hello friends for quite some time i have been facing couple of problems my R15 which is 2 years old and have done around 7500kms . after the last service where i have changed the engine oil and did some 800kms, now i am facing a few problems for which i need advice of my experts at xbhp.
1] engine sound is hard even more hard between speeds of 68-75kmph.
2]vibrations can be felt on the handelbar and foot pegs, when discussed about the matter with the service engineer he says it may be due to clutch cable or due to malfunction in the chain sprocket system.
3] pick up, top speed and torque have gone down.

yesterday i have received a message from yamaha for a free replacement of radiator with a new one free of cost.

guys please do help me resolve the issue