External tentioned clutch, 2,1,0,-1 gear structure, belt transmission, dual clutch option, 6.5hp ... Kw/rpm): 4.8/3600 Fuel Capacity (L): 3.6 or 4.5 Fuel Type: Gasoline Engine Oil ... 3pc x 4units, 24pcs in total, 3+1 structure);Optional configuration:Dual clutch structure, 4pc x unit dry field blades ( ... 32pcs in total), 2+1+1 structure Optional front ...