You can still do the 900 kit without powertech. We have done this kit on both these motors, they both produced 164hp. The only difference is that the non powertech motors didnt seem to last as long as the motors with powertech. As for the 960 kit, we haven't been told any sort of price, and...
If you have a 800HO with powertech, we offer a 900cc big bore kit. As for the 800R, we offer an 880 right now but there is a 960 currently being developed.
i can get you a full exhaust from a company in the states that does all of rotax's race development for there atv's if you want to know more you can call mots machining in st. albert at 418-5595