For those that have never ventured.....the build-up is standard from chain lube "yield" and dust and dirt accumulation. If you notice in the dirty-photo, the build-up on the rod forward of the sprocket. "That" is why people's clutch-rod seals start leaking. It eventually "roughs" the radius of the rubber seal that is responsible for keeping a fluid seal on that clutch-rod. Then you have to do a lot of work to get that seal replaced. If I might recommend...I've done three cover / sprocket / clutch-rod cleanings at roughly 12,000 mile intervals. I'm shortening that interval to 10,000 miles from here on out.....
If I may, it is my opinion that Suzuki should have put in a cast radius inside the cover between the chain and the clutch-rod containing the fling from the chain, and isolating a problematic condition that causes seal failure. The aftermarket billet covers come with them, why not the stock ????....Anyway, if you're reading this and haven't done this service in a long time, do it now. Not later...NOW.
If I may, it is my opinion that Suzuki should have put in a cast radius inside the cover between the chain and the clutch-rod containing the fling from the chain, and isolating a problematic condition that causes seal failure. The aftermarket billet covers come with them, why not the stock ????....Anyway, if you're reading this and haven't done this service in a long time, do it now. Not later...NOW.