I have been sold an LI150 API side case for my 150engine and it does not fir, the stud holes do not line up. I have tried it on 4 different engine cases and it fits none of them. The sell is trying to tell me that it will only fit a lambretta Li150 API engine as these are different to every other small block lambretta engine ever made?
has it not got smaller stud holes for the 2 exhaust studs? try it with the 2 exhaust studs out , see if it fits like that. if it does , you can drill these bigger.