changed my oil at 250km (zic 4T 20w-40) from piaggio service center , they checked all nuts and bolts and tight the chain and done some oiling were needed in all bike.
after that the bike feels very diff , it gets 50% more smoother and the clutch got softer. nice feeling
went on trip with friends right after that , pushed the bike till 80km/h at some places but mostly maintained 60km/h speed so that engine don't get very hot and stressed
but the engine was quite and smooth not getting stressed at all. very satisfy with performance . reach 80km/h very easily with 5.5 rpm and the bike was very smooth and relaxing on that speed. brakes also performed very well at that speed.
try to open up engine little bit today and it worked very well. bike gare ratio is improved and engine is smooth now, now i will change my oil at 600km