Automotive

The Best Powersports Crank Shafts

This post contains affiliate links. As an Amazon Associate we earn from qualifying purchases.

Our picks are based on Amazon bestseller rankings, verified customer ratings, and product availability. We update our recommendations regularly to ensure accuracy.

A crankshaft is the heart of your powersports engine, translating the linear motion of pistons into rotational force. Selecting the right crankshaft is crucial for optimizing performance, ensuring reliability, and achieving the desired power output for your motorcycle, ATV, or other powersports vehicle.

No. 1
TOP IMSLCHR Crankshaft Compatible with Honda Foreman 520 TRX520 500 TRX500 Pioneer 500 SXS500 520 SXS...
  • OE/Part number:13000-HR5-CC0, 13000-HR3-A40, 91001-HM7-008, 91002-HP5-60
  • Fitment:Compatible wtih HONDA FOREMAN 500 TRX500 / SXS 500 2014-2019 HONDA FOREMAN 520 TRX520 / SXS 520 2020-2024 HONDA PIONEER 500 2015-2023 HONDA PIONEER 520 2021-2023 2025 HONDA RANCHER 420 TRX420 2014-2002
  • Material:Steel
  • WARRANTY:180 DAYS 100% Brand New,never used or installed
  • Package Includes:1 x Crankshaft
No. 2
Motion Pro Crank Shaft Puller
  • Motion Pro Crank Shaft Puller
SaleNo. 3
All Balls Racing Crank Shaft Seal Kit 24-2017 Compatible with/Replacement for Yamaha YZ250 2001-2018, YZ250X...
  • Specs: Crank Shaft Seal Kit, Double lip seals with PTFE contact area tolerate dry start conditions with less crankshaft pin wear.
  • Meets or Exceeds OEM Specs for Fit and Performance
  • Compatible With/Replacement For: Yamaha YZ250 2001 - 2019, YZ250X 2016 - 2019
  • 1-year warranty protects you after your purchase. We're confident that our products will work flawlessly once installed in your vehicle. In the rare case that it does not, we'll replace it anytime within one year of your order. If you have a problem, we...
  • 100% New aftermarket Crank Shaft Seal Kit built to meet OEM specifications
No. 4
Crankshaft Oil Seal Replacement Compatible with Kohler Engines – Powersports Seals, Oil Seals by Size...
  • Effective Oil Leakage Prevention This crankshaft seal is designed to maintain proper engine lubrication by forming a reliable seal and preventing oil leaks during operation.
  • Wide Engine Compatibility Fits Kohler engines CH18–CH26, CH620–CH752, CV18–CV25, CV620–CV752, SV710–SV840, ZT710–ZT740, and additional supported models.
  • Direct OEM Replacement Replaces part numbers 25-032-06-S, 52-032-08-S, and 055-608, allowing accurate selection for engine repair and maintenance.
  • Powersports Seals Application Suitable for small engines, lawn equipment, and powersports applications requiring dependable crankshaft sealing performance.
  • Oil Seals by Size – Easy Installation Precision-sized oil seal ensures proper fit and straightforward installation without modification.
No. 5
CLQWIAS Front Left Right Window Crank Handle Black for Freightliner for Classic 2003-2007 for Classic XL...
  • Fitment:for Freightliner,for Classic 2003-2007,for Classic XL 2003-2007,for FLD112 1995-1996,for FLD120 1991-1996
  • Part Number:A18-18557-000
  • Location: Front,Left,Right
  • Quantity:2 Piece
  • Color:Black
No. 6
All Balls Racing 24-2015 Crank Shaft Seal Kit
  • Specs: Crank Shaft Seal Kit, Double lip seals with PTFE contact area tolerate dry start conditions with less crankshaft pin wear
  • Meets or Exceeds OEM Specs for Fit and Performance
  • Compatible With/Replacement For: Yamaha YZ125 2001 - 2004
  • 1-year warranty protects you after your purchase. We're confident that our products will work flawlessly once installed in your vehicle. In the rare case that it does not, we'll replace it anytime within one year of your order. If you have a problem, we...
  • 100% New aftermarket Crank Shaft Seal Kit built to meet OEM specifications
SaleNo. 7
Moroayop Motorcycle Moped Crank Crankshaft Truing Stand Runout Measurement Tool with Long Track Base & Steel...
  • Innovative Sliding Base with Locking Rail System – Features a built-in sliding base with secure locking rails, providing unparalleled stability and vibration-free operation during precision crankshaft truing and runout measurement
  • Wide Engine Compatibility – Designed for a vast range of small single-cylinder engines, including Honda Z50/CT70 series, dirt bikes, pit bikes, scooters, mopeds, and models from Yamaha, Suzuki, and other major brands
  • Solid All-Steel Construction & Smooth Bearing Posts – Built with heavy-duty steel and equipped with high-quality roller bearing posts for buttery-smooth rotation, ensuring accurate and repeatable measurements every time
  • Simplified, Tool-Free Setup for Any Workspace – The integrated base eliminates loose parts or complex mounting. Simply place it on your bench and start working—no magnets, clamps, or extra hardware needed
  • Professional-Grade Tool for Home Garage & Shop – Whether you're rebuilding a vintage motorcycle or maintaining a modern dirt bike, this stand offers shop-level stability and precision for both 2-stroke and 4-stroke crankshafts
No. 8
Motorcycle Crankshaft Crank Shaft Emission Version Engine Fit For YBR125 TTR125 JYM 125(Euro I)
  • Compatibility:Emission version motorcycle engine crankshaft system
  • Configuration:Crankshaft (Emission version)
  • Function:Converts piston reciprocating to power for vehicle drive
  • Performance:Good dynamic balance, smooth running with low vibration, meets emission standards for eco-friendliness
  • Installation: spec fit, direct replacement
SaleNo. 9
All Balls Racing 24-2007 Crank Shaft Seal Kit
  • Specs: Crank Shaft Seal Kit, Double lip seals with PTFE contact area tolerate dry start conditions with less crankshaft pin wear
  • Meets or Exceeds OEM Specs for Fit and Performance
  • Compatible With/Replacement For: Honda CR80R 1985 - 2002, CR80RB 1996 - 2002, CR85R 2003 - 2007, CR85RB 2003 - 2007
  • 1-year warranty protects you after your purchase. We're confident that our products will work flawlessly once installed in your vehicle. In the rare case that it does not, we'll replace it anytime within one year of your order. If you have a problem, we...
  • 100% New aftermarket Crank Shaft Seal Kit built to meet OEM specifications

Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API

How to Choose the Best Powersports Crank Shafts

Understanding Crankshaft Types

Crankshafts come in several primary types, each suited for different applications. Forged crankshafts are generally stronger and more durable, ideal for high-performance or racing engines where stress is a significant factor. Cast crankshafts are more common in stock or recreational applications due to their lower cost and sufficient strength for standard operating conditions. Some may also encounter billet crankshafts, which are machined from a solid block of metal for extreme strength and customization, often found in highly modified engines.

Key Specifications to Consider

When choosing a new crankshaft, several specifications are paramount. Stroke length directly affects engine displacement and power delivery; a longer stroke generally increases torque. Rod journal diameter and main bearing journal diameter must match your engine's specifications for proper fitment and oil flow. Material (forged, cast, billet) dictates strength and longevity. Finally, ensure the crankshaft is compatible with your engine's balance factor, which is critical for smooth operation and preventing excessive vibration.

Compatibility and Fitment

The most critical aspect of purchasing a crankshaft is ensuring it is compatible with your specific powersports vehicle and engine model. Always consult your vehicle's service manual or the crankshaft manufacturer's specifications to verify fitment. Pay close attention to the year, make, model, and engine size. Using an incompatible crankshaft can lead to severe engine damage and operational failure.

Performance Goals and Durability

Your intended use for the vehicle should heavily influence your choice. For daily riding or recreational use, a high-quality cast or standard forged crankshaft may suffice. If you plan on competitive racing, aggressive off-roading, or significant engine modifications, investing in a robust forged or billet crankshaft is highly recommended to withstand the increased stresses and demands.

Frequently Asked Questions

What is the difference between a forged and a cast crankshaft?
Forged crankshafts are made by heating metal and shaping it under extreme pressure, resulting in a denser, stronger grain structure. Cast crankshafts are made by pouring molten metal into a mold, which is generally less dense and can be more brittle.
How does stroke length affect engine performance?
A longer stroke length increases the distance the piston travels, which generally leads to a larger engine displacement and increased torque. A shorter stroke typically allows for higher engine RPMs and can contribute to more horsepower at higher speeds.
Can I use a crankshaft with a different stroke length than my original?
While technically possible with significant modifications, it's generally not recommended for standard replacements. Changing the stroke length affects piston speed, compression ratio, and overall engine geometry, requiring other component changes to function correctly and safely.
What does the balance factor mean for a crankshaft?
The balance factor refers to how the crankshaft is weighted to counteract the forces generated by the pistons and connecting rods. An incorrect balance factor can lead to excessive engine vibration, premature bearing wear, and potential component failure.
How do I know if my crankshaft needs replacement?
Signs of a failing crankshaft include knocking or grinding noises from the engine's lower end, excessive vibration, oil pressure issues, or visible damage upon engine inspection. A mechanic can perform tests to diagnose crankshaft problems.