Calculator,Measure,lap,measure.lap.measure,lap,measure,lap, calculators again.
Now ready for balancing..

Wait,, haven't done piston pin bushing yet,, I guess tomorrow..


KNO

Leaky stock pet cock sucks

This early stock style pet cock was constantly seeping gas..changed brass washer, but didn't work.
I took tank of the bike, to pressure test to find crack somewhere .

Then find this , nicks on washer surface.. Several of them.. Urgh.




Now I have re-surface washer surface. But it needs to be square to the threaded bore in order to seal good.
So I asked my head mechanic for advice.


She was busy , so I had to come up with my own strategy,,sipped coffee in pot I made in the morning tasted nasty , so I popped open nastier cheap beer,,making a note to myself , get tasty Asahi beer next time.

After Few scratching head moments

So I took beat-up used stock pet cock seat which goes in that bore,, machined it , leaving its shoulder just enough so that this piece would jam up not to spin.


Then I made a slot do I can turn it in&out with rachet & flat tip socket .



Forgot to mention, i found this Petcock rod seat Assy has sleeve inside, which was perfect slip fit for 5/16 pilot for valve guide cutter



Chuck the little fucker in drill, slip it in and cut the surface with light pressure,



It came out pretty good for improvised jam session.


Wondering if there's tool for this,,


Note
Not recommended for high end period correct restoration for restoration competition. Your bike may disqualify because screw-in pet cock rod may sits 0.02 inch or higher at closed position due to this cutting surgery.

NOS

Some people likes New Old Stock parts.
I don't think that "NOS is the best " applies to everything. At least not all the time..
If its 60 years old, it is 60 years old ,,



KNO

Seized thread-in seal..

First-off , not smart design to begin with..this one was Seized. Tried welded nut to turn but it wouldn't budge.i carefully cut it out leaving enough to work with


Then I set in on mill, center it based on bearing race.



Boring out steel seal housing by small increments.. Till they are thin enough to tap it out.




Its Finally out, threads are still good.. So much for change one seal,, might as well rebuild the whole thing?

Tool geek

Valve spring tester