SOHC.co.uk Forums > CB500/550

Stuck dowel pins in transmission

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alexdecker:
Yeah, I think its time to get a hold of something a little better than WD40.

The one I can see is sitting in the bearing spot for one of the transmission cog shafts. I am almost sure I would nick it, if I tried to do anything to it. The other one is not accessible at all, as it is deeply recessed into the selector fork.

This actually brings up another question for me. I took out the transmission without taking it apart, and also the primary drive, without taking anything of the shaft. Is there anything wrong in cleaning the internals of the engine even though I don't split it up into single parts? I.e. can I just clean the transmission as the two big pieces it is right now? Or do you guys recommend it and other parts staying oily when going back in to the case? In that case, I would only clean the outside and inside of the actual engine case…

Also, all my bearings seems to be in good order. No nicks, smooth glide and all. How do you guys usually clean them up?

alexdecker:

--- Quote from: sye on February 11, 2022, 01:15:44 PM ---Heat the casing gently below the pin. As the oil expands it will push the pin out.

--- End quote ---

Going to try that right now.

alexdecker:
Okay, heating worked for the one bearing to the right. Now I just need good (like really good) advice on the one holding the selector fork in place…

McCabe-Thiele (Ted):
On my 400 I  was reluctant at first to dismantle my transmission. I took plenty of photographs before I removed the two gearshafts placing them as complete assemblies into clear zip lock bags. I decided I needed to remove some surface rust that was present on some none gear surface parts so dismantled one shaft almost completely. Lots of photos plus some written notes were used together with my workshop manual & the parts manual for rebuild. Cleaning the empty casings  & painting them was much easier with gears etc removed. When I was unsure about some details when putting the engine together I sought help here. I had not dismantled a motorcycle engine in over 50 years I am now much more confident in my rebuild thanks to advice from here. Plus of course the wealth of U Tube videos that I used as tutorials.

McCabe-Thiele (Ted):

--- Quote from: alexdecker on February 11, 2022, 01:30:53 PM ---Okay, heating worked for the one bearing to the right. Now I just need good (like really good) advice on the one holding the selector fork in place…

--- End quote ---
My first  thought would be to remove the whole selector shaft if that's possible for easier access?

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