ZS54/1MM/CU/HG @ CYLINDER_DOWEL_PIN (8MM_X_14MM) 6.8MM_ID 8.0MM_OD USE_WITH_6MM_STUDS (263T)CYLINDER DOWEL PIN LONG 14MM THIS IS THE ONE THAT NORMALLY GOES BETWEEN THE HEAD AND CYLINDER LIFAN 110CC AND SMALLER ALL HONDA 50'S AND 70'S 263T @ CYLINDER_DOWEL_PIN (8MM_X_12MM) 6.8MM_ID 8.0MM_OD USE_WITH_6MM_STUDS (263S)CYLINDER DOWEL PIN SHORT 12MM THIS IS THE ONE THAT NORMALLY GOES BETWEEN THE CYLINDER and THE TRANNY CASES OR CLUTCH COVERS LIFAN 110CC AND SMALLER ALL HONDA 50'S AND 70'S 263S