You're gonna need this, for this beauty:

PINASCO SLAVE ENGINE (251CC, REED VALVE); PX, P200 (Sku: 1100-1512)

While you’re at it, you might as well add these too!

PINASCO ENGINE BEARING SET; 251CC ENGINE (Sku:1100-1530)

PHBH DELORTO CARBURETOR 930MM; 251 ENGINE KIT (Sku: 1300-1163)

PINASCO SPRING GEAR KIT; 251CC ENGINE (Sku:1100-1531)