78 YZ250E Shock/Swingarm bushings

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8/18/2017 11:00 AM

I have more play than I would like in the lower shock bushing/upper swingarm bushing.
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The lower shock and upper swingarm bushings seem worn. There is too much play. The bolt is in good condition. The bushings dont seem to be a replaceable Yamaha part? Does anyone sell bushings? or rebuild the shock and swingarm bushings? I've cleaned them up and lubed them with waterproof grease, for now...get a bit of a 'clunk' when I jump the bike...

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8/18/2017 12:30 PM

I have an NOS shock bushing from a 79 full size YZ... Check part #"s & see if they are the same, I paid 50.00, will sell for 25.00 plus shipping. Photo

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8/18/2017 12:36 PM

I see they have the swing arm pivot kit available here. Might call and see if they have a fix for the upper.


http://www.x-tremevintageyz.com/products#!/All-Balls-Swing-Arm-Bearings-kits/p/20566201/category=4784701

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8/18/2017 12:37 PM

Or just get the bushing above...smile

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8/18/2017 1:34 PM

wow...great! thx guys!

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8/18/2017 1:38 PM
Edited Date/Time: 8/18/2017 1:40 PM

newmann wrote:

I see they have the swing arm pivot kit available here. Might call and see if they have a fix for the upper.


http://www.x-tremevintageyz.com/products#!/All-Balls-Swing-Arm-Bearings-kits/p/20566201/category=4784701

Thx...my swingarm pivot bearings and collars are good...The worn bushings are in the upper swingarm where the bottom of the shock attaches/ pivots...I can see a bushing in there...but doesn't show up on parts list...
I'll call as you suggest...

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8/18/2017 2:13 PM

sandman768 wrote:

I have an NOS shock bushing from a 79 full size YZ... Check part #"s & see if they are the same, I paid 50.00, will sell for 25.00 plus shipping. Photo

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Ahh...I tried to correlate the '79 lower shock bushing number, but I can't. The '78 parts diagrams do not show it as a replaceable part. The '79 parts diagram shows the replaceable part....but it looks a bit different, to me.
I'm no expert...the '78 and '79 lower shock bushings look different to me in that photo.?
Maybe...the answer is to use a '79 shock in the '78 chasis so it is rebuildable? Does a '79 shock fit in a '78?Photo

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8/18/2017 2:35 PM
Edited Date/Time: 8/18/2017 2:38 PM

I'm sure someone on here knows the answer to the 78-79 shock upgrade, I am not sure...my vast knowledge of useless vintage information is limited to Suzuki"s. Mine may be the upper bearing, I bought both for my 79 yz400 & only replaced 1 of them, I remember I had to visit a friend to use his press to replace it, I thought the shock was going to break, it came out so hard....if it is a serviceable part try Speed & Sport Yamaha in PA, that is where I got all my NOS YZ parts

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8/18/2017 3:05 PM
Edited Date/Time: 8/18/2017 3:06 PM

Thx...I'll be patient...I can't be the first with this question and this forum group seems very experienced.
It looks like the same issue with that upper swingarm bushing...it shows up as a replaceable part #38 in the '79 swingarm diagram (bottom), but is not shown in the '78 diagram. So, again, if the bushings are the same...then I can rebuild a '78 upper swingarm with '79 bushings....or I have to get a '79 swingarm to have it rebuildable if its compatible with a '78 chassis...? Kinda the same questions.Photo

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8/19/2017 10:42 AM

My guess is that the 78 and 79 suspension parts are different dimensions. The 77 and 78 would interchange

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