Author Topic: Sideways play in swing arm.  (Read 1713 times)

Online SteveW

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Sideways play in swing arm.
« on: August 19, 2020, 03:47:33 PM »
Got a small amount of sideways movement in my swing arm.

Do I just need new bushes or is there anything else I need as well?

And is it just drift old bushes out and fit new ones?

Thanks.
1974 CB550 K0
1980 CB650
2000 CBR929RR Fireblade
1966 Lambretta LI150 Series 3
1981 RD350LC
1972 Raleigh Chopper
1974 Raleigh Tomahawk
2011 Henry Hoover

Offline AshimotoK0

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Re: Sideways play in swing arm.
« Reply #1 on: August 19, 2020, 04:14:33 PM »
Got a small amount of sideways movement in my swing arm.

Do I just need new bushes or is there anything else I need as well?

And is it just drift old bushes out and fit new ones?

Thanks.

In my experience the collar wears too even though you would expect the bushes to wear in preference. Collars are very expensive. Some bushes are plastic some are steel depending on model. Trigger/Julie  sells repro bronze ones I think.
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Offline MrDavo

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Re: Sideways play in swing arm.
« Reply #2 on: August 19, 2020, 04:21:16 PM »
If its just sideways play and not twisty play, then surely the right size thin washer, if you could find it, could fix it?

I guess to keep chain line problems at bay, a thinner one either side of the swinging arm would be even better.

Just a thought, a real engineer will be along soon to tell me I'm being stupid.
1969 Honda CL450 'Scrambler'
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Offline AshimotoK0

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Re: Sideways play in swing arm.
« Reply #3 on: August 19, 2020, 05:31:44 PM »
I think your bike is a 550K0 yea? If it is the original setup  will have the phenolic plastic bushes at the end ... a carry over from the CB450 then 750 design. These may be damaged/worn if it is just sideways play. The aftermarket bronze ones does away with these as they are a top hat shape.
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Bryanj

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Re: Sideways play in swing arm.
« Reply #4 on: August 19, 2020, 05:41:43 PM »
Originally there is a bush, felt ring,plastic thrust and steel cup washer all held in by tightening the through bolt.
If everything is there try tightening the nut on through bolt which needs to be very tight.
If the bushes are worn you WILL need a new collar (about $100) if you fit the top hat brass you wont need the felt or plastic thrust but you do need the steel cup washer

Online SteveW

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Re: Sideways play in swing arm.
« Reply #5 on: August 19, 2020, 08:30:39 PM »
Mine is a 74 550. So if I have the plastic bushes does that mean I may not have to change the collar?

I’ll try tightening everything up tomorrow first to see if that helps.
1974 CB550 K0
1980 CB650
2000 CBR929RR Fireblade
1966 Lambretta LI150 Series 3
1981 RD350LC
1972 Raleigh Chopper
1974 Raleigh Tomahawk
2011 Henry Hoover

Offline Bryanj

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Re: Sideways play in swing arm.
« Reply #6 on: August 19, 2020, 09:16:25 PM »
No mate, the plastic bushes wear the collar just as much as the metal ones and are even more of a swine to get out, big problem is people dont grease the pin enough, i recon maximum 1500 miles or if its raining when you get home every time

Online SteveW

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Re: Sideways play in swing arm.
« Reply #7 on: August 19, 2020, 09:21:17 PM »
No mate, the plastic bushes wear the collar just as much as the metal ones and are even more of a swine to get out, big problem is people dont grease the pin enough, i recon maximum 1500 miles or if its raining when you get home every time

Thanks Bryan, I’ll check tomorrow and see if I can get away with tightening for now.
1974 CB550 K0
1980 CB650
2000 CBR929RR Fireblade
1966 Lambretta LI150 Series 3
1981 RD350LC
1972 Raleigh Chopper
1974 Raleigh Tomahawk
2011 Henry Hoover

Online SteveW

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Re: Sideways play in swing arm.
« Reply #8 on: August 20, 2020, 05:12:54 PM »
I’ve just undone the through bolt.
All there was a steel washer under the head of the bolt and a steel nut and washer the other end.
I’m guessing I may have parts missing?

The bolt is in good condition at least, I have not tried to get the bushes out.
1974 CB550 K0
1980 CB650
2000 CBR929RR Fireblade
1966 Lambretta LI150 Series 3
1981 RD350LC
1972 Raleigh Chopper
1974 Raleigh Tomahawk
2011 Henry Hoover

Offline Bryanj

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Re: Sideways play in swing arm.
« Reply #9 on: August 20, 2020, 05:43:42 PM »
From memory there was no washer, have a look at the parts diagram at cmsnl 500 and 550 are same.
The nut is, or should be, a locking nut

Online SteveW

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Re: Sideways play in swing arm.
« Reply #10 on: August 20, 2020, 06:43:23 PM »
The nut is a lock nut.

How tight can I do the through bolt up?
1974 CB550 K0
1980 CB650
2000 CBR929RR Fireblade
1966 Lambretta LI150 Series 3
1981 RD350LC
1972 Raleigh Chopper
1974 Raleigh Tomahawk
2011 Henry Hoover

Offline Bryanj

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Re: Sideways play in swing arm.
« Reply #11 on: August 21, 2020, 01:33:48 AM »
Very, the frame will squeeze in and trap the washers and collar before the bolt breaks, as long as all the correct parts are in there

Offline Trigger

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Re: Sideways play in swing arm.
« Reply #12 on: August 21, 2020, 09:33:56 AM »
A 74 550 can be either a 550K0 or a 550F1 and they both have different swinging arms with different bushing systems.

Has the petrol tank got a flap covering the cap or is the cap an exposed chrome one?

NO 550F1 in 1974 Ken  ;)

A 1974 550 should have the same set up as a CB500 four, same frame and swing arm.
« Last Edit: August 21, 2020, 09:38:37 AM by Trigger »

Online SteveW

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Re: Sideways play in swing arm.
« Reply #13 on: August 21, 2020, 03:15:09 PM »
Exposed fuel cap
1974 CB550 K0
1980 CB650
2000 CBR929RR Fireblade
1966 Lambretta LI150 Series 3
1981 RD350LC
1972 Raleigh Chopper
1974 Raleigh Tomahawk
2011 Henry Hoover

Online SteveW

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Re: Sideways play in swing arm.
« Reply #14 on: August 21, 2020, 09:51:25 PM »
On my vin plate it’s says built Nov 73
1974 CB550 K0
1980 CB650
2000 CBR929RR Fireblade
1966 Lambretta LI150 Series 3
1981 RD350LC
1972 Raleigh Chopper
1974 Raleigh Tomahawk
2011 Henry Hoover

 

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