CRANKSHAFT ASSY YFM350 WARRIOR, Must Use Vertex Piston 23616A, HOTRODS 8-4143 YAMAHA ATV

The Hot Rods Heavy-Duty (+4mm Stroke) Crankshaft Assembly 4143 is a performance-oriented replacement for Yamaha YFM350R Raptor and YFM350X Warrior models. With a +4mm stroke, it increases displacement to 379cc, providing enhanced power and torque. This crankshaft is factory-assembled, trued, and ready for installation, ensuring precision and reliability. It requires the use of the Vertex Stroker piston (23616A) for proper compatibility.

Features:

• Heavy-duty crankshaft assembly with a +4mm stroke for increased displacement (379cc).
• Factory-assembled and trued to within .001 inches for accuracy and balance.
• Includes Hot Rods connecting rod, MAG (LH) crank bearing, and inner crankshaft webs.
• Completely rebuildable for extended service life.
• Ready for installation, delivering hours of dependable performance.
• Requires Vertex Stroker piston (23616A) for compatibility.

Compatible Models:

Yamaha YFM350R Raptor (2004–2013):

• 2004 Yamaha YFM350 Raptor
• 2005–2013 Yamaha YFM350R Raptor
• 2005–2007 Yamaha YFM350RSE Raptor Special Edition
• 2007 Yamaha YFM350RSE2 Raptor Special Edition 2

Yamaha YFM350X Warrior (1987–2004):

• 1987–2004 Yamaha YFM350X Warrior

Part Number: 56-208.HR.4mm

Dispatch Times

Local Stock: Dispatches in < 24 hours

Parts showing as available at our Warehouse in Gorey ship the same business day if ordered before 1pm. 

Supplier Stock: Dispatches in 2-4 Days

Parts showing as available at our Supplier Warehouse are ordered from our supplier and delivered to us before we can dispatch. More info is available on this page under "Stock Availability".

OEM Special Order: Dispatches in 3-10 Days

This website does not have access to live stock levels from our OEM Suppliers. In most cases the parts will be available but in the case of backordered parts we will notify you. We receive parts from Yamaha in 3-4 days, All others including Honda, Suzuki, Kawasaki, Polaris please allow 7-10 days for us to receive the parts. 

Delivery Times

Ireland & Northern Ireland:

1-2 Days using GLS/An Post

Germany, France, Netherlands, Belgium:

3-5 Days using GLS/Fedex

Italy, Spain & Other EU Countries:

4-7 Days using GLS/Fedex