Topic: Swing Arm Rebuild

[motormayhem]

Hello,
I'm just starting down the path again of building my CB 750 K0 back into a bike after being stored in pieces for the last 5 years. First on the list is re-doing the swing arm bushings.

I did some reading on the topic and it looks like there are a few options. My bike is the older style with the straight non-top hat bushings and the felt seal asy. The plastic thrust caps are cracked and the internal pivot sleeve is scored (see pic below....I'm assuming this isn't re-useable?).

With that it seem my two options are as follows:
Rebuild the original asy getting a new pivot sleeve, bushings, and thrust caps - It seems these are mostly available from a quick look.

Rebuilt with the top hat style bushings, a new pivot sleeve, and use end caps from a later model with the seal (https://www.cmsnl.com/honda-cb750k6-four-usa_model14380/cap-dust-seal_52144362000/)

Is there a strong reason to select one option over the other? If I go with the top-hat style bushings, should I order a new K0 style pivot collar (Honda #52141300000) or the K6 type design?

[bryanj]

Use the top hat brass bushings with the early collar and original long bolt with new greasers fitted. The Honda ones are a push fit but unless you are a 100% originality nerd i think its ok to drill, tapand fit standard m6 zerks

[bryanj]

Forgot to say its common for the collar to wear more than the bushes and it aint cheap

[Kelly E]

My buddy found a kit for $100 that changes it to needle bearings with thrust bearing swingarm caps for the 74' 550K0. It came with two needle bearings, two thrust bearing caps and a new inner sleeve. It has zero resistance to movement. I think he got it from Dime City Cycle.

[BenelliSEI]

Use the top hat brass bushings with the early collar and original long bolt with new greasers fitted. The Honda ones are a push fit but unless you are a 100% originality nerd i think its ok to drill, tapand fit standard m6 zerks

+1 to this. I drill and tap the through bolt for proper grease fittings. If you are so inclined, drill the bottom of the chassis tube that holds the brake pedal pivot shaft, and install a grease fitting there to. Takes a bit of fiddling. Once the fitting is snug in the threaded hole (I usually give it a drop of loctite), then go inside and grind off the excess with a small Dremel stone. Pump a bit of grease through to clear any chips. Now you can grease the pedal anytime you do the swing arm.