My current commuter 750 has always had a certain engine noise, ever since I got it two years ago. The noise is a bit of a diesel-like sound, not loud and really only there at low rpm and under initial acceleration .
I figured it's just a valve with excessive clearance (I intend to check the valves this winter), because I checked the camchain tensioner and it was well-adjusted. In fact, the whole bike was pretty much un-abused though neglected, sitting in a storage bin from '93 to '04. I've put ~2000 miles on it since purchase, and it still only has just over 10K miles on it.
On my regular hour-long commute this morning, I stopped at Dunkin Donuts at about the halfway point. When I left from there, at the next light, I noticed the engine no longer makes the sound. It still runs great, but I mean it's just suddenly quiet. It's not like it faded over time, it just stopped.
So at the next light, I hurried through the gears with heavier acceleration at low rpm to see if the noise was still eveident. Nope. Quiet. Running great. In fact, it seems to have more power.
What the heck?
Post edited by: Biquetoast, at: 2006/11/17 10:47