Thirdly the metal to metal sliding or knocking sound can be due to improper valve clearances i.e. shims. Check your valve clearances and replace your shims if needed. A worn shim or higher clearance than normal would mean, once the engine is heated, you'd hear "katatatatata, or ticktickticktick" sounds, get them checked.
Fourthly, leaky forks. Either they've not replaced the fork seals, wherein they just clean the seals and install them back, this causes the forks to leak after sometime. If there are scoring on the fork slider (silver part) this would eat the fork seals. Start off by checking the slider for any nicks or hot spots, if all is fine, replace the seal and make sure it's replaced and oil topped up in front of you. 450 ML per leg.
Quite a list to look into, take them one at at time and make sure it's all ticked and inspected. Keep your observations posted.
Hope it helps!
Cheers!
VJ


..i havent ridden longer after adjusting freeplay..i will post further observations. About throttle body cleaning, it was done when i gave it for service. Actually the svc guy recommended doing it when i said the bike was sitting idle for 11 months. But the thing was they did it by some mechanic outside the authorized svc.
. That's what they said to me. The spark plug was not cleaned though i guess. I will check the sparkl plug and go for replacement if neede.

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