ROTAX 503 UL CRANKSHAFT | MAIN BEARINGS | PISTONS PARTS

• a   with 2 rings, standard
• b   with 2 rings, 1st oversize
• c   with 2 rings, 2nd oversize
• d   Standard Size
• e   1st oversize
• f    2nd oversize
• g   NOTICE use only once!

Explanations of symbols and statements in part number charts:

• N = Newly introduced part number
• s.v. = Still valid. Part was replaced by compatible component and can not be supplied any longer by the producer. Existing stock may be used.
• AR = As required. This generally refers to shims, hose, wires, and cable. Measure the amount you need before ordering. Many times there will be multiple listings of different lengths with the same part number. Use individual part descriptions to determine the proper length needed.
• n.a or NLA = No longer available, no replacement from Rotax. Part is no longer available due to incompatibility to current production or unavailability of part.