Complex sentence: The model's appearance remained mostly unchanged from its introduction in 1999 and an engine revamp with the assistance of Lotus in 2002 endowed it with and of torque from a lighter engine--the bike is dry.
Split into simpler sentences: The model's appearance remained mostly unchanged from its introduction in 1999. An engine revamp with the assistance of Lotus in 2002 increased output to and of torque from a lighter engine--the bike is dry.