660cc Crankshaft Assembly for Yamaha Grizzly YFM660 YXR660 5KM-11400 2002-2008
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
660cc Crankshaft Assembly for Yamaha
The 660cc crankshaft assembly for Yamaha is a crankshaft assembly for Yamaha Grizzly YFM660 and Yamaha YXR660 models from 2002-2008, referencing OEM part 5KM-11400. The 660cc crankshaft assembly is used for bottom-end repair and engine rebuild work.
Overview
This 660cc crankshaft assembly is for Yamaha Grizzly YFM660 and Yamaha YXR660 engines, covering the 2002-2008 model range. It serves as the rotating crankshaft within the engine and uses OEM cross-reference number 5KM-11400. Install this 660cc crankshaft assembly during a bottom-end rebuild or when replacing a damaged crankshaft.
Built For Performance
- Replacement assembly for 660cc Yamaha engines
- OEM cross-reference number 5KM-11400 for part matching
- Designed for Yamaha Grizzly YFM660 and Yamaha YXR660 applications
- Used in bottom-end service with proper seals and bearings
Fits These Machines
- for Yamaha Grizzly YFM660 (2002-2008)
- for Yamaha YXR660 (2002-2008)
On-The-Job Use
- Rebuilding a Yamaha Grizzly 660 engine after crankshaft wear
- Restoring a Yamaha YXR660 vehicle after crankshaft failure
- Completing a bottom-end job with new bearings, seals, and engine oil
Specs At A Glance
| Part Number(s) | 5KM-11400 |
| Displacement | 660cc |
| Fitment | For Yamaha Grizzly YFM660 and Yamaha YXR660 |
| Years | 2002-2008 |
Good To Know
Q: Is this crankshaft assembly for the Yamaha Grizzly YFM660? A: Yes, it is listed for the Yamaha Grizzly YFM660 and Yamaha YXR660 from 2002 to 2008. Confirm the crank number on the engine before ordering.
Q: What does the part number 5KM-11400 do? A: The part number 5KM-11400 is an OEM cross-reference that helps identify this crankshaft assembly for Yamaha 660cc engines. Check it against the original parts diagram before purchase.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.