clicky sound

[kickstartkx]

When i am on whoops with my bike(04 KX 125) and i have it on the edge of where the powerband would kick it it kinda makes a realy fast clicking noise, i have never herd it untill i rebuilt it i never hear it any other time and the bike run great, I dont think its from somthin radling around somewhere it sounds likee it is comeing from the moter.

 

[CRguyStan]

Sounds like the new top end knocked out the muffler bearing left handed spindle!
My only guess is the power valve is now cleaned up and the lack of goo from the pre-mix doesn't cusion the rapid open-close giving you that "clicking" sound.
Stan