Front fork lengths

[Rjgordon0]

Hi all, just bought two 1977 & 1978 CB750F2 supersports & have been renovating them. The 78' came in bits, the frame etc already painted & ready to build. The 78' is a complete non running shed of a bike. Just finished reassembling the 77' forks & realised they are approximately 30mm longer than the 78' forks. Upon a strip down the 77' fork stanchion pipes are longer than the 78's !! Does anyone know why as they are meant to be the same bike ?

[hairygit]

In 40+ years they could be from a different Honda due to accident damage/rusty stanchions etc and someone fitted whatever was available bat the right money.

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[Bryanj]

Somebody fitted 3 inch overs for a chopper look?
Are the springs the same length with a spacer?

[hairygit]

Somebody fitted 3 inch overs for a chopper look?
Are the springs the same length with a spacer?

30mm is barely over an inch Bryan  (bloody foreign metric measurements!)

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[Rjgordon0]

Hi, the spring lengths are the same & so are the fork slider bottoms. The inner damper rod that is fixed to the bottom slider via machined hole at the base & a socket screw is approx 30mm longer as well. I guess I would need to find out from Honda the correct lengths per item for model & year. The suggestion that they came of another bike due to the age is perfectly feasible. I could leave it for the time being & see how the bike sits when finished !!!
Thanks for the replies 😎