Athena 144cc Big Bore Cylinder Kit – YZ125 / YZ125X (2005–2021)
- Ships next business day
- 30-day hassle-free returns
- Call us: 541-668-7503
- Secure checkout — Pay in 4 available
✓ Fits:
- 2005-2021 Yamaha YZ125
- 2005-2021 Yamaha YZ125X
✓ Features:
- Boosts displacement from 125 cc → 144 cc
- 14.0:1 compression for explosive low-end and mid-range power
- Race-spec nickel-carbide plating for wear resistance
- CNC-machined head dome ensures uniform combustion
- Designed and tested by Athena Italy for MX and off-road racing
- 58 mm nickel-carbide-plated aluminum cylinder
- Forged high-compression piston (14.0:1 ratio)
✓ What's Included:
- As specified in product title
Ships fast from DuneGoonShop!
📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
