Topic: Do 750 tubes fit in 500 fork lowers?

[jakec]

I'm building this 500 chop and it has 4 over tubes. I want to get some 6 over or more tubes but they are only available for 750 it seems. just wondering if the fork tubes are compatible. The 500 fork assembly was not like others I have seen (400, 750). There was a damper? hole in the sides of the tubes. Also this threaded rod on the top of the damper tube which captures the spring.

[jakec]

I did find these but they are rather pricey. I can find 750 ones for much less.

https://www.ebay.com/itm/NOS-NEW-ROCKY-HONDA-CB500-CB-500-6-FORK-TUBES/262400573733?epid=1628483924&hash=item3d184b0125:g:PMQAAOSwdrRXGmrN

[bryanj]

Diameter is same, internals are different so damping may be compromised but then with 6 inch over will it make a difference? The 750 are longer than 500 standard

[seanbarney41]

Why not just get 750 lowers and tubes?  Super easy to find and should be cheap.  Should work with 500 triple, wheel, and brakes.

[jakec]

Why not just get 750 lowers and tubes?  Super easy to find and should be cheap.  Should work with 500 triple, wheel, and brakes.

That is a good idea.

[bryanj]

Depending on yearof 750 brakes vary a lot from 500

[jakec]

I was looking at these for sale locally. The set on the left are 6 over.



The brake stay tabs look different. Can you fit the 500 brake on there? Looks like they fit this type of caliper.



We just purchased a new reproduction caliper from 4into1 because the existing one was seized up. We just got this:

[bryanj]

Nope, the left forks (6") are early 750 and use a completely different caliper bracket, swing arm and caliper plus thedisc is a different size so its not that easy

[jakec]

I also have a cb550 parts bike that I could use the forks off of. Their internals look "normal." and I guess finding longer tubes would be easier (maybe even compatible with the 750?).