The 85HP Jabiru 2200 seems to be an ideal engine for the KR. You can find an acrobat version spec sheet at http://www.jabiru.net.au/engines/2200A%20Side%20A&B.pdf. Jabiru recommend a TBO of 2000 hours (with a Top Overhaul at 1000 hours). It also has a 200-hour / 12 month warranty and I understand they are very good about honoring it. They also have complete firewall forward kits for many homebuilts.
Phil Maley
