The engine is a six-cylinder
four-stroke,
horizontally-opposed, 5,254 cc (320.6 cu in) displacement, air-cooled, direct-drive, gasoline engine design. It employs dual
electronic ignition and produces 180 to 200 hp (134 to 149 kW) at 3300 rpm.[1]
Variants
UL520i
Base model with fuel injection and a
compression ratio of 8:1, producing 180 hp (134 kW) at 3300 rpm[1][2]
UL520iS
Model with 8.7:1 compression ratio, fuel injection, producing 200 hp (149 kW) at 3300 rpm[3]
UL520iST
Model under development, fuel injection, turbo-normalizer, producing 220 hp (164 kW) at 2700 rpm sea level[4]
UL520iSA
Inverted oil system version of the UL520iS, producing 200 hp (149 kW) at 3300 rpm[5]