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Author Topic: Mystery Spacer  (Read 193 times)

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Offline Johnny

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Mystery Spacer
« on: January 13, 2018, 08:50:20 PM »
Evening everyone,

Been assembling the bottom end on my RD250 and found myself a piece I didn't recognize in the parts pile. Appears to be a spacer of some sort though I am not sure where it belongs. Pretty much have the whole bike apart at this point, though I tried to keep things organized. None the less, here I am. Used a wrist pin bearing for scale. Any thoughts?


Offline Stankflapper

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Re: Mystery Spacer
« Reply #1 on: January 13, 2018, 10:53:19 PM »
Engine mount spacer??
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Offline m in sc

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Re: Mystery Spacer
« Reply #2 on: January 13, 2018, 10:54:58 PM »
green coating is usually a later bike. im pretty sure it doesnt belong on an 73-75 rd250.
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Offline jrotten99

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Re: Mystery Spacer
« Reply #3 on: January 14, 2018, 01:24:51 AM »
Engine mount spacer??
Thatís what it looks like to me.

Offline Yamaha179

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Re: Mystery Spacer
« Reply #4 on: January 14, 2018, 05:06:46 AM »
There is no engine mount spacer on a RD so I don't see it being that.  There are some expansion chamber mounts that have rubber vibration isolation sleeves that use steel inserts for the mounting bolts.  Looks about the correct size.  Wouldn't be in the bottom end though.
Lyn Garland

Offline jrotten99

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Re: Mystery Spacer
« Reply #5 on: January 14, 2018, 06:12:07 AM »
There is a spacer on rear lower mount. That one posted may be too short but a spacer is there. 

Online jspooner

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Re: Mystery Spacer
« Reply #6 on: January 14, 2018, 08:42:31 AM »
green coating is usually a later bike. im pretty sure it doesnt belong on an 73-75 rd250.

I agree with Mark, there's nothing on an RD250/350 that would be that color of coating.
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Offline teazer

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Re: Mystery Spacer
« Reply #7 on: January 14, 2018, 09:48:36 AM »
It looks like a sleeve from a rear suspension unit - new one at that.

Offline jetta90

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Re: Mystery Spacer
« Reply #8 on: January 14, 2018, 10:10:58 AM »
On the ongoing 73 RD250 project I have....there is nothing I recall that looks like the spacer you're trying to find a home for.  I stripped down the motor and motorcycle completely and can say there is nothing similar.
As jrotten99 mentioned, there is a spacer at the bottom right side rear motor mount that looks similar, but the length is all wrong.  Just took a look at my RD250 motor mounted in the frame and that spacer is approx 2.75" long.
Lyn Garland makes a good point about expansion chamber sleeves though.  I vaguely recall installing J & R expansion chambers on a 74 RD350 I had almost 40 years ago.  I think there was a spacer that came with the chambers that was used between the rear eye mount on the pipe and the rear footpeg mount on the bike.  Maybe? 

Offline Johnny

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Re: Mystery Spacer
« Reply #9 on: January 14, 2018, 10:35:13 AM »
Thanks everyone, just making sure that this wasn't something important that I was missing. Have everything assembled on the bottom end, will be putting it in the bike today. The project marches on!

Johnny