You got a lot of good info in the reponses,I roadraced a 1972 500w/592cc Yosh 550 motor
that Pops ported the head on,I did mine,dual setup,you can feel the difference on the track
esp Road A,put the calipers in the rear for all the reasons listed,function first,looks second
you win both ways,The little 592 was highest placing Jap bike in Vintage 4 @the GNF finals
at Road A in 1988,H1s,H2s,and CB750s were all present,the 4 in front were all 850cc's or bigger!