I need to replace the right hand crankcase on my second CT1-C as the original has a crack in the kickstart area and leaks transmission oil.
Am I right in thinking the CT3 case is the same other than using the larger 23mm outside diameter needle bearing (22mm on the CT1).
I have a spare CT3 bottom end that I can take the right hand case off, but I wanted to confirm compatibility before I split that engine.
Also, any thoughts on what might have caused the crack in the first place?
The bike is new to me, kicks over, runs and rides fine, I haven't investigated under the clutch cover yet.
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Both of the CT1 cases I have contain different support structure there (compared to yours) and yet another CT1 I saw has 5 beefed up supports, so Yamaha must have been dialed in to this as a potential concern. If kick error is a thing, then maybe people tend to over kick and push down, so it looks like they added support for that. Also, thats a long lever arm on the back rear mount.