Hot Rods Stroker Crankshaft Assembly
1013-0924 (MFG #: 4240)
$923.31
Sale price
$923.31
Regular price
$923.31
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Hot Rods Stroker Crankshaft Assembly for Kawasaki KX85 Dirt Bike
Hot Rods Stroker Crankshaft Assembly for Kawasaki KX85 Dirt Bike
$923.31
Sale price
$923.31
Regular price
$923.31
SKU:1013-0924
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Description
FEATURES
- All new assembly sold complete with Hot Rods connecting rod
- Factory assembled and trued to OEM specifications, Hot Rods cranks will meet or surpass the OEM in performance
- Ready for installation
- "Stroker" cranskhaft assembly adds 1,5 mm to 5 mm of stroke depending on application; in some cases cylinder head must be modified or special pistons used (as noted)
- Crankshaft is completely rebuildable with genuine Hot Rods connecting rods
- Main bearings not included
Technical Specifications
- MFG. Part Number 4240
Vehicle Information
Kawasaki KX85 Dirt Bike (2001-2026)
The Kawasaki KX85, a cornerstone in youth motocross, has been a dominant force from 2001 to 2026. This high-performance dirt bike consistently features an 84cc two-stroke, liquid-cooled engine, designed to deliver crisp power for aspiring racers. Throughout its production, the KX85 has been offered in two primary configurations: the standard model with 17-inch front and 14-inch rear wheels, and the KX85L (or KX85 II) large-wheel variant, featuring 19-inch front and 16-inch rear wheels for taller riders. Over its long run, the KX85 has seen significant evolution. A major redesign in 2014 brought a retuned engine with a 17% horsepower increase, a redesigned chassis, updated suspension, and improved ergonomics including wider handlebars and petal disc brakes. Further substantial updates arrived in 2026, introducing new, highly rigid 43mm KYB inverted front forks, larger 240mm front and 220mm rear petal disc brakes, and enhanced ergonomics with Renthal Fatbar handlebars. The KX85L was also officially introduced to the US market that year, building on its availability in other regions since 2022. Q: How do I ensure this product fits my Kawasaki KX85?
A: To guarantee a perfect fit, please use the year and edition selector at the top of this page.
Maintenance
| Component | Interval | Details |
| Engine Oil (Transmission/Gear Oil) | 5 to 10 hours (recreational use); 3 to 5 hours or after every race (aggressive/race use) | The KX85 uses transmission/gear oil, as its two-stroke engine is lubricated by premixed fuel. Approximate capacity: 700 ml. |
| Oil Filter | Inspect and clean during oil changes | The KX85's two-stroke engine typically does not have a replaceable spin-on oil filter like a four-stroke engine, but rather a screen filter to be cleaned. |
| Belt | Not applicable | The Kawasaki KX85 is a chain-driven motorcycle and does not utilize a belt. |
| Spark Plug | Every 20 hours; 10 to 15 hours for aggressive/race use | More frequent replacement is necessary for a high-performance two-stroke engine. |
| Air Filter | Clean every 5 to 15 hours (standard/recreational use); every 2 to 3 hours or more frequently (dusty/muddy conditions) | Regular cleaning and oiling are critical for engine performance and longevity. |
| Coolant | Every 40 to 50 hours or at least once per year | Use coolant specifically formulated for aluminum radiators. |
| Valve Inspections (Power Valve System) | 20 to 30 hours (recreational use); 15 to 20 hours (aggressive/race use) | |
| Top-End Inspections (Piston, Cylinder, Head) | 30 to 50 hours (recreational use); 15 to 30 hours (aggressive/race use) | Some sources suggest piston and ring replacement every 20 hours, or 10 to 15 hours for racing. |
| Bottom-End Inspections (Crankshaft, Bearings) | 50 to 100 hours (recreational use); 25 to 50 hours (aggressive/race use) |
Maintenance intervals may vary by model year and riding conditions. It is essential to consult the official owner's manual for precise information.