I am wanting to do a big bore kit on a 2009 stock xp 800 154 and just wondering what the best one to go with is, 860 or 880? I have heard pros and cons from both and changing out clutch to, what should i go with and can you run a 3 inch track on a stock 154 skid? How much are these clutch and big bore kits going to cost and is there any places in red deer or close to who do really good work.