Both Airsal and Hebo Manston cylinders 50 and 70cc for speedfight come with the exact same casting flaws, most noticeably is the difference in size between the left and right transfer ducts.
Must be made from the same casting, just different porting and bore.
Great quality controll! I guess thats the "power of engine"
Airsal t6 asso
Airsal t6 tech 50
Hebo replica 70