Join Date: May 2014
Location: Hoffman Estates, IL (Chicagoland)
Rep Power: 1
Noise under load
I have been trying to search to find the answer, but got nothing. Since I bought the bike (2003 919 with 30k miles), before any mods, I noticed that under hard acceleration in a higher gear, meaning lower RPM range, there is what sounds like a tapping/clunking noise coming from the engine. I have always brushed it off as nothing, and it has not gotten any worse since doing the PAIR valve mod, the flapper mod, K&N filter, or CBR900rr header. Still the same sound, in the same RPM range, only under hard acceleration. Any thoughts on what it could be? Does this sound like a possible valve clearance issue? Should I be worried?
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