 Large-scale changes were made in 2001, with a complete restyling of the bodywork by designer Gareth Davies, a newly designed engine raising the horsepower to 149 with internal performance upgrades included Forged steel crankshaft, forged steel connecting rods, and forged aluminium pistons.Focussed on reducing weight and better handling, the 2001 955i used a more common double-sided swing arm (DSSA) as opposed to the single-sided swing arm (SSSA) of the previous Daytonas.The DSSA version weighs less than the SSSA due to the lighter weight swing arm, and it is argued that the DSSA version handles better than the SSSA as it has less flex in the swing arm.