There is only one spring that affects the reverse gear. It's located on the lower right-hand section of the case, above the (2nd) 1/2 spring.

Remove this spring and install the HR spring to increase the sharpness of the reverse gear.

This is an optional step, typically this spring is not changed but can be if desired.

Be sure to use a dab of Hondabond on the threads to prevent a fluid leak.

Use a torque wrench and tighten to 16 lbf-ft (29 N-m / 3.0 kgf-m). Do NOT over tighten as the bolts will break.