Need Solid Bush!

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Kalim
Posts: 263
Joined: Tue Aug 14, 2007 2:14 pm
Location: France - Nantes

Re: Need Solid Bush!

#61 Post by Kalim » Tue Dec 06, 2016 6:25 am

My rebuilt project is moving a bit faster now, so I've been able to work on this swingarm joint issue.
I'd like to share it in case it can help anybody.

I've gone with the bronze self-lubricated bushings.
I purchased standard bushings Ø18 - Ø24 - l18, and got them machined to the right length so two of them have the same length as the original plastic thing.

And I pressed them in the relay arms (external is nicely sand blasted now :grin: ).
They fit great into the relay arm, but the inner diameter is now slightly too tight for the original collars.
I still have the room for the side seals.

Now I need to have two collars machined in pre-treated steel, to the same dimension as the original ones, except outer dia a very little reduced.

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rd84
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Re: Need Solid Bush!

#62 Post by rd84 » Wed Dec 07, 2016 7:03 pm

Nice work !

Cheers
Paul

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Kalim
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Location: France - Nantes

Re: Need Solid Bush!

#63 Post by Kalim » Tue Jan 03, 2017 12:56 pm

Here we go with the freshly machined collars.

Image

Can't wait to reassemble the swinger.

podman
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Re: Need Solid Bush!

#64 Post by podman » Tue Jan 03, 2017 1:57 pm

Great workmanship...

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Speed Freak
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Re: Need Solid Bush!

#65 Post by Speed Freak » Tue Jan 03, 2017 4:29 pm

Looks good :smt023

I still have not decided which bearings I will use... :smt017
At least I have a set of both sizes here and a set of 1mm shorter seals which are required when using the wider bearings.

Or maybe I will use one big and one small bearing.

Image

Material for the other modifications is also in my garage and is waiting for machining.
Doesn`t make sense to use needle bearings with the original collars/frame connection design.
My bikes:
RD500 YPVS 1GE
RD350 YPVS 31K 1985
Honda CBR 1000 RR SC57
Yamaha R1 RN04

Rufus
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Location: RSA

Re: Need Solid Bush!

#66 Post by Rufus » Sun Feb 12, 2017 3:17 am

Hey Kalim

Reviving your old thread....would you mind advising what material you used for the collars, the ones you refer to as pre treated ?

Thanks

Shane

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Kalim
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Location: France - Nantes

Need Solid Bush!

#67 Post by Kalim » Sun Feb 12, 2017 9:12 am

Hej, I used 110kg pre-treated, so I could use it directly out from the lathe, no need to send for heat treatment. And it has about the same hardness as the original bush. It is a bit harder than required by the bronze collar manufacturer.

Steel grade is 40CMD8, but there are probably many other that will fit.

Rufus
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Re: Need Solid Bush!

#68 Post by Rufus » Sun Feb 12, 2017 9:28 am

Thanks Kalim

Will sniff around for a local source

V4 Heaven
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Location: Wiltshire, UK

Re: Need Solid Bush!

#69 Post by V4 Heaven » Wed Jul 19, 2017 4:45 am

Just to let you know, I sent my relay arms off to MCT Suspension in Suffolk (UK). They had a company make up some replica relay arm bushes in a more modern plastic/nylon, and they even replicated the channel for the grease/grease nipple so that they can be lubed up for routine servicing. Since I've refitted them, the relay arms are spot on with no play.

I advised MCT that they may have a few more inquiries so if you want to call them, just mention RD500 relay arm plastic bushes and they can sort it for you.

http://www.mctsuspension.com/Contaceus.html" onclick="window.open(this.href);return false;

Cheers.
Gettin' kinda squirrely!

2manyprjx
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Re: Need Solid Bush!

#70 Post by 2manyprjx » Sun Aug 06, 2017 5:16 am

Just like everyone else, I had one cracked collar and quite a bit of wear. What I did was quick, easy, and inexpensive. I bought a piece of .750" round 01 steel that is only slightly larger than the original collar. Then I reamed out the original plastic bushes to .750". Next, I machined new collars out of the 01. The ends have to turned down to the original diameter where the seals ride. The 01 can be hardened easily if desired. I did all this within a couple of hours. The only downside to this is you will have to put the collar in the relay arm before the last seal goes in.
RZ500
RZ350
SRX600
NT650 Hawk
VFR400R NC30
NS400R
CBR400RR
CBR250RR
DUC 916
Derbi GPR50 w/CR125 engine

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Speed Freak
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Re: Need Solid Bush!

#71 Post by Speed Freak » Sun Aug 06, 2017 6:19 am

Parts for this project are growing on my desk over time.

Image

Open tasks:
- New paint for the relay arms
- Pressing in the bearings
- Machining of the collars
- Remachining/reaming the frame bores to get them round and to a specified dieameter
- Machining of the new frame bushings
- Nickel plating of all parts which are not made out of stainless steel.
My bikes:
RD500 YPVS 1GE
RD350 YPVS 31K 1985
Honda CBR 1000 RR SC57
Yamaha R1 RN04

Bengt Weil
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Location: Ventura, California

Re: Need Solid Bush!

#72 Post by Bengt Weil » Thu Apr 11, 2019 12:52 am

Reviving this thread as I am getting back to reassembling my linkage and need to address the plastic bearings and worn bushing in the relay arms. Did anyone end up making or finding the necessary parts to replace the OEM NLA parts for the relay arms? I would rather not reinvent the wheel if a solution exists... Thanks!

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Speed Freak
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Re: Need Solid Bush!

#73 Post by Speed Freak » Thu Apr 11, 2019 1:12 am

Parts an desk moved 100km, but nothing else happened...
I have all drawings and the design ready but the priority of this project is low.
My bikes:
RD500 YPVS 1GE
RD350 YPVS 31K 1985
Honda CBR 1000 RR SC57
Yamaha R1 RN04

V4 Heaven
Posts: 182
Joined: Mon Nov 28, 2011 6:43 pm
Location: Wiltshire, UK

Re: Need Solid Bush!

#74 Post by V4 Heaven » Thu Apr 11, 2019 2:12 am

My solution via MCT suspension remains as my preferred route for the plastic bushings.
Gettin' kinda squirrely!

Bengt Weil
Posts: 224
Joined: Sat Aug 04, 2012 2:01 am
Location: Ventura, California

Re: Need Solid Bush!

#75 Post by Bengt Weil » Fri Apr 12, 2019 12:43 am

Parts an desk moved 100km, but nothing else happened...
I have all drawings and the design ready but the priority of this project is low.
Hopefully we can get some additional interest generated...!

My solution via MCT suspension remains as my preferred route for the plastic bushings.
I am assuming the MCT only addresses the plastic bushings, supplying ready to install bushings they have manufactured. Do they also do the steel collars? Mine are fairly worn and I would hate to put them into new plastic bushings, though they are not cracked. Any chance of getting an email contact for MCT?

Thanks to all interested in the solution to this problem.

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