Motus MST Prototype (2011)

The Motus MST Prototype is a 2011 motorcycle powered by a four-stroke, 90 o V4 engine with a capacity of 1,645 cc. The engine is constructed of a 356-T6 cast aluminum block and heads, forged steel crank, cam, rods, and aluminum pistons with a linerless Nikasil bore. The bike has a firing order of 1-4-3-2 and a compression ratio of 11.5:1. It has a maximum power output of 120 kW / 161 hp at 7,800 rpm and a maximum torque of 165 Nm / 122 lb-ft at 4,500 rpm. The bike features a wet, multi-plate clutch and a 6-speed sequential gearbox with a chain drive. The chassis is a chromoly tubular trellis spaceframe with the engine as a stressed member. It has a rake of 26 o and a trail of 108 mm /4.25 in. The bike’s front suspension is a 43mm inverted telescopic fork that is fully adjustable, and the rear suspension is a twin spar chromoly swingarm with a fully adjustable pushrod monoshock with remote preload adjustment. The front brakes are 2 x 320 mm floating discs with 4-piston monoblock radial calipers, and the rear brake is a single disc with a 2-piston caliper. The front and rear wheels are 3.5 x 17 and 6.0 x 17, respectively, with Michelin Road Pilot 2CT tires. The bike has a seat height of 787mm / 31 in, a dry weight of 227 kg / 500 lbs, and a fuel capacity of 22.7 liters / 6.0 US gal / 5.0 Imp gal.

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Technical specifications:

Make Model: Motus MST Prototype

Year: 2011

Engine: Four stroke, 90 o V4, dual OHV, pushrod, chain-driven single cam; hydraulic lifters

Capacity: 1645 cc / 100 cu-in

Materials: 356-T6 cast aluminum block and heads; forged steel crank, cam, rods; forged aluminum pistons; linerless Nikasil bore

Firing order: 1 — 4 — 3 — 2

Bore x Stroke: 86.5 mm x 70.0 mm / 3.41in x 2.75 in

Valves: Intake ~A44.5mm (1.75in); Exhaust ~A36.8mm (1.45in); stainless steel

Cooling System: Liquid cooled

Compression Ratio: 11.5:1

Ignition Sequence: TDC — 345 o — 435 o — 630 o

Ignition: Electronic CDI

Starting: Electric

Max Power: 120 kW / 161 hp @ 7800rpm

Max Torque: 165 Nm / 16.7 kgf-m / 122 lb-ft @ 4500rpm

Clutch: Wet, multi-plate

Transmission: 6-Speed sequential gearbox; unit construction

Final Drive: Chain

Chassis: Chromoly tubular trellis spaceframe; engine as stressed member

Rake: 26 o

Trail: 108 mm /4.25 in

Front Suspension: 43mm inverted telescopic forks, fully adjustable

Front Wheel Travel: 120 mm / 4.7 in

Rear Suspension: Twin spar chromoly swingarm; fully adjustable pushrod monoshock with remote preload adjustment

Rear Wheel Travel: 120 mm / 4.7 in

Front Brakes: 2 x 320 mm floating discs, 4-piston monoblock radial calipers

Rear Brakes: Single disc, 2-piston caliper

Front Wheels: 3.5 x 17, aluminium; Michelin Road Pilot 2CT tires

Rear Wheels: 6.0 x 17, aluminum; Michelin Road Pilot 2CT tires

Seat Height: 787mm / 31 in

Dry Weight: 227 kg / 500 lbs

Fuel Capacity: 22.7 Litres / 6.0 US gal / 5.0 Imp gal