When I did My 883 to 1200 conversion...
I Just did the cyl's and 1200 pistons leaving the rest alone..
I wanted Low End Torque..... for the Least $$ spent..
I used the Wiesco 10.5/1 1200 pistons (a bit much on compression tho!)
hind-sight :: I would of used 10.0/1 for the lack in availability to get Good Gas today (octane 95 needed)
Refreshing the valve grind and other than that ,, used the 883 heads.. THEY develop a LOT of torque... so I kept them stock..
Jetting the carb and SE slip-ons with SE air.....
Believe me when I got it back together and 30/60/30 the new rings into break-in,,,,What a BEAST!
I had a 2005 883 the would WHIP any stock big bike and then some......
very Quick....
signed....BUBBIE