Looking to replace rusty rims on my '76 CB550F. A friend has clean rims from a '79 CB750k - front is said to measure 1.85 X 19 and the rear is said to measure 2.15 X 18 w/ a 38 tooth sprocket. Will these work? Will the sprocket work? If not, can the sprocket be swapped out for my original. Please help - this is very confusing and nobady can seem to give me a definate answer either way.