mr. boggs

i have a freshly rebuilt motor (maybe 200mi on since rebuild) in my 02 hawk and all of a sudden im getting a bit of noise when im accelerating hard and get to 7-8k rpm. A slappy wrap is the best way to describe noise. I am a bit concerned cuz shes been fine. Also i have been easy on her since rebuild, prolly havent even had it over 8 and a half thou rippems. overall driveability and idle are smooth as hell....?
ANY THOUGHTS? CHECK TIMING MAYBE?

Just_Nick

CruxGNZ

I'm with Nick, not sure what to make of a "slappy wrap" noise.

thetophatflash

Can you hear it when parked and rev the throttle? If so, I'd try a stethoscope. One that is battery operated and can have the sound pick-up flush against the gear case.

mr. boggs

will chk further tom. the noise was totally new yesterday when i took it for a ride..
the bike also started with a pop-bang, quite messed up sound, was not a typical backfire. im hoping this didnt cause the new noise at 8k rpm. it is a slappy wrap, no better way to describe

mr. boggs

everyone knows engine wrap. its just a slap type noise.

Wolverine

I've never heard the term engine wrap before. I've heard of piston slap and rod knock...



I'd take it back to your builder.

mr. boggs

sounds like a combination slap and knock other than that runs great till i hit 8k.