Overall, the inspection is pretty straightforward, though you’ll want to drain and remove the radiator for better access. Bad news? Suzuki recommends changing spark plugs at 7,500 and 14,500 miles (repeating every 7,000 miles). In doing some research on the DL engine, I discovered or, probably, just re-remembered that the first-gen DL had similar spark plug-replacement intervals. That wasn’t such a big deal when you’re dealing with two CR8EKs at $10 a pop. But the current DL uses special NGK plugs—LMAR8BI-9—that cost $40. Each. Um, no way. I removed all four, inspected them carefully, and returned them to service. They look great, and the gaps are right on. If this were really my bike there’s no way I’d pop $160 every 7,000 miles for new plugs.