yes they most certainly will 27..the C model forks are identical and perfectly legal in every way for pre '78

my pre '78 RM125 has an A frame and swingarm, A model tank, '78 PE250 forks/triples, '78 C rear shocks, '78 front wheel and A model rear. The engine itself is a '78 C but it too is flow on with little change from the '77,,it's all legal
