Hot Rods Crankshaft Assembly 2000-2024 Suzuki DR-Z400 LT-Z400 KFX400 - 4059

Heavy-Duty Bottom End Performance 

When it comes to a complete engine overhaul, the crankshaft is the heart of your machine. The Hot Rods 4059 Crankshaft Assembly, available at Moto-House MX, is a high-performance, heavy-duty solution designed to replace your worn factory crank. Engineered for the rugged demands of dual-sport, off-road, and ATV riding, this assembly provides the structural integrity and precision balance required to keep your 400cc engine running smooth and vibration-free under the most punishing conditions.

Forged from premium 4140 steel, every Hot Rods assembly is factory assembled and trued to exact OEM specifications, meeting or exceeding original equipment in both performance and durability. This kit arrives complete and ready for installation, featuring proven Hot Rods connecting rods and high-quality top-end bearings. With gears manufactured to a DIN Class 9 quality level or higher, this rebuildable crankshaft is built to deliver maximum power transfer and long-term reliability for your Suzuki or Kawasaki powerplant.

Top Features: Hot Rods 4059 Crankshaft Assembly

• Factory Trued & Ready: Pre-assembled and trued to OEM tolerances for a direct, "drop-in" installation.
• Premium 4140 Steel: High-tensile strength material ensures the crankshaft webs can handle the high-torque loads of performance 4-strokes.
• Proven Connecting Rods: Sold complete with original Hot Rods rods and top-end bearings for a comprehensive bottom-end refresh.
• Precision Gear Quality: Timing and drive gears are made to DIN Class 9 standards or higher for smooth, quiet operation.
• Fully Rebuildable: Designed for longevity; the assembly can be completely rebuilt with genuine Hot Rods rods and bearings in the future.

Expert Pro-Tip

When installing a new crankshaft, it is the perfect time to replace your main bearings and transmission seals to ensure the entire bottom end is perfectly sealed and supported for its next life cycle.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2000-2024	Suzuki	DR-Z400 / S / SM / E
2003-2014	Suzuki	LT-Z400 QuadSport Z
2003-2006	Kawasaki	KFX400 / KLX400R
2004-2008	Arctic Cat	DVX 400

Frequently Asked Questions

Q: Is this crankshaft balanced?
A: Yes, every Hot Rods assembly is precision-trued and balanced to meet or exceed factory specifications before it leaves the factory.

Q: Does this include the main bearings?
A: No, this is the crankshaft assembly itself (including the connecting rod). We highly recommend purchasing a Hot Rods Main Bearing and Seal kit to complete your installation.

Q: Is this a "stroker" crank or stock stroke?
A: This specific part number (4059) is an OEM stroke assembly (62.60 mm), maintaining your engine's original displacement and characteristics.

Closing CTA: Build a bottom end you can trust. Buy the Hot Rods 4059 Crankshaft Assembly now at Moto-House MX.

Stop by our local store in Montverde, FL or lightning-fast shipping across the USA.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The Best Motocross/UTV & ATV Shop in Central Florida.