the stock sleeves bored that little bit still are much thinner than the weisco sleeves. either way until we see both kits with lots of miles on them we wont know. but so far both seem to be reliable and i know of a few guys who have 30-40k on there weisco kits.

(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves NOW-2010 silver and black tbird