Need help finding the right size clutch for this engine

[Berry_brah187]

I need help finding the right size clutch for this engine
it's an 18mm but I can't find any that size

 

[itsid]

So a GX120 then... S Type shaft ?

18mm clutches are available on amazon / ebay every now and then,

if you cannot track one down, just shim the shaft with a 50x50mm 0.5mm piece of sheet metal rolled to a tube
and install a 3/4" clutch

'sid