Originally Posted by ryan_c
"pinging" under load is usually a sign either that your timing is advanced too far, or that you need to run higher octane fuel.
wait, wrong interest. stop confusing me!
i advanced the timing from 15* to 17* but thats within limitations of 87 octane... and my engine will ****** the timing if it starts pinging, anyways. the improved throttle response and midrange power tells me its fine...
Originally Posted by ryan_c
Oh yeah, fo' real, if your chain is worn out (stretched) it will make that noise on a new cog/freewheel when you pedal, as if you had worn in the old cog and the chain together, they wear in together, very slowly giving the teeth of the cog a slight ramp. If you are using a stretched chain on a cog without ramping on the teeth, it will clatter slightly against the edges of the teeth, until the teeth wear down (which doesn't take long with a older chain).
well, the chain came on the bike -- so both are about a month old. the freewheel is has a few more months of life on it because it came from a friends' bike. will the noise attentuate the more i ride the bike?