Pretty much anything not covered by the topics above. Short lived production bikes or vehicles, Electrical, Tires, Paint, Brakes, etc. Use this for tech questions, and "Shoot the Bull" for general conversation, no tech.
Back to fitting that critical pinion bushing:
Like Alex wrote, getting a sweet fit on a pre-cut bushing sometimes is more art than science. After fudging piloted reamers and even attempting to run piloting shoes on my Sunnen to do it through the right case, I have returned to a slightly undersized piloted reamer. After crosshatching this undersized bore with an Adalox (abrasive nylon) brush, I can try the shaft for fit. The 'high' marks left after a trial are then easily scraped with a $1.85 triangular machinist scraper, and re-finished with the Adalox again. It might take the patience of three or four touch ups, but this gives the maximum bearing surface at a minimum clearance. And I can do it to an assembled lower end. How else does one relieve the pucker from doweling cam bushings?
I'll defend anyone's right to booger anything they want to, particularly since most of the changes,such as Alex has suggested, are reversible or internal anyway. You don't preserve motorcycling by embalming motorcycles; you preserve motorcycling by bringing them to life and using them.
We are preaching to the choir or whatever the phrase is, because we all are so close in our perspective that our only differences are in our wordplay. I luv fudges and improvements where appropriate, especially if it saves money and grief, but on the other hand, I had a customer (who doesn't get his hands dirty) pound his '47 EL from Chicago to the Davenport Meet, and then toured southern Wisconsin before heading home, all paced by two BMWs. And never even checked his oil (he used so little that I fear for his primary chain). The motor is overbored, but other wise VERY factory by design (but re-fitted by yours truly).
There is as much validity to "If it works, don't fix it" as there is to "Time marches on...."
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