Well..I am getting close to 2,000 miles now on my Dueling Titan. I have replaced my clutch pack once at around 700 miles. And.I am not sure I would have had to do that, except I was out mountain climbing running a 36T. Abuse..I know..But clutch packs are inexpensive and not hard to swap in. I will not do any more mountain climbing with a 36T. A 50T would be fine. But..It is the first Titan and I needed to know how long such abuse could last on a clutch. Now I know. Just stick with the 44T that comes with the kit and a longer life is the rule. Other than that..Nothing.. Not even an oil change. It may need one soon. I am still running the same Drive Chains. Unlike other kits that run belts. Ok for a Harley which uses a huge Cog Belt. But for the bikes, they are too tiny and only last 400-500 miles and are expensive and hard to replace. Gosh..I run 50 miles in a day..Easy..So..10 days is all I would get from a belt? Better Carry extra belts..Yikes !!! Stick to chain. Chains are smooth, inexpensive, smaller, and last a lot longer , and easier to size for different bikes and sprockets. On one of my Harleys, a pebble got up on to my belt and then was clocked into the belt. No kidding. On another Harley of mine, the belt would chirp on decells. Nothing crayons would not fix. Every few days I would sprinkle some crushed crayons onto the belt. That wax is good dry lube. Harley used to sell some spray wax to make the belts quiet. The Harley I ride all the time now is a Chain Bath version. The all have pros and cons. But for our bikes, Chains rule... And when it comes to Bicycle Engine Kits, Titan Rules !!! There is nothing better at any price.. Enjoy the ride....