KFX400 / LT-Z400 / DR-Z400 90mm Stock Bore Race Kit - Athena (2000-2016)
- Ships next business day
- 30-day hassle-free returns
- Call us: 541-668-7503
- Secure checkout — Pay in 4 available
Rebuild with factory-level performance - no machining required. Bolt-on stock bore kit with Factory Works porting, 12.2:1 piston, and race-proven durability for ATV, supermoto, or dual-sport builds.
✓ Fits:
- 2003-2006 Kawasaki KFX400
- 2003-2006 Kawasaki KLX400 / KLX400R
- 2003-2014 Suzuki LT-Z400 QuadSport Z / LE / SE
- 2000-2016 Suzuki DR-Z400 (all variants)
- 2004-2008 Arctic Cat DVX400
✓ Features:
- 90mm stock bore - direct OEM replacement, no boring required
- Nickel-carbide plating - extreme durability, low friction
- Factory Works porting - max airflow, race-tuned performance
- 12.2:1 forged piston - aggressive mid-top power
- Hard-anodized power valves - faster response, longer life
- Made in Italy - pro-grade precision
✓ What's Included:
- 90mm Nickel-Carbide Cylinder - Factory Works porting
- Forged Domed Piston Kit - 12.2:1 compression, rings, pin, clips
- Hard-Anodized Power Valves - high-flow, non-OEM
- Athena Top-End Gasket Set - head/base gaskets, seals, hardware
Note: Reuses OEM cylinder head (not included)
Note: Bolt-on install - no machining required
Note: Advanced install - top-end rebuild experience recommended
Note: Jetting/fuel tuning may be required for optimal performance
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.
