More great pictures!, Looks like a lot of fun.

Great pictures, thankyou.

Wow, that's cool. You have some big tools and know how to use them. By ceramic bore, do you mean nikasil? Is it a sleeve or a coating? Look forward to seeing more.

Good looking bike, what does it weigh? Do you do trials on it?

I've interpreted the lack of response to indicate that no one finds errors with the logic or math, but, as happens, my insecurities have led to intense introspection and the drilling of 2 additional shallow holes. :) Now the balance factor measures 0.644 which seems a reasonable approximation of the...

With the mainshaft true I could then balance the individual flywheels on the jig. With care it is sensitive to + or - 5 grams on the outside of the flywheel. The goal was to confirm that each flywheel originally had 3 or 4 balance holes drilled near the big end. Prior to filling the holes there had ...

Well... I've ignored all the free advice and gone ahead and attempted a repair of the mauled tapers. Sorry :) First I used bluing and lapping to get the taper as true as possible - no detectable runout. It's better than the undamaged taper. This required that the shoulder below the threads be cut ba...

JohnLay wrote: ↑Thu Mar 21, 2024 5:57 pm The little Ariel started and ran today. not for long as it's not fully back together yet.
But enough to be encouraged.

Congratulations!

You did see where I was able to get the runout down to 0.004" at the flywheel edge? Is that too much? That is with the nut at about 120ft/lbs. 0.004" is equivalent to the timing side wheel and approximately the roughness of the flywheel edge and the precision of my current fixture. The sha...

Thank you Paul. I do have a piece of 1" stock so may do that. Trying to get at the balance showed the drive side flywheel was too wobbly so forced to press that side apart. Should have expected... 20240315_113252.jpg The appeared to be a bit of shim in the keyway and the nut was distressed so p...