Cylinder Works 51001-K01 90 mm Big Bore Cylinder Kit – KTM 350 SX-F/XC-F 2011-2012

Enhance your KTM 350 with the Cylinder Works 51001-K01 Big Bore Cylinder Kit, a direct bolt-on upgrade boosting performance to 365 cc. This kit includes a 90.00 mm cylinder, Vertex piston, and top-end gaskets, perfect for 2011-2012 SX-F and XC-F models. We price-match reputable online stores—contact us to ensure you get the best deal!

✅ What’s Included

• Cylinder Works Big Bore Cylinder (51001-K01)

• Vertex Piston Kit (piston, rings, pin, clips)

• Top-End Gasket Kit

• Installation-ready, direct bolt-on design

• No additional hardware included (uses existing hardware)

🔑 Key Features

• Direct bolt-on big bore cylinder with +2.00 mm overbore; no machine work required

• Nickel-silicon carbide-plated cylinder sleeve for enhanced durability and long life

• Includes matched Vertex pistons for longevity, performance, and reduced engine noise

• Virtually identical appearance to OEM cylinders

• Made in the U.S.A.

• Compatible with 90.00 mm bore and 365 cc displacement

• 13.5:1 compression ratio, 4-cycle engine

• Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

📦 Fitment (Highlights)

• KTM:

  • 2011-2012 350 SX-F

  • 2011-2012 350 XC-F

• Notes: Always verify fitment by year, make, model, and engine specifications before ordering. Replaces OEM part number: 77230138000.

💲 Price & SKU

• Retail Price: $909.95

• SKU: 0931-0410 / 51001-K01

• Note: We price-match reputable online stores—contact us for the best price!

• Weight: 3.64 lbs

• Dimensions: 6.57" (H) × 11.53" (L) × 8.62" (W)

• Availability: In stock. Ships next business day

🛡️ Warranty

• Contact Cylinder Works for warranty details (proof of purchase required)

🔧 Installation Tips

• Torque cylinder head bolts to KTM specs (~25-30 ft-lbs, consult manual).

• Re-jet carburetor (e.g., Keihin PWK 35mm) for increased displacement—start with richer mains (e.g., 165-170).

• Verify cam timing and check for adequate oiling due to higher compression.