<![CDATA[Do I have to split the cases again?]]>Most of the way through putting an engine back together that I stripped a while back and just found this part in a draw. Fairly sure it's a spacer for the rear lower engine to frame mount and that it is supposed to go between the two casings before they got put back together.

Just wondering if anyone can confirm that's what it is and that I do need to strip the engine apart again to fit it.

alt text

]]>https://dt125r.co.uk/topic/3427/do-i-have-to-split-the-cases-againRSS for NodeSun, 06 Sep 2026 12:05:42 GMTSat, 31 May 2025 10:55:07 GMT60<![CDATA[Reply to Do I have to split the cases again? on Mon, 02 Jun 2025 20:59:55 GMT]]>@Bilbo9000 Outstanding, I never thought of doing that! Well done Sir 👍

]]>https://dt125r.co.uk/post/32725https://dt125r.co.uk/post/32725Mon, 02 Jun 2025 20:59:55 GMT<![CDATA[Reply to Do I have to split the cases again? on Mon, 02 Jun 2025 19:56:37 GMT]]>Thanks for the replies. It definitely tested my vocabulary as soon as I found it as I was fairly sure that was where it was from and I had just assembled my cases. However I managed to avoid pulling them back apart in the end. I used a blind bearing puller and slide hammer to draw out one of the lower rear ending mount bushes. This allowed me to drop the spacer in from the outside and then refit the outer bushing.

]]>https://dt125r.co.uk/post/32724https://dt125r.co.uk/post/32724Mon, 02 Jun 2025 19:56:37 GMT<![CDATA[Reply to Do I have to split the cases again? on Sun, 01 Jun 2025 22:09:10 GMT]]>@Bilbo9000 Sorry to tell you what you really don't want to hear but that spacer fits between the cases and the lower rear engine mount bolt passes through it (items 5 and 6):

https://www.fowlersparts.co.uk/parts/4105067/dt125r-3rm5-1993-999-a/crankcase

Not sure what would happen if you leave this out; it has a rubber vibration damper either side of it (Yambits sell those or item 4) so I think this is to stop the inner parts of the vibration dampers being pulled towards one another when you tighten the bolt. It could potentially also pull the frame mount out of line as without the spacer present, there's nothing to stop you just tightening the bolt more and more. End of the day Yamaha put it there for a reason so I'd bite the bullet and get on and do it.

If you've just assembled your cases this will test your Anglo-Saxon vocabulary to its absolute limit (as it would mine) but you're not the first and won't be the last mate; archaeologists have found rectangular boulders of the same stone used to build Stonehenge (these were quarried in South Wales) at the bottom of the Bristol Channel so imagine how that guy felt...

]]>https://dt125r.co.uk/post/32723https://dt125r.co.uk/post/32723Sun, 01 Jun 2025 22:09:10 GMT<![CDATA[Reply to Do I have to split the cases again? on Sun, 01 Jun 2025 08:26:35 GMT]]>I must admit, I don't recognise that part.

Have you located it in the parts diagram?

]]>https://dt125r.co.uk/post/32722https://dt125r.co.uk/post/32722Sun, 01 Jun 2025 08:26:35 GMT