Originally Posted by
chevvron
No I'm pretty certain it was a Rotax 508 now; it was a vertical twin like the 503 and I think the HKS was a flat twin wasn't it? It was early/mid '90s; '93 or '94.
Me too. I think I have a brochure from the time somewhere that advertised the Rotax 508 as an option on the AX-3.