The rings should fit perfectly parallel to groove surfaces.
If not, replace the piston and all the piston rings.

Piston Ring/Groove Clearance Standard:
Top 0.03
0.07 mm (0.0012
0.0028 in.)
Second 0.03
0.06 mm (0.0012
0.0024 in.)
Service Limit:
Top 0.17 mm (0.0067 in.)
Second 0.16 mm (0.0063 in.)
Piston Wear Inspection
Piston Ring Groove Width InspectionPassenger’s Seat Installation
Insert the tab on the rear of the passenger’s
seat into the slot in the
frame.
Insert the projections at the front of
the passenger’s seat into the holes
on the frame.
Push down the front part of the passenger’s
seat until the lock clicks.
A. Passenger’s Seat
B. Proj ...
Front Wheel Removal
Remove:
Front Caliper Mounting Bolts [A] (Both Sides)
Front Caliper [B] (Both Sides)
Loosen:
Front Axle Clamp Bolts [A] (Right Side)
Front Axle [B]
Remove the lower fairings (see Lower Fairing Removal in
the Frame chapter).
Raise the front wheel off the ground.
...
Overview
Kawasaki Intelligent anti-lock Brake System (KIBS) offers enhanced braking
stability (ABS performance
equivalent to the current model) to supersportmodels, which pitch more than most
motorcycles
and also offers high-precision front and rear brake pressure control
(high-precision ABS) for spo ...