I have several Rotax 493 and 494 engines and parts as well as Crankshop pipes for a Rotax 593. Complete fresh lower ends, cylinders(some RAVE some non RAVE), pistons, cranks. Good complete running Hulings 494 including ECM. Too many fly weight sets and springs for Polaris primary clutches to list,,,All these items are used in SCCA Formula 500 class cars. Many more F500 related parts available..give me a call at 810-441-9608..thanks