I use 16t front-sprocket on both my 2002 pre-gen and 2008 new-gen bikes. Really calms the revs on commute to S.F. and makes for more relaxing ride. It fits no problem on 2008 new-gen.
On 2002 pre-gen, the tall side-plates on chain I had caused it to rub on sprocket cover. Originally, I was going to mill 3mm deep channel inside cover for chain-clearance. Easier solution was just to use 2008+ new-gen sprocket cover.
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