supreme_gti
Go Kart Champion
this one?I put in a dogbone mount insert last night, what a difference! Instantly smoother shifting and driving, and super minimal NVH. I went for the CTS Turbo insert, which is still pretty soft. I wish I had done it years ago.
https://www.ctsturbo.com/product/cts-turbo-mk6-billet-torque-arm-insert/
what about the torque arm?
It's better to upgrade both the insert and the torque arm
I'm still running stock (both insert and arm), ko4, no issues but everyone says it's worth the upgrade for smooth shifts.