ENGINE (Big Bore Kits, Camshafts and Engine Parts )

Honda Trail 125 / CT125 Big Bore Kits

Unlock more power from your Honda Trail 125 (CT125) with a big bore kit from Hard Racing. We stock top-tier CT125 engine upgrades from Takegawa, Kitaco, and OPMID.

Popular CT125 Big Bore Options

The stock CT125 engine displaces 124cc. A bolt-on big bore kit bumps displacement to 143cc, 150cc, or 181cc, delivering more torque for trail riding and commuting.

Brands We Carry

Takegawa bore-up kits engineered for the JA55/JA65 Honda Trail 125. Kitaco forged piston kits. OPMID high-compression bore-up kits.

Camshafts & Engine Parts

Pair your CT125 big bore kit with a performance camshaft. We also carry gaskets, cylinder heads, cam chains, and other internal engine parts.

Questions? Call 704-799-2192. Fast shipping from Charlotte, NC.