I own Bajaj Pulsar 150 Dtsi 2006 model. it was just fine till all my free services were exhausted. There after some problem crept in my bike. It is like this. When i start my bike for office in the morning it rides absolutely fine and smooth. But after some 10 km, it suddenly gives me a rough ride. When i engage 5th gear, it feels as if i am revving in 2nd or 3rd gear. During this time bike vibrates a lot, and does not more than 60 or 65 kmph. It feels as if the bike is being dragged from behind. I get my bike serviced at regular intervals from authorised dealers only, the bike is being used only by me and i do decent driving. I also notice some pink coloured oil spillage under the engine where i park my bike. I consulted with the service center guys, but they said that its just a loose dip stick cap and they added a rubber ring to stop it. But the problem is persistent. Please help me in this regard. Kamesh, Chennai, Tamil Nadu.