Honda CB750 Fork Tubes - Late Models

Additional Information

Fitment Information

• Replacing stock tubes on my 1975 CB750 with the 6" over tubes. So all the guts go back in as per the stock configuration, right? And the 6" spacer for the stock springs: Am I making it myself or do you guys carry the spacer as well?

  If you have a 1975 CB750K, these fork tubes will fit your bike. These tubes would be assembled exactly as the stock tubes. You would have to provide your own spacer. Some folks on blogs suggest PVC as a spacer, but I do not think this is a good idea as may be prone to cracking. I would suggest a solid aluminum,round bar stock spacer available on eBay or even a piece of galvanized pipe from a place like Home Depot. Home Depot may have the aluminum bar stock as well.

  Answer by: rick c (Admin) on Apr 30, 2019 10:07:00 AM

• I need a set of fork tubes for a 1980 CB 750 F Super Sport. Stock are 35mm OD. Are these the correct fork tubes?

  The only information we have from the manufacturer is that these tubes fit the 1973-78 CB750 models. We do not know if they will fit any other model.

  Answer by: rick c (Admin) on Jan 6, 2020 2:36:00 PM

• I have a 1977 Hondamatic. The fork tubes are 35mm and are 23 inches long. What's the length of these? Do you have the 23 inch forks?

  The 45-39631 have an overall length of 23-13/16", which should be the stock length for a 1977 Hondamatic. If yours are exactly 23", please let us know so we can check into it further.

  Answer by: Web Support (Admin) on May 30, 2017 1:28:00 PM

• Hello.Im looking at the +10 tubes, will they fit my
  1972 CB750K2?

  On the CB750 there was a change in fork tube design and part numbers between the 72-73 model years. These extended tubes will only fit the later model years and will not fit the 1972 CB750K2.
  We do carry the stock-length replacement tubes for your bike:
  http://www.nichecycle.com/ncs/categories/suspension/fork-tubes/45-39638-fork-tube-early-hon-cb750-by-emgo.html

  Answer by: rick c (Admin) on Jun 13, 2019 1:06:00 PM

• I am looking for some longer fork tubes for a 1971 cb500 they are 35mm as well, will these work with my stock legs?

  The fitment provided by the manufacturer is for 1973-78 CB750 models. This is the only bike we know for certain these forks will fit. Unfortunately, because of the age of these bikes, I cannot easily find an online parts Honda parts manuals of this vintage to see if the CB500 shared forks tubes with the CB750 of later years.
  My guess is these will not work on your CB500. I restore a lot of vintage Hondas and I know that while the outside OD may be the same, the internals of the fork may not be. That typically means different threading, chamfers in different locations and holes for valves drilled in different spots.
  You could order up a set of custom forks. Forking by Frank would be the folks to contact:
  http://franksforks.com/

  Answer by: rick c (Admin) on Mar 13, 2020 10:20:00 AM

• I have a 1979 CB750. The forks I need are 35mm (outer diameter) by 600mm (length). Which of the options you have will be correct for my requirements?

  These are 35mm in diameter, and the 45-39631 are the correct length, but as for direct replacement, these tubes are not listed to fit the 1979 and later models. I am not sure what the differences might be.

  Answer by: Web Support (Admin) on Nov 29, 2022 9:46:00 AM