Are you sure it is a NTV engine? A few years ago I met a guy from Belgium with a NTV swingarm and wheel in a XLV at the Swiss XLV meeting . But he had the stock XLV750 engine. Maybe we are talking about the same guy? If it's possible to put a NTV650 engine in the XLV750 frame I would like to hear more about it! Greetings, Schelbi.