Years ago, Extrude Hone was heavily advertised in all the Moto Mags. I never see any adverts for them anymore. They had a process of forcing a paste like substance (kinda like valve grinding compound is my guess) thru 2 stroke ports to basically clean them as a skilled porting shop would. So, I looked them up and they are pretty big now venturing into aerospace stuff. Wondering if anyone had their jug or cylinder head done by them. The pics on their site look awesome and they claim to do trans components.
Found 2 links :
https://extrudehone.com/
AND
http://www.extrudehoneafm.com/industries/automotive/