You can turn a roaring old engine into a quiet whisper by tightening up a few key spots. First, swap in a high‑quality silencer or a twin‑channel muffler if you can; they’ll cut most of the roar. Next, smooth every moving part—lubricate that timing belt, check the valve clearance, and replace any worn bearings, because a rough bit can send sound all over the place. Then look at the exhaust—add a short‑length heat‑shield pipe and make sure it’s sealed tight so no air leaks. Finally, mount the engine on rubber bushing or a vibration isolator; that’s where most of the noise comes from. Give it a good tune, and it’ll be as quiet as a night in the garage.

Exactly, the quietest rides come from a clean, tight build. Keep your hand steady, check every joint, and you’ll finish without a squeal in sight.