The Hot Rods 4031 complete crankshaft is a dependable replacement for the original crankshaft in 2009–2018 KTM 65 SX models. Designed as a cost-effective alternative to a costly OEM crankshaft, this assembly is supplied complete and ready for installation with proven Hot Rods connecting rods, top-end bearings, and crankshaft webs. It is factory assembled and trued to OEM specifications to provide reliable fitment, performance, and durability.
Manufactured by Hot Rods, the 4031 crankshaft is fully rebuildable using genuine Hot Rods connecting rods and bearings, helping simplify future engine service. Precision-manufactured gears meet DIN Class 9 or higher quality standards for consistent operation and long-term dependability. This crankshaft is engineered for direct replacement in the listed KTM application and is intended for riders and technicians seeking reliable internal engine components without unnecessary modifications.
Fitment includes 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, and 2018 KTM 65 SX motorcycles. Confirm the model year and engine configuration before ordering. The manufacturer part number is 4031, and the vendor part number is 421-4031.
Features:
- Complete crankshaft assembly ready for installation
- Premier alternative to a costly OEM crankshaft
- Includes Hot Rods connecting rods, top-end bearings, and crankshaft webs
- Factory assembled and trued to OEM specifications
- Designed to meet or surpass OEM performance and durability
- Fully rebuildable with genuine Hot Rods connecting rods and bearings
- Gears manufactured to DIN Class 9 or higher quality standards
- Fits 2009–2018 KTM 65 SX models
- Manufacturer part number: 4031
- Vendor part number: 421-4031
Fitment:
2009 KTM 65 SX
2009 KTM 65 XC
2010 KTM 65 SX
2011 KTM 65 SX
2012 KTM 65 SX
2013 KTM 65 SX
2014 KTM 65 SX
2015 KTM 65 SX
2016 KTM 65 SX
2017 Husqvarna TC 65
2017 KTM 65 SX
2018 Husqvarna TC 65
2018 KTM 65 SX
2019 Husqvarna TC 65
2019 KTM 65 SX
2020 Husqvarna TC 65
2020 KTM 65 SX
2021 Gas-Gas Mc 65
2021 Husqvarna TC 50
2021 KTM 65 SX
2022 Gas-Gas Mc 65
2022 Husqvarna TC 65
2022 KTM 65 SX
2023 Gas-Gas Mc 65
2023 Husqvarna TC 65
2023 KTM 65 SX