Assalam o Alikum.
I recently got my bike engine overhauled. After completing 1000km, I got engine oil changed and tuned up but having vibration problem. It's vibrating in high speeding. I concerned the showroom and mechanic recommend to change the engine oil because the Suzuki Co. engine oil is now not good. They are providing inferior quality and also recommend me the Zic oil. I just want to confirm, is that really oil problem or any other reason for engine vibration. Second, there is a whining sound in clutch box. In low rpm, clutch box is producing sound but sound decreases in high acceleration but when i loose accelerator in high speed like 80 to 100, it produce noise and sound decreases as the speed gets decreased. Mechanic says that clutch box need to be replaced but is there any other solution of this problem? Clutch box is too expensive so i am seeking any alternate of this problem. Is that really clutch box problem or any baring issue?
Please suggest me what i should do to resolve these two issues.