Let’s perform a Deco-mainte (inspection and maintenance work). We also replaced the governor. We’ll replace the chain and sprocket. Since a GSX400S Katana wheel is installed, we’re proceeding carefully while checking. The rear sprocket gave us quite a bit of trouble, but we managed to work it out. Since it’s for a 400, we’re sizing up from 525 to 530. We wanted steel if possible, so we made it work one way or another. Let’s remove the rear wheel and clean the inside. There are certain times when only the technician can do this kind of work. The wheel damper is in good shape, so that’s great. Suzuki dampers are really durable. We adjusted the wheel bearings. The axle shaft had no issues. The caliper piston operation is fine. There is some corrosion on the piston. If it gets worse, we could consider an OH down the road. The collar was corroded, so we polished it. The other side had multiple shims, so we rebuilt it. (I think fewer parts are better.) We disassembled the side stand and lubricated it. Quite a sharp design on the backstep. Very innovative. There’s oil present, so that’s reassuring. Clutch lever. So there are levers with bearings in them. We’ll disassemble and lubricate the brake lever as well. Same with the throttle. It was in nice condition. We’ll clean the rear caliper. The operation is good, but it was a bit corroded. The air filter was clean, so we’ll reuse it. We’ll clean the front and rear discs. It’s been a while since I’ve seen so many holes… the motivation is building! Brake discs tend to accumulate dirt surprisingly. I don’t think there will be a dramatic effect, but if the pad cleaning effect improves by even 1%, I’d be happy. We’ll check the fuel cap condition and clean it. If you clean the key of debris once in a while, it should run a bit smoother. We’re moving right along, but we’ll replace the front and rear fluid with Golden Cruiser DOT4. The wiring between the generator and regulator had no issues. The generated voltage should be fine. We’ll check each fuse one by one. Since it’s a place you don’t normally look, maybe that’s what inspection is all about. Checking the spare fuses too gives peace of mind in case of emergency. We’ll change the oil. ELF MOTO4 RACE 10W-60—I think this is perfect for summer. When selecting engine oil, you need the ○○W-○○, but it’s good to check the kinematic viscosity (40–100 degrees) that the manufacturer publishes. I don’t trust aluminum drain plugs, so we’ll swap it for an iron OEM part. It’s the drain from an R1000 or Hayabusa. It’s 17 mm across the flats. We adjusted the carburetor synchronization and we’re done.
