Piston slap maybe? - James O'Gorman
On Jun 9, 2011, at 12:43 AM, Lie Njie <[email protected]> wrote: > So I started my cross country trip. All was great for the first day, but > then I started hearing a strange noise that sounded initially like a rock in > the engine rattling around. But it doesn't sound like it's in the engine. > > It happens in every gear (and neutral) at around 2500 RPM. Goes away by 3500 > RPM in every gear. > > Goes away immediately when I pull in the clutch if it's in gear. If in > neutral, doesn't go away. > > Started happening after I replaced the clutch (mechanic did the work, was 1/2 > the price of buying the stupid honda-specific clutch tools), spark plugs, and > cleaned out the air filter. > > Took it to two Honda mechanics, both said they didn't know and didn't think I > should pay to have the engine taken apart to find out since the bike is > riding fine. One said maybe I dropped something metal into the engine > somewhere and 2500 RPM is the harmonic that makes it rattle. Other said that > it sounds like maybe something is spinning and scraping on the spinning only > at 2500, and maybe the sound is coming from somewhere near the alternator. > > I did the listen-with-screwdriver-as-stethascope test on most of the engine > parts and can't identify it. Sounds similarly loud on either side of the > bike, definitely somewhere in the engine. > > I've done about 500 miles since the noise started. It got a little louder, > but I don't notice any performance issues and it hasn't gotten any worse. > Still exactly 2500 RPM in each gear, and then goes away after 3500. Doesn't > matter if engine is warm or cold, or how long it's been running -- it's > consistent. > > Anyone have any ideas? > > Thanks! > +Lie > > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/nighthawk_lovers?hl=en. > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
