SOHC.co.uk Forums > CB500/550

Swing Arm Bushes

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florence:
The last time I had the swing arm off was in 1995 when I rebuilt the bike, and I can't remember whether I replaced the bushes at that time or whether they were still good.  I don't think I did so very likely they are still the original ones.  I have greased them fairly regularly.  In terms of torque on the bolt, that's a good shout, it could have loosened in the last 30 years.  Is there a proper setting?

deltarider:
Florence, what model is yours?

Murf:
The book I have (Haynes)gives 39 to 50 ft-lb,   So say 42 ft-lb    The thing is, after tightening the SA must be able to move up and down freely, it is possible on some bikes to bend the frame inwards with over tightening and jam the SA.

Cmsnl have the collars if you need one, try not to,  they are expensive as said.

Murf:
Just thought, frame won’t bend on 550 as it is tightened against the ends of the collar.

Oddjob:
Florence has a CB500k so the bushes will be steel not plastic.

The collar on the 500 is also different from the one fitted to the 550 due to the different positioning of the grease nipples. The 500 has them on the end of the SA bolt, the 550 has it positioned centrally on the underside of the SA. Hard to find a collar for the 500 these days, you can tell the difference between the 500 and 550 by the drilling’s in the spiral grooves, the 500 has them, the 550 doesn’t.

You could try and find a needle bearing conversion for the SA, but be aware they are not suitable for the 500 SA unless you alter the greasing arrangement.

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