Complex sentence: At first, there was a little controversy since MotoClub de Costa Rica has this rule, that the minimum age to ride 125's was 17, in the end M.C.C.R. modified this rule and Ernesto was perfectly legal in the 125cc class.
Split into simpler sentences: At first, there was a little controversy since MotoClub de Costa Rica has a rule, that the minimum age to ride 125's was 17. In the end M.C.C.R. modified this rule and Ernesto was perfectly legal in the 125cc class.