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Replacement piston kit for selected Yamaha 400 Big Bear / Kodiak models (1993–2012) — WSM 50-541K / 4GB-11631-00-Y0.
Product Details
Brand
WSM
Part Number
50-541K
Product Type
Piston Kit
Application
Yamaha
Available Sizes
Choose standard or over-size bore: Standard Bore, .25mm Over, .5mm Over, .75mm Over, 1.00mm Over, 1.5mm Over. Select the WSM SKU that matches your engine bore.
Option
Bore
WSM SKU
Standard (this listing)
83.00 mm
50-541K
+0.25 mm
83.25 mm
50-541-04K
+0.50 mm
—
50-541-05K
+0.75 mm
83.75 mm
50-541-06K
+1.00 mm
84.00 mm
50-541-07K
+1.50 mm
84.50 mm
50-541-09K
OEM References
4GB1163100Y0
Fitment
Fits selected Yamaha models — see table below.
Yamaha
Model
Engine
Years
Big Bear Buckmaster
400
2000
Big Bear Exploring
400
2007
Big Bear Hunter
400
2007–2012
Big Bear Real Tree
400
2001–2002
Big Bear
400
2000–2012
Kodiak
400
1993–1999
Fitment confirmation: Please confirm suitability using the OEM references, fitment guide and product images before ordering.
