Originally Posted by Kreuzer

1.

Second issue is the sound I hear on 4th and 6th gears. It's like grinding or something, not too strong as sound, more as vibration I feel with my feet. I am also wondering if this is normal and if it will go away too.

Like I said, I've been riding my upgraded bike for 1.5 months, 5 times per week in average, making 12*5 = 60 km per week. So it's like 60*6.5 = 390 km (242 miles).