- Big Bore Kit
- Brand
- 50 Caliber Racing (53)
- Advantage Parts (28)
- Alpha Rider (36)
- Athena (163)
- Athena Az Quad Parts (30)
- Bbr Motorsports (79)
- Cylinder Works (139)
- Harley-davidson (30)
- Honda (55)
- Hyway (31)
- Niche (68)
- Power Part Pros (57)
- S & S Cycle (167)
- Smm (29)
- Tb Parts (173)
- Tbparts (74)
- V-twin (37)
- Vertex (51)
- Wiseco (95)
- Yamaha (60)
- Other (2757)
- Compatible Make
- Engine Type
- Machine Type
- Material
- Type
- Big Bore (43)
- Big Bore Kit (178)
- Big Bore Top End Kit (6)
- Block Cylinder (6)
- Complete Cylinder (33)
- Cylinder (22)
- Cylinder Barrel (67)
- Cylinder Block (11)
- Cylinder Kit (85)
- Cylinder Piston Kit (8)
- Cylinder Rebuild Kit (6)
- Engine (5)
- Engine Kit (6)
- Engine Rebuild Kit (206)
- Piston (14)
- Piston Kit (108)
- Rebuild Engine Kit (6)
- Top End Kit (11)
- Top End Rebuild (5)
- Top End Rebuild Kit (45)
- Other (3341)
57mm 125CC Big Bore Cylinder Kit For Yamaha TTR125 TTR125E 2002-2005
Aftermarket big-bore upgrade kit, NOT a genuine Yamaha OEM component. Cylinder/Piston Bore Diameter: 57mm (big-bore upgrade).
Cylinder Outer Diameter: 59.5mm. Actual Engine Displacement: 124cc (marketed as 125CC). Compatible with YBR150 cam rocker arm setup.
Replaces OEM Part Number: DEE-I18J0048. Package Components: Cast iron cylinder block, piston, piston rings, piston pin, circlips, full gasket kit. Construction: High-strength cast iron cylinder, durable aluminum alloy piston, premium sealing piston rings. 57mm big-bore upgrade enhances engine displacement to boost off-road power output. Direct drop-in installation, perfectly matches OEM mounting dimensions without modification.
Compatible with YBR150 cam rocker arm for optional performance tuning. Heat and wear resistant for long-lasting durability in rough off-road terrain. Independent aftermarket product, has no affiliation with the Yamaha brand. 1 × Full 57mm 124CC Big Bore Cylinder Piston Kit (all components for engine top-end upgrade).