Asalam-o-alikum Dear membersI have purchased a gs 150 bike in january 14 in start bike was goes to 115km/h easily but now a days it would not go above 105 kindly someone can help me to find out this probem i have also changed stock plug Ngk to denso but the problem is still there thanks in advance.Click here for SOLUTION
Get its tappet adjusted and replace or clean the air filter.