Why is my BMW G310R shaking when reaching a certain speed?

[YoungHolmes]

My BMW G310R motorcycle shakes when reaching 70 km/h. I wonder how to fix this. My friends told me that it's because the gear to speed ratio is unsuitable. I use the engine sound as a reference to switch gears.

1-15 km/h in 1st gear
15- 35 km/h in 2nd gear
35-55 km/h in 3rd gear
55-75 km/h in 4th gear
75 - 85 km/h in 5th gear
85- above km/h in 6th gear

Does anyone have the same experience? Did I do something wrong here, or do I need to get my BMW G310R bike to the repair shop?

 

[rzen24]

Its a strong engine, vibrations should be normal. wear gloves if you have to, but for me around 50kms/h on 4th gear is adequate enough though it really depends on the engine load.