[Darren69]

88713.2036 is the same part number listed in the '02 manual, so I think they're the same and your dealer friend maybe getting the type of flywheel mixed up with the earlier single phase change over which occurred a few years earlier on the 916 possibly? AFAIK all S4 had the 3 phase type which I thought was the same as all ST4/Monster/996 and the later 2v IE bikes (ST2/900SSie/Monster S). Some of the 2V ones (like the '01 900Sie) could have had a bit of a mixture depending on model and year so it's a bit less clear cut with those, since the factory was in the process of the TPG takeover around that time but they should I would have thought matched engine with frame type. It's probably worth checking just in case anyway.