981 / 1410
EXHAUST
TIRES
TUBES
TIRE
ACCESSORIES
BIKE
ACCESSORIES
SNOWBIKE
PITBIKE
GRAPHICS /SEAT
BODY
CONTROLS
BARS /GRIPS
LEVERS
CABLES
INTAKE
FUELSYSTEMS
AIR FILTERS
OIL FILTERS
ELECTRICAL
SPARKPLUGS
BATTERIES
CHARGERS
ENGINE
PISTONS
SUSPENSION
DRIVE
CHAIN
SPROCKETS
BRAKES
CHEMICALS
GASCANS
TOOLS
LOCKS
RAMPS /STRAPS
TRAILERS
PROMOTIONAL
REFERENCE
INDEX
x
X
X
X
X
981
• Manufactured from 7075 T6-51 aluminum
• Stronger than steel sprockets in tensile, yield and shear
strength. (See chart)
• Far lighter than steel for less unsprung weight
• Made from full thickness aluminum for maximum strength
• Available in a full range of tooth sizes
STANDARD
REAR MX
• The finest countershaft sprocket manufactured in the world
• Far exceeds the critical requirements of today's high horsepower bikes
• Manufactured from steel alloy approaching 200,000 psi yield
• CNC machined from high grade alloy steel
• Meets or exceeds OEM specifications
• Heat treated for long life and less wear
• Broached specially for maximum spline to shaft contact
• Available in a full range of tooth sizes
OEM REPLACEMENT
REAR SPROCKETS
Material
Brinell
Hardness
Plain Aluminum
6061-T6
95
Mild Steel
1010
116
PBI’s aircraft alloy aluminum
7075-T6-51
150
COUNTERSHAFT SPROCKETS
REPLACEMENT COUNTERSHAFT SPROCKET CLIPS
(ACTUAL SIZE)
MADE IN THE USA BY THE PROS
FOR THE PROS
Desc.
WPS # List
Small Clip
50-006 $.95
90
80
70
60
50
40
30
20
10
STRONGER THAN STEEL
ENDURANCE
LIMIT
SHEAR
STRESS
YIELD
STRENGTH
TENSILE
STRENGTH
ALUMINUM
ALUMINUM
ALUMINUM
ALUM
STEEL
STEEL
STEEL
STEEL
PBI - PBI - PBI - PBI - PBI
PBI - PBI - PBI - PBI
PBI - PBI -
PBI -
Desc.
WPS # List
Medium Clip
50-007 .95
Desc.
WPS # List
Large Clip
50-008 .95
SPROCKETS