Do not modify old. Buy new. Compatible fit 2002 to 2024 engines. Part number 21200-31Y20 is 300 USD

See the ends of the windows where the springs and plate have eaten in causing the plate and clutch to vibrate. Damage is only in the driving direction which is why we have the vibration only when under load. The plate is slightly loose when new and causes some vibration even then.

[@sharealike1]

Suzukis new clutch basket for DL 1050 engines from 2020 onwards are now good and do not require modification. There is no need to modify old baskets. Buy new and get the new springs and gears. They are backwards compatible so fit all 2002 to 2024 engines.
The part number 21200-31Y20 is 300 USD from the likes of Partzilla.