Honda-SOHC
SOHC.co.uk Forums => CB750 => Topic started by: onethumb on December 24, 2015, 08:25:15 PM
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Hi all, only me again,
I've just cleaned my rear swingarm ready for powder coating and I know one of the bushes needs replacing so was going to do both but I've just seen that I'm missing the pivot thrust bush (don't remember removing it) and one of the rear fork felt rings is in a bad way, can anyone tell me where I can get these parts and any tips on removing the old ones.
thanks, Steve
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Replace both bushes and felts along with the pivot pin that wears more than the bushes, all Parts were available from Dave Silver but the pin is expensive. To get the bushes out use a padsaw or just a hacksaw blade to cut down the length and collape them inwards
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Cheers bryanj, the pin looks in good nick, am I wrong to try it in the new bushes?
Also have you a link for the felt and the pivot thrust bushes, can't see them anywhere?
Thanks.
This is a top site. I'm loving the help.
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Should be able to find them from the part number. Which model CB750 have you got?
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bush 52108-300-300
thrust 52109-283-300
felt 52145-283-000
pivot 52141-300-300
cap 52144-283-010
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I've just replaced the swing arm bushes and pivot pin on the CB750. I did try new bushes without renewing the pin at first, however it was a complete waste of time and effort. After fitting the new pin, all is as it should be again.
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bush 52108-300-300
thrust 52109-283-300
felt 52145-283-000
pivot 52141-300-300
cap 52144-283-010
Now that's top service. Nice one Bryan.
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Well if it has the thrusts it has to be the same as the 500 and I have oodles of books for those!!!
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bush 52108-300-300
thrust 52109-283-300
felt 52145-283-000
pivot 52141-300-300
cap 52144-283-010
Now that's top service. Nice one Bryan.
I second that.
Sorry should of said, I've got a 1978 cb750 f2.
Thanks for the heads up flatfour too many of the good people on here have said change the pin so stuff the budget and do it right.
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If its an F2 it should not have seperate thrusts and all those numbers are wrong -- sorry
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Thanks bryanj that's why I don't remember talking them off.
New numbers?
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BUSH RR FORK PIVOT 52108-457-300 (X2)
COLLAR, RR. FORK CENTRE 52141-390-000 (1)
CAP RR. FORK DUST SEAL 52144-362-000 (X2)
(http://i192.photobucket.com/albums/z244/DennisMcc/SWINGING%20ARM_zpsopfe5zok.jpg)
Cheers
Dennis
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Thanks Dennis. No hiding place now.
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I think you will find the collar unobtainable but i believe the earlier one has the same dimensions just different grease grooves
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You also have the option of a needle roller upgrade from Wemoto. http://www.wemoto.com/bikes/honda/cb_750_f2_sohc/78/picture/swinging_arm_pivot_bearing_kit/
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You also have the option of a needle roller upgrade from Wemoto. http://www.wemoto.com/bikes/honda/cb_750_f2_sohc/78/picture/swinging_arm_pivot_bearing_kit/
Now that is nice to know.
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Hi all, Sorry to bring this back but tried tonight to remove the bushes, but I'm pretty certain their not bronze they are more like steel. I've a 1978 cb750f2 is this possible?
Thanks steve.
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That's correct. The bushes in my F2 were steel as well. There's various ways of removing them on the internet using all kinds of special pullers. I cut through them with a hacksaw blade in a handle the collapsed them inwards and pulled them out. A real tedious job to do. Good luck with it.
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Thanks for the reply Roy, how did you manage not to damage the collar in between the two bushes, and how long did it take you?
Steve.
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The bushes fitted to yours should really have stopped at the K6 model, with the F1&2 and Auto models fitted with the newer bushes that are way easier to get out. But like yours my F2 was fitted with the earlier type, I'm assuming they were a replacement by a previous owner. If you order bushes from Silvers website they also send you the older type, hence my saying I think they were a refit.
