PROX Crankshaft Bearing and Seal Kit for YAMAHA YFZ BANSHEE 350 1987-2006

On YAMAHA YFZ BANSHEE 350 from 1987 to 2006, the PROX 23.CBS23087 crankshaft bearing and seal kit fits in place of the original part. When you rebuild a bottom end, the crankshaft bearings and oil seals are replaced together. This kit groups them under one part number.

Specifications

• Brand: PROX
• Manufacturer part number: 23.CBS23087

When to replace it?

• Rumbling that changes with the revs, unusual vibration.
• Radial or side play in the crankshaft.
• Leak at the crankshaft oil seals.

Every time the connecting rod or crankshaft is replaced, and at the intervals in the service manual.

Fitting tips

1. Heat the crankcase halves (around 100 to 120 °C) to remove and fit the bearings without force; put the new bearings in the freezer to help them go in.
2. Never hit the outer race of a bearing mounted on the shaft, or the inner race of a bearing mounted in the crankcase.
3. Fit the oil seals perfectly square, with greased lips.
4. Close up with a complete engine gasket kit and check that the crankshaft turns freely.
5. Take the opportunity to check the gearbox bearings and refill with fresh oil.

Why PROX?

ProX Racing Parts has been supplying engine and clutch parts to motocross riders since 1975, from its headquarters near Amsterdam. According to its catalogue, most of its parts are made in Japan, by manufacturers that also produce parts for the Japanese motorcycle makers.

Spare parts and items to plan

• Complete engine gasket kit : see the selection
• Gearbox bearings : see the selection
• Connecting rod kit : see the selection
• Gearbox oil : LIQUI MOLY 10W30 1 L · LIQUI MOLY 500 ml

Frequently asked questions

Are the oil seals included?
Yes: the kit contains the crankshaft bearings and oil seals.

What should I replace at the same time?
The complete engine gasket kit and, if the engine has some hours on it, the connecting rod.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
YAMAHA YFZ BANSHEE 350 2006
YAMAHA YFZ BANSHEE 350 2005
YAMAHA YFZ BANSHEE 350 2004
YAMAHA YFZ BANSHEE 350 2003
YAMAHA YFZ BANSHEE 350 2002
YAMAHA YFZ BANSHEE 350 2001
YAMAHA YFZ BANSHEE 350 2000
YAMAHA YFZ BANSHEE 350 1999
YAMAHA YFZ BANSHEE 350 1998
YAMAHA YFZ BANSHEE 350 1997
YAMAHA YFZ BANSHEE 350 1996
YAMAHA YFZ BANSHEE 350 1995
YAMAHA YFZ BANSHEE 350 1994
YAMAHA YFZ BANSHEE 350 1993
YAMAHA YFZ BANSHEE 350 1992
YAMAHA YFZ BANSHEE 350 1991
YAMAHA YFZ BANSHEE 350 1987