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Replacing Swingarm Bearings Honda CB750 | New Swing Arm Bushings Guide | Project Bike | Part 21
In this Honda CB750K project bike episode, I replace the worn-out swingarm bushes on my CB750 project bike. I am building this bike to be a road-going runner, not a full restoration, but I could tell by the excessive play in the swinging arm that these bushings were worn out.
CB750K Bronze swingarm bushes: ebay.us/YregUw
Bearing drifts: ebay.us/EFSXqA
CB750 Swingarm grease nipple: ebay.us/fZ9WtN
Blue HP Grease: ebay.us/q4bM5s
When I replaced the wheel after getting new tyres I noticed that there was a lot of play in the swingarm. I was already concerned about the head bearings so it was a bit of a setback when I spotted this as well. I have not changed the bushes in a swingarm before so I wasn’t fully sure how I would do it.
Having done some research I found out that it was a known issue with CB750’s which seem to wear out their bearings. The Honda design seems quite good with a bush, a felt washer then a top hat style washer to keep dirt out. Earlier bikes have grease nipples at the end of the swingarm spindle, with later bikes having a grease nipple in the body of the swingarm.
The accepted change is to fit one piece per side bronze/brass bushes. These are easier to fit and a lot cheaper than the original parts.
Having stripped the swingarm out, I proceeded to drive the bushes out using a long steel drift. They do take some getting out, but the new bushes went in quite easily. Especially as I had put them in the freezer for a little while before fitting them.
I also noticed that the washers that go each side of the swingarm were missing, which were part of the problem, so I sourced new parts and fitted them.
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