<![CDATA[Replacing gear selector bearing]]>Hi guys, has anyone changed the sealed bearing that sits behind the gear selectors 'star'? Does the weld need removing?
Many thanks

]]>https://dt125r.co.uk/topic/1537/replacing-gear-selector-bearingRSS for NodeSun, 15 Mar 2026 02:35:55 GMTTue, 03 Jul 2018 13:41:28 GMT60<![CDATA[Reply to Replacing gear selector bearing on Wed, 04 Jul 2018 06:29:32 GMT]]>@louis-james I take it this selector drum is different to the 125 drum.

]]>https://dt125r.co.uk/post/16467https://dt125r.co.uk/post/16467Wed, 04 Jul 2018 06:29:32 GMT<![CDATA[Reply to Replacing gear selector bearing on Tue, 03 Jul 2018 22:55:36 GMT]]>@calum not really, this "running" engine I bought has water in cases and rusted the bearings, even though this is a sealed bearing, water does get in eventually. Also so many bolts, washers and nuts were missing or incorrect size. Found a whole base gasket in the clutch cover ! Oil pump was siezed but managed to salvage the casings and a few other bits. New final drive shaft was needed so ordered one. I'll get some pictures up when cases are bored and ported then hard anodised.

]]>https://dt125r.co.uk/post/16462https://dt125r.co.uk/post/16462Tue, 03 Jul 2018 22:55:36 GMT<![CDATA[Reply to Replacing gear selector bearing on Tue, 03 Jul 2018 21:15:09 GMT]]>@louis-james Has your bearing failed? I'd just get another one, given that you can get them for less than a 10er.

I'm not sold on the welding idea personally.

]]>https://dt125r.co.uk/post/16461https://dt125r.co.uk/post/16461Tue, 03 Jul 2018 21:15:09 GMT<![CDATA[Reply to Replacing gear selector bearing on Tue, 03 Jul 2018 18:54:53 GMT]]>@calum that's what I thought, might out it in a lathe to take weld off then press bearing off and reweld after new one is installed

]]>https://dt125r.co.uk/post/16459https://dt125r.co.uk/post/16459Tue, 03 Jul 2018 18:54:53 GMT<![CDATA[Reply to Replacing gear selector bearing on Tue, 03 Jul 2018 18:52:51 GMT]]>All coming back to me now.

Mate, honestly there is no load on that bearing it shouldn't wear. I only replaced mine cause the connecting rod shot through the case and the bearing was rough. But the bearing travels less than 360 degrees in any direction. But it doesn't look serviceable.

]]>https://dt125r.co.uk/post/16458https://dt125r.co.uk/post/16458Tue, 03 Jul 2018 18:52:51 GMT<![CDATA[Reply to Replacing gear selector bearing on Tue, 03 Jul 2018 18:26:30 GMT]]>alt text
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I've ordered all new transmission bearings from a local company but I didn't order this one as can't remove it.

]]>https://dt125r.co.uk/post/16457https://dt125r.co.uk/post/16457Tue, 03 Jul 2018 18:26:30 GMT<![CDATA[Reply to Replacing gear selector bearing on Tue, 03 Jul 2018 17:51:13 GMT]]>@louis-james Oh yeah, you sure it's not journal bearing?

]]>https://dt125r.co.uk/post/16455https://dt125r.co.uk/post/16455Tue, 03 Jul 2018 17:51:13 GMT<![CDATA[Reply to Replacing gear selector bearing on Tue, 03 Jul 2018 17:42:56 GMT]]>It's listed as one part, very stupid design if it can't be removed separately.
Reason is I'm building a spare 200cc engine with my new 3xp cylinder

]]>https://dt125r.co.uk/post/16454https://dt125r.co.uk/post/16454Tue, 03 Jul 2018 17:42:56 GMT<![CDATA[Reply to Replacing gear selector bearing on Tue, 03 Jul 2018 15:48:22 GMT]]>@louis-james Just the Aprilia. What does the exploading diagram say?

]]>https://dt125r.co.uk/post/16452https://dt125r.co.uk/post/16452Tue, 03 Jul 2018 15:48:22 GMT<![CDATA[Reply to Replacing gear selector bearing on Tue, 03 Jul 2018 15:19:53 GMT]]>@calum thanks mate, I'll give that a try when I'm back in the UK. As far as I can remember the selector is a solid item. Have you changed one on the DT? Or just the aprillia?

]]>https://dt125r.co.uk/post/16451https://dt125r.co.uk/post/16451Tue, 03 Jul 2018 15:19:53 GMT<![CDATA[Reply to Replacing gear selector bearing on Tue, 03 Jul 2018 13:49:49 GMT]]>https://dt125r.co.uk/topic/1358/aprilia-rs-125-selector-drum-rebuild-rotax-122

]]>https://dt125r.co.uk/post/16449https://dt125r.co.uk/post/16449Tue, 03 Jul 2018 13:49:49 GMT