Bs4 sa bs6 tez nahi hai bro Tumhari bike mein valve ki issue hai is liye 130kmph slow hoo raha hai Meri bhi bs4 ns mein ese hii Hua tha bike 150kmph touch karne mein sussu Kar rahi thi Valve change Kar ne ka baad bs6 kia bs3 bhi salt nahi raha hai side mein 159kmph touch Kar raha hai