The best thing to do, is to take the Ski-Doo, to your Ski-Doo dealer, or, any other Ski-Doo dealer, for that matter, and, ask them, specifically, what size riser blocks, will be best for you. They have the books, and other important information, that, will tell them, what riser blocks will be best for your situation. They can tell you, exactly, what will be best. So, there are no problems.