Cylinder Works Big Bore Kit 99mm for Yamaha YZ450F 2020-2023
- Ships next business day
- 30-day hassle-free returns
- Call us: 541-668-7503
- Secure checkout — Pay in 4 available
✓ Fits:
- 2020-2023 Yamaha YZ450F
✓ Features:
- High-Performance Design : 99mm bore with 12.8:1 compression for maximum power output.
- Durable Construction : Nickel silicon carbide-plated cylinder ensures extended life and reduced engine noise.
- Stock-Like Appearance : Looks just like OEM for a clean, professional fit.
- No Machine Work Needed : Bolt-on installation for hassle-free upgrades.
- Reliable Performance : Matched with Vertex pistons for longevity and optimal performance.
- Replacement Parts Available : Piston, gaskets, and ring sets sold separately.
- Racing Use Only : Not legal for use on pollution-controlled vehicles in California (waiver available).
✓ What's Included:
- Complete Big Bore Kit : Includes cylinder, Vertex piston kit, and top-end gaskets (valve stem seals not included).
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.
