HI
JUST REMEMBERED,AN OS 7D CARB an early one NEEDLE VALVE ON THE CARB will bolt right in ,a very excellent carb( from an OS 91 or 1.08 FSR series ) you can also use a 61 to 108 ASP CARB,THE EARLIER carb that is an OS FSR clone engine ,the super tiger 90 carb will also bolt right in,all above are good options and will help the air line problem-,the OS being the best as is usual-TONY