Look at these at STM
http://www.stm.to.it/en/moto/ A J Racing
www.ajracing.info 01453 845544 mob 07957 166896
I just got new plates from him, in post next day lots of help great !
48 tooth lasts lots longer and so does the basket you can still fit the six bolt face with a 48 tooth basket
STM still recomend 12 tooth for 120bhp pluss engins. but AJ said he runs 150 bhp with the 48 tooth evo.
A J Racing said I should change but the basket on mine is still fine. the plates wear in to the side of the basket but you can file them out not to much. £170 for the 12 tooth S T M plates !
Only a personal thing but I don't want a flying sorcer for a clutch,give me the classic look anyday