Triumph Rocket 3 GT 2021 - Page 367

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2. When checking the piston ring end gap, always refer to the specifications table (see
Pistons).
NOTICE
If the end gap is too large, replace the piston rings with a new set.
If the gap remains too large with new piston rings, both the pistons and barrels must
be replaced.
If the gap is too small, check the cylinder bore for distortion, replacing as necessary.
Do not file the piston rings.
3. Repeat the procedure for the remaining piston rings.