because they are coated with nikisel (spelling). they either need to be re coated or have sleeves put in. i went with the sleeve option for a few different reasons, but some have gone with re coating and have been happy also. i say just go with the weisco kit from bonnevilleperformance.com and be done with it.

Frank

(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