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This big bore kit is from Chung Yang. This is a 45.7 cc big bore that works as a replacement for the GP460 or an upgrade for the GP420. 42mm bore as well as a 33mm stroke. GP420 stock is 41.5 cc - this will upgrade your unit to 45.7 cc. Includes cylinder, piston, piston ring, and snap ring set.
Fits:
Trail Ripper 40 - Super GSR46R - Trail Ripper Quad - Super Go-Quad 46 / works with the GP 420 and GP 460 engine only.
SGSR Goped Big Bore Kit
Trail Ripper GTR Goped Top End Kit Big Bore
CY46 Big Bore Kit
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