If you plan on getting the bike wet, you may develop some rust. Thats really the only downside and part of the reason why the clutch is so sealed up from the factory. The upsides are tremendous; better cooling, more noise (a big plus) and kool look. Most people replace the pressure plate with a red one, so it looks better then the stocker, which is kinda ugly. But even a quick spray painting of it, will look better.