1978 | SP370

Lightweight 4-stroke big single-engined model for on- and off-road riding


The SP370 pairs a compact 370 cm³ 4-stroke 1-cylinder SOHC 2-valve engine with a highly rigid semi-double cradle pipe frame that uses high-tensile steel pipes. Since maximum torque of 28.4 N·m arrives at 4,000 rpm, this is an easy-to-handle engine with flat torque characteristics from low- to high- rpm ranges. This model also realizes excellent cushioning performance with a front fork stroke of 195 mm. It also features an aluminum bottom case to reduce unsprung weight and a forward-tilted inverted rear suspension with nitrogen gas-filled shock absorbers to create a longer cushion stroke. In addition to the compact engine, the SP370 is also distinguished by its extremely lightweight chassis that realizes a dry weight of only 123 kg.

Dimensions and weight Dimensions Overall length 2,200 mm
Overall width 850 mm
Overall height 1,180 mm
Wheelbase 1,420 mm
Weight 123 kg (Dry)
Engine Engine type 4-stroke, 1-cylinder, air-cooled, SOHC
Engine displacement 369 cm³
Bore x stroke 85.0 mm × 65.2 mm
Maximum power 18.4kW(25PS) / 7,500rpm
Maximum torque 28.4N-m / 4,000rpm
Transmission 5-speed constant mesh
Front tire size 3.00-21-4PR
Rear tire size 4.00-18-4PR