Hot Rods 421-4144 +4 mm Stroker Crank – Raptor 660 (719 cc w/ 102 mm)
Yamaha Raptor 660 Complete Crankshaft Assembly – Hot Rods 421-4144 (+4 mm Stroker)
Give your Raptor 660 serious torque with the Hot Rods +4 mm stroker crank. Factory-assembled and trued to OEM specs, this crank is ready to drop in and built for long-term reliability—fully rebuildable with genuine Hot Rods components.
✅ What’s Included
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Complete crankshaft assembly (+4 mm stroke)
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Hot Rods connecting rod
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Main bearings (where applicable)
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Crank webs, fully assembled & trued
📦 Fitment
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Yamaha YFM660R Raptor (2001–2005)
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Also used in other Yamaha 660-based engines (verify application)
🛡️ Warranty Info
Backed by the manufacturer’s warranty against defects in materials and workmanship.
🔑 Key Features
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+4 mm stroker increases stroke for more torque and acceleration
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Factory assembled, dynamically balanced, and trued to OEM specifications
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Rebuildable with genuine Hot Rods rods and bearings
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CNC-machined components for excellent durability
📏 Displacement Notes (Read Before You Buy)
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With stock 100 mm bore: final displacement ≈ 691 cc
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With 102 mm big-bore top end (not included): final displacement ≈ 719 cc
719 cc result is the popular 102 mm bore + +4 mm stroke combo on the Raptor 660.
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
