last first. will a gen 1 seat fit a gen 2. bike No. will a gen 2 seat fit a gen1 bike Yes. but it looks ugly.
the difference is in the underside profile of the seat the gen 2 has a sort of bump in the side panels towards the back so it fits the profile of the side panels. the gen 1 is flat so fouls the side panels and won't fit.
the gen 1's seat underside has a flat profile to fit the profile of the gen 1. but the seat off a gen 2 will fit but there will be a ugly void at the rear section between the seat and side panels.
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