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Old 31-03-2015, 01:25 PM   #60
Mr Gazza
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Join Date: May 2013
Location: Norwich
Bike: M900sie
Posts: 5,834
Not sure if I am blinded by science or baffled by bullshine, but I did'nt understand a word of that, Capo..

I think you may have taken a swerve and moved the discussion to the inside of the tract rather than the outside.

Polishing the inside has been proven to be worse than a rough finish. the best being a dimpled surface like a golf ball apparently. at least that is what they found at ERM when I used to visit them in the early 90's...They did a lot of work on 7R and G50 heads...As indeed did the AMC race shop in the 50's and 60's....Williams is a name that springs to mind.
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