I'm assuming you ment 30-35? I have one, and it has been super reliable, until the rear cooler broke while a friend was riding it, drained all the coolant, and ran it until the engine lost compression secondary to MELTING the o-rings. Took the whole engine out. Both cylinders, pistons, was about to put it all together and noticed that the PTO rod bearing cage was slpit in half......it's been sitting since. I'll get it back together this year.
It was my fault, it ran very reliable and consistent, only issue I had was the boots popping off the carbs, but I got that figured out.
Call me if you have any questions 406 450-3326.
Mattymac the same setup on a 900 I know he was very happy with.