Cheap-O Motor - Cost 50 coins - Range 4 - Pretty loud, with a short range and slow as molasses. Requires A1 license.
Low Noise Motor - Cost ? - Range 5 - Fairly quiet, with a short range and not much speed. Requires ? license.
Power Motor - Cost ? - Range 10 - Loud, with a large range and decent speed. Requires A7 license.
Ultra Stealth Motor - Cost ? - Range 6 - Almost silent, with a short range and slow speed. Requires ? license.
Hyper Jet Motor - Cost ? - Range 14 - Deafeningly loud, with an enormous range and tons of speed. Requires B5 license..