I installed it as it was in the box. The result was great , no noise (clac clac clac....) at any rpm. The engagement is smooth and precise, you can foward by 1 inch if you want. If the snowmobile would have had this sound when new we would have never tough about noise problems and we would have been really happy with it.
The acceleration as improve, I hit 60 mi/h just for fun ..( pantera 7000 xt) is a big machine with à XF you will ... Fly maybee. I dont know about the top speed.
I add the extra weights to lower the rpm, I was at 7000 at 70 km/h now Im at 6000.
600 miles with it yet and just fun. It is the same clutch they use in the 1200 ski doo brp aftermarket.
You can go on yutube and check for:
Power Block 80.
A lot of People rely on this here and they are extremely reliable. Polaris put them stock in a lot of models.
The compagny that makes it (CV Tech) dont list the 7000 arctic cat engine, I spoke with a tech over there and he suggested me the number i putted in my last post, I gave it a try and I am astoniched happy finally no more clac clac clac at idle or buzzzz at 25 km/h.
Excuse my english I'm french guy.