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The ideal engine for a new American sport tourer did not exist until we built it. After careful consideration of engine configurations, valve-train options, fueling technologies, and bore/stroke combinations, the mighty V4 "baby block" was born. It is the heart and soul of every Motus MST - a 100 cubic inch, 160 horsepower, pushrod V4 that delivers massive torque with a wide, smooth powerband, low maintenance and an exhaust note that only existed in our minds until now. The engine is currently undergoing extensive durability testing and preparation for production in 2013.




Engine type
1645cc (100ci) liquid-cooled 90º V4; dual OHV; pushrod; chain-driven single cam; hydraulic lifters

Transmission
Motus 6-speed sequential gearbox; unit construction; wet multiplate clutch

Bore x Stroke
86.5mm (3.41in) x 70.0mm (2.75in)

Compression
11.5:1

Valves
Intake Ø44.5mm (1.75in); Exhaust Ø36.8mm (1.45in); stainless steel

Dimensions
610mm (24in) L x 492mm (19in) W x 508mm (20in) H

Performance
Minimum 161bhp @ 7800rpm; 165Nm (122lb-ft) @ 4500rpm; 8000rpm redline

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

Firing order
1 - 4 - 3 - 2

Ignition Sequence
TDC - 345º - 435º - 630º

Crankpin Offset
75º

Minimum Octane
87