i really need help on my HB70 (2013). its original fault was consuming too much patrol, check with 1st mechanic he told me need tuning & change of air filter, i said go ahead he clean carburetor & change air filter but bike start missing and some time wont start on first kick. went 2nd mechanic he told me cleaning of carburetor is not done properly and air filter of brand "life" in not good so again need clean carburetor & change air filter "guard" once more i said OK but even second time the missing problem is still there and bike wont go more than 60 km/h speed and start missing already spent Rs.+800/- just on tuning. but problem still there and in cold engine its get worse.( i personally change new spark plug (NGK) but it doesn't solve the problem) please kindly help me out i really cannot depend on these mechanics anymore. many thanks in advance your help is highly appreciated.