I think you'll find the only real wear and tear parts to replace at 15,000 will be covered in the 15,000 service. Belts, coolant, brake/clutch fluids, plugs and air filter. Oil and filter also.
A slipper clutch is a nice addition for spirited riding. Yoyodyne make a good one as does Ducabike and DP themselves. I believe a good one should run around $800 and install is very straight forward. 1-2hrs should cover it. Whom ever is doing the 15,000 service would most likely give you a good deal on the clutch install as they will already be working on the bike.
A slipper clutch is a nice addition for spirited riding. Yoyodyne make a good one as does Ducabike and DP themselves. I believe a good one should run around $800 and install is very straight forward. 1-2hrs should cover it. Whom ever is doing the 15,000 service would most likely give you a good deal on the clutch install as they will already be working on the bike.