Crankshaft Assembly

Get OEM-fit reliability with a complete, ready-to-install crankshaft assembly. The Hot Rods Crankshaft Assembly is designed for riders and builders who want dependable bottom-end performance without delays or guesswork during rebuild time. It comes factory assembled and precisely trued to OEM specifications, helping your engine run smoothly and last longer under real riding loads.

Whether you’re refreshing a worn bottom end or rebuilding after a failure, this assembly saves time by arriving complete and installation-ready. Built with proven Hot Rods connecting rod components and quality gears, it’s made to meet—or exceed—OEM performance and durability standards, while remaining fully rebuildable for long-term value.

Key features:

• ✅ Sold complete with original proven Hot Rods connecting rods, top-end bearings (unless otherwise noted) and crankshaft webs
• ✅ Factory assembled and trued to OEM specifications; meets or exceeds OEM in performance and durability
• ✅ Complete and ready for installation; rebuildable with genuine Hot Rods rods and bearings (unless otherwise noted)

Benefits of use:

• 🔹 Faster rebuilds: complete assembly reduces parts sourcing and assembly time
• 🔹 Confidence in fit and smooth running: trued to OEM specs for correct alignment
• 🔹 Long-term serviceability: fully rebuildable with genuine Hot Rods components

Technical specifications (where applicable):

• 📌 Brand: HOT RODS
• 📌 Vendor part number: 4427
• 📌 Application: 250 cc, 4-cycle
• 📌 Type: OEM Stroke
• 📌 Stroke length: 53.60 mm
• 📌 Material: 4140 steel (steel finish)
• 📌 Connecting rod side clearance: 0.15 mm – 0.65 mm
• 📌 Gear quality: DIN class 9 or higher

Why choose this product?

• ⭐ OEM-spec truing and assembly for reliable bottom-end performance
• ⭐ Proven Hot Rods components and quality manufacturing standards
• ⭐ Installation-ready assembly that helps get your bike back on the track/trail sooner