OK Z, focus, focus on the mission.
1. The rear Diff screw got torn apart when I was using the front Spool. I change it to front diff balls and and new diff screw and all went alright. Maybe using a titanium high tensile diff screw should do the trick. I'll check and test this later.
2. For the 1st Speed oneway hub. It just happened once, I used another one that I had and haven't had problems anymore. But with the damage one what I did is to put some epoxy glue on the hub case later put the oneway bearing in it. Later need to make some tests.
Just make sure to remove any remain epoxy glue on the back of the oneway hub. Otherwise the transmission will react funny.
3. OK this is tricky one. Had to replace the inner pin from the layshaft pulley for a big and stronger pin. Where's there's no sing of this part anyplace from the manual of the R12. You just had to buy a whole new layshaft that cost you for about $30 for a broken pin and this part it's all gone, hard to find this sparepart. Well if you are one of those don't trash your layshaft here's the solution.
First, just remove the outer side fence of the pulley with a wrench. And take the pin out.
Here is the whole separate layshaft with and old and new pin. And a drill inside the hole of the pulley.
This is the drill
The drill from another view
These are the pins. If you see the left side it's the newer and stronger one. And right is the stock one. No wonder it broke so easy. Don't ask me what kind of materials and tools are. I just got it from a friends of friend of mine. Soo.. I'll ask him later what material and what tools are these.
Well you'll already know what to do. Just make a bigger hole with the drill on the pulley and on the outer side hole of the shaft, where the pulley it's connected. Then you later need to cut the bigger pin to match the size of the stock one so it can enters correctly on the pulley and the shaft.
Bigger and stronger pin inside the pulley and the shaft.
Put everything back in place and you're layshaft is reinforced and finished. No more broken pins.