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INFORMATION
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Trail Bikes 146 High Compression Bore Kit for 124cc Engines
This will make a huge difference in performance over your stock setup and is a very quick and easy upgrade as it does not require case boring. We found the right level of compression for increased performance while also keeping reliability in mind. For additional performance, add the 26mm carb kit available in this section.
Features:
- Lightweight 57mm aluminum cylinder with steel sleeve
- High compression 57mm piston with rings, pin, & clips (replaces your low compression dished or flat top piston)
- Head gasket kit
NOTE: This kit will only work on Chinese 124cc engines with a 52.4x57mm bore and stroke and a 13mm piston pin. Common models are Pitster/GPX and Thumpstar.
INSTALLATION NOTE: Don't use the original o-rings between the head and cylinder (not needed) but do use the large o-ring at the bottom of the cylinder between the cylinder and the engine case at the oil return.
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