WORKS ON ALL HONDA AND LIFAN 50'S WITH THE 39MM X 41.4 BORE AND STROKE 291C @ _#4 @ GUIDE/SLEEVE FOR_SMALL D-RING ENGINE_STUD W/OIL_PRESSURE (292T) 292T @ _#5 @ WASHER SPACER GUIDE (292Y) 292Y @ _#7 @ 14.5_X_2.5 O-RING CYLINDER_TO_HEAD (292W) 292W @ _#8 @ *SQUARE_RUBBER O_RING_GASKET FOR_OIL_RETURN AT_BASE_GASKET (sold_each) 91303-035-000 (274H) RUBBER GASKET ATC70 1978-85 HAS THE SQUARED EDGES 274H @ _#9 @ RUBBER GASKET MOST_50'S/70'S STUD O-RING 9MMx1.5MM REPLACES 91306-141-000 91306-035-000 (sold_each) 1/22M (292X) THIS IS A NEW SMALL RUBBER GASKET WITH SQUARED EDGES FOR TONS OF 50'S AND 70'S 292X