I too did a rather modest conversion on my '01 883 and it is all I need.  I
used my 883 jugs and heads and went with 9.5:1 Wiseco reverse dome pistons
and 1200 conversion valves (basically same as stock 1200 valves).  It
dynoed at 71hp @ 6000 rpm and 72 tq @ 3300.  I did it back in '02 and the
bike has run almost flawlessly since (I know I shouldn't say that, but for
the sake of giving friendly advice, here's hoping I didn't just jinx
myself ;-)).   I would love to do a more testosterone-ladened upgrade....
just because, but as long as it keeps running so smoothly, I'm not touching
the engine.  I did just replace the stock shocks and fork springs with
Progressive 412's, but due to the weather here I haven't had a chance to
give it go.  Maybe this weekend!  Have a good one all.

Scott Liddle
FastBlack '01 883-1200
Bucks County PA