I don't know - I have a few hours testing an HKS engined X'Air, and thought it was a horrible underpowered little lump, but never really got to know it very well.
I do know that if I had a problem, I'd probably call P&M Aviation at Manton, as they have a few people there still who were involved in certifying the HKS engined AX2000 and they're probably a knowledgeable as anybody in the UK on the thing.
G