my honda cg 125 used to cross 124km/h on ulysse speedometer easily. But recently it isnt even going above 104. i got it tuned and mechanic ney intake ka tppet tight kr dia tha after 200 km i got it checked and loosened up. ab bike still wagera kch b ni marta but 103-104 stuck hai. i also goat the ahl 20-50 oil for the first time. previously 20-40 ahl ka dalta tha. i dont know what could be the issue. i mean bike a1 chul ra. 16 model. 11700 kch driven. suggestions would be really appreciated.