Racer of former Moriwaki and Yoshimura did not have a side cover, and exposed battery, and it was cool with lightness.
And, in the present age, there is a custom to remove a side cover, it is called 'SUKA tune'.
In addition, it is called Adachi Kei.
'SUKA' is a meaning to be empty.
The greatest good point of Adachi Kei is a position of the battery.
At first, Change battery for an MF type.
And, incline battery along a frame.
Battery is out of sight in this.
It seems to be easy at a glance, but it is a very troublesome custom.
And there is really an effect becoming light in movement.
The trouble that an important side cover flies in this disappears.