Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
The original Jock Kerr 605 conversion used modified 750 pistons with the liners very thin, i had one of those as well and the liners broke!
Whenever I see the name "Jock Kerr" I cringe at the memory of my room-mates 180cc CB125S in the 70'sIt was dreadful...