Vintage Dirt Bike Q & A

Im working on a CL125S and the kick start return spring is shot, i have heard a "roomer" that there is a "update" or replacemen that allows you to have the assyembaly on the clutch sied, so ya aint gotta split the case, is this true, an old-timer honda dude was telling me this,
he was telling me they had an assembly like the mt125e that replaced the sl and cl type, any info. would be a big help