I have been facing this issue for a month now on my CG125 2011.
Whenever i ride really fast and than let go of the throttle the bike does some missing as if it's about to stall, awkward sound (no blasts or anything) i had the carb cleaned and tuned and new spark plug installed but the problem persists.
This happens only after rapid acceleration and only when i let go of the throttle.
My silencer is after market i mean it's original bought it for Rs2200 (Not windor). Could this be an issue although it has been 3 to 4 months since i had it changed.
Also i notice some oil in this area i cleaned it my self a week back but today i saw it and it was there again
(pic not of my bike but for reference only)
bro sadly this type of indications are found when a bike have it engine's head open are u second owner
3rd.......and the head isn't opened everything is sealed actually in a year or so it might need to be opened as it's reducing oil very slightly at the moment blue smoke only on full throttle, not in normal running.
I was hoping that there might be a solution to this silencer problem, perhaps something wrong is setting as it only happens occasionally on the letting go of the throttle i.e. and after pulling it hard.