QUOTE(cahayamalamku @ Dec 3 2015, 10:37 PM)
if stock engine can use these exhausts? will they damage the engine?
my ODO will reach 24k km soon. do I need to do top overhaul? why do we need to do top overhaul?
Full system exhaust changes power character, so supposedly need full retune. A proper tuning needs a dyno, so I guess we can forget about it.
For most models, just plug and play, except for AHM M1, if I'm not mistaken. During use, if notice any flat spot, just take note of throttle position and RPM, and we can discuss here on improvements.
LC service interval is 6k, so 24k km should be about right. Nobody really does top overhaul unnecessarily, and it isn't something that can be inspected easily.
Sometimes, poor workmanship during head removal and reassembly will just make things worse. Unless, if you can hear noises related to camshaft, or timing chain, perhaps you should consider it. Other than that, spark plug, air filter, inspect wheel bearings and swingarm bush, steering bearing etc.