new user here...from shah alam(bukit jelutong)...black n white auto clutch....just done 2500km....one question...i'm using EO with ester(forgot the name de)...after 1k mileage my bike feel sluggish...y r?? all still standard...is it because everyday i maintain 140kph on highway n sometimes 160kph when i'm late to class??

yup...160kph n sometimes if got luck n less wind can go 175kph n i am 85KG ....maybe because federal highway is a bit downhill from batu3 to sec7 exit n its still a new bike....i doubt my engine can tahan lama if i keep ridin it like that... i want to decrease my rear sprocket size n change my chain...my bike 1st gear 40kph...2nd 80kph...3rd 135kph...4th 160kph(confirm usually will get) to 175 kph(with lost of luck)...with the standard sprocket, the engine will high rev to soon example 1st gear...i can push it till 40kph but at 20 kph the engine will rev to high like (screamin help me!!!) till 40kph...is it normal?? will decrease the rear sprocket will help it less screamin n still maintain or add more my top speed for each gear?? what size u guys recommend??

no laa....i just dont like the sound of screamin...feel like my bike want to roboh..

i dont know is it a first batch or not....how to recognize?? but as i test my bike with car meter..140kph on my bike=around 100kph for car...i buy it in early march this year n only done 2500 km mileage....

i'm studying in uitm...always at sec 7...almost every evening at kedai mamak barra or khalifah at commercial center...