.5 inches (851 mm)
Weight  (dry), 135.0 kg (wet)
Fuel capacity 2.25 Gallon (8.50 Liters)
Related Suzuki DR370
Competition Yamaha XT500
Manuals Service Manual
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The Suzuki SP370 is a motorcycle produced by Suzuki from 1978 to 1979. The Suzuki SP370 was the first Suzuki motorcycle with a single cylinder four-stroke engine, if you don't count the short-lived Colleda CO and COX models from the fifties. Unfortunately it had a bit too weak engine and it was a bit too expensive to become a great success. Yamaha, for example, could offer the XT500 trail bike for the same money as you had to pay for the SP370. It was made in the US from 1978-1979. Suzuki produced an enduro oriented variant in the Suzuki DR370. It could reach a top speed of 80 mph (129 km/h). Max torque was 20.65 ft/lbs (28.0 Nm) @ 4000 RPM. Claimed horsepower was 26.42 HP (19.7 KW) @ 7500 RPM.


The engine was a air cooled single cylinder, four-stroke. A 85.0mm bore x 65.2mm stroke result in a displacement of just 370.0 cubic centimeters. Fuel was supplied via a overhead cams (ohc).


The bike has a 5-speed transmission. Power was moderated via the Wet multi-plate.


It came with a 3.00-21 front tire and a 4.00-18 rear tire. Stopping was achieved via expanding brake in the front and a expanding brake in the rear. The front suspension was a Telescopic fork while the rear was equipped with a Full floater, swingarm. The SP370 was fitted with a 2.25 Gallon (8.50 Liters) fuel tank. The wheelbase was 55.91 inches (1420 mm) long.

Colors: Red, Silver. Initial frame number: SP370-100001.

1978 SP370C

1978 Suzuki SP370C
1978 SP370 red right side
1978 SP370 red left side
1978 SP370 silver left side

  • FRAME #: SP370-100001
  • ENGINE #: SP370-100001
  • ENGINE TYPE: ... 370cc Four-stroke
  • MODEL CODE: ... 324
  • COLOR: Red
  • Leading axle forks
  • White and silver Suzuki decal
  • Fenders primary color

1979 SP370N

  • FRAME #: SP370-109645
  • ENGINE #: SP370-109448
  • ENGINE TYPE: ... 370cc Four-stroke
  • MODEL CODE: ... 324
  • COLOR: Maroon
  • Leading axle forks
  • Silver Suzuki decal
  • Fenders primary color

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