I did do some slight damage to the centre piece in the swingarm but it does not affect the way it works. It took absolutely hours to cut through the bush enough to get it out. I carefully used a jigsaw to get the job going, then cut right through with a hacksaw blade. You cant get right through all along the entire length, but enough to loosen the bush. I then knocked it out with a long steel bar with a straight cut end. There's just enough showing of the bush to hit it.
Getting the pair out took an entire weekend with a lot of swearing etc. I also had a very sore hand afterwards. There are a few write ups ont tinternet about making special pullers and other ideas, I will be going down that route next time as my way was a really tedious hard slog.
Try sending a PM to BryanJ or Trigger, I'm sure they will know an easier way to do this.
Cheers Roy.
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You should take everything out of the swing arm so, you are just left with the bushes. Used a good hacksaw blade and cut a line down the bush, cut another line about 5 to 10mm next to the first and the bush should fold on its self to get it out. Did post some pics for MR T on how to do this.
For new bushes get on to frank, link >>> http://www.ebay.co.uk/itm/Honda-CB-500-550-750-900-Four-Schwingenlager-Bronzebuchsen-Swingarm-Bushings-/360953538938
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Did that work for the steel type bushes Graham as mine were a real bitch to get out. The bronze type I did later were really easy to do?
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Can get the metal buses out in ten minutes this was ;) Bronze buses 5 minutes ;) Plastic buses 2 minutes ;)
I do have ready brek for breakfast ;D ;D ;D
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Arms like Popeye and hands like mole grips helps ;D ;D ;D ;D I'm sure I have seen a reciprocating saw in his workshop though ::) ::) ::)
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How to link http://www.sohc.co.uk/index.php/topic,7574.msg46740.html#msg46740
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Told you trigger would have a better way.
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Thanks trigger, Roy, Julie
Already got the bushes from frank after reading the chat about this. I'm going to try a few methods and hopefully give help to others like I've had. Going to learn some new swear words for the attempt over the weekend.
Wish me luck l'm going in.
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Julie's comment about the reciprocating saw is probably the big clue. Good luck and I hope you don't end up being called no thumbs. LOL.
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LOL it was a motorcycle chain that took the other one.
Kids!! don't clean motorcycle chains with the engine running on a paddock stand while in first gear. Did it like that for years, only takes one mistake.
Still loved that ZX6R though
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Julie's comment about the reciprocating saw is probably the big clue. Good luck and I hope you don't end up being called no thumbs. LOL.
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The first clue was right Roy, don't own a reciprocating saw ;)
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I've used for things like this a SDS hammer drill on which you can stop the rotary action, used on old drill bit the tip had worn out and grind the end square or some profile you can get to engage the inside edge of the bearing and it'll take most things out that are hard to get any healthy hammer blow to.
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I like that idea nigel
pete
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Yay Pete, I kinda stumbled into that one.
Friend came round with a bit of his car suspension with a long bolt well and truly stuck inside forged alloy, everybody had already had a go with hammers, heating it, tried to drill out and finally snapped a hardened pin punch inside it! So we tried anything I'd got and we ended up deciding it was probably scrap. He'd packed it away and we were sitting round talking about other stuff when I thought about using the hammer drill which got it out. We were dancing round like a couple of idiots at our success, I was wondering why I'd never made the connection before.
Maybe I should put it over on hints and tips to make it more visible as it's worked on anything I've found a need since, if you turned up various drift sizes and weld them to old SDS bits you can knock anything out much easier than using a hammer. Last used to get a washing machine drum bearing out for a neighbour which was so tight it was ringing like big Ben.
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Hi all. Thanks for the tips along the way. Going to try and give something back with some pics. Did it this evening. (http://uploads.tapatalk-cdn.com/20160215/14143c25314c0773a1bfca4b8db9b5cf.jpg)(http://uploads.tapatalk-cdn.com/20160215/b917eba0e02432a1fef7f6c3a6e26d2a.jpg)(http://uploads.tapatalk-cdn.com/20160215/2437727df1fe7ad8f0731a375f4de41f.jpg)
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That sounds like a good wheeze. The next time I'm stuck, I'll try the SDS method.
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Thtas the newer style unobtainable collar but you can fit the earlier one
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Thanks bryanj that's good to know.