What do you get when you shove a 600cc thumper into a 4X4 ATV chassis? Well the answer to that is an exciting new sub-genre of super powered mud machines. Until the introduction of the 1998 Yamaha Grizzly 600 there were only two options of Grizzlys, a 250cc or 350cc. These smaller quads wouldn't stand a chance against todays massive mud machines. Being the first large ATV created a cult like following for the Grizzly 600, and it remains one of the most popular ATV's on the trails today. Yamaha used the Ultramatic transmission as the method of power transfer for the Grizzly. Belt driven CVT transmissions are common on most ATV’s nowadays but the Engine Compression Braking was something new in 1998. Yamaha created a new clutch system that allowed the rider to use the torque from the motor to slow the ATV on steep downhills instead of burning up the brake pads. To keep the sport side of the Sport Utility crowd happy Yamaha installed an electronic On-Command four wheel drive button. This little button allowed the rider to use the Grizzly like a sport ATV with quick and light steering.
With the rise in popularity for Mud-Bogging ATV's, tires have dramatically increased in size and aggressiveness. With tires available in up to 32" with 2.5" of tread controlling the Supersize ATV's has become quite a chore. In 2007 Yamaha introduced the Grizzly 700 with the first available (EPS) Electronic Power Steering so you could steer oversized tires without having to bench-press 400lbs.
Q. How Do you know what Yamaha Grizzly to select when ordering my parts and what do all those letters mean?
A. Yamaha uses the prefix YFM for most of the ATV's followed by the engine size, 2x4 or 4x4 ,model name (Grizzly, Bear Tracker Bruin), rear suspension type (straight axle, IRS), production year and color of fenders.
Using the 2009 Grizzly 350 models we can break down the model number to show what each of the letters in the Model number represent and some common differences.
GRIZZLY 350 2x4 (YFM35GYGR)
YFM = Yamaha ATV
35 = 350cc engine
G = Grizzly
Y = 2009 Production Year
GR = Green
GRIZZLY 350 4x4 (YFM35FGYGR)
YFM = Yamaha ATV
35 = 350cc engine
F = 4 Wheel Drive
G = Grizzly
Y = 2009 Production Year
GR = Green
GRIZZLY 350 IRS 4x4 (YFM35FGIYG)
YFM = Yamaha ATV
35 = 350cc engine
F = 4 Wheel Drive
G = Grizzly
I = Independent Rear Suspension
Y = 2009 Production Year
GR = Green
Yamaha Grizzly Models
YFM80G = Grizzly 80
YFM125G = Grizzly 125
YFM30G = Grizzly 300
YFM35G = Grizzly 350 2X4
YFM35FG = Grizzly 350 4X4
YFM35FGI = Grizzly 350 4X4 Independent Rear Suspension
YFM45FG = Grizzly 450
YFM5FG = Grizzly 550
YFM600F = Grizzly 600
YFM660F = Grizzly 660
YFM66F = Grizzly 660
YFM7FG = Grizzly 700
Yamaha Grizzly Color Reference
B = Black
DU = Ducks Unlimited Edition
G = Green
GR = Green
GY = Gray
H = Hunter
L = Blue
R = Red
SP = Special Edition
SE = Special Edition
W = White
Yamaha Grizzly Common Acronyms
EPS = Electronic Power Steering
IRS = Independent Rear Suspension
FI = Fuel Injected
4X4 = 4 Wheel Drive
2X4 = 2 Wheel Drive
Yamaha ATV Model Year Letter Reference
Use the 10th letter in the VIN to establish the year model of the Yamaha Grizzly.
The 10th letter of the VIN will translate into a production model year.
1980 = G
1981 = H
1982 = J
1983 = K
1984 = L
1985 = N
1986 = S
1987 = T
1988 = U
1989 = W
1990 = A
1991 = B
1992 = D
1993 = E
1994 = F
1995 = G
1996 = H
1997 = J
1998 = K
1999 = L
2000 = M
2001 = N
2002 = P
2003 = R
2004 = S
2005 = T
2006 = V
2007 = W
2008 = X
2009 = Y
2010 = Z
2011 = A
2012 = B
2013 = D
2014 = E
Yamaha Grizzly Specs
Yamaha Grizzly 300 Specs
2012-2013 YFM 300
Front Tires 22x7x10
Rear Tires 22x10x9
Battery YTX12-BS
Spark Plug CR8-E0000-00-00 (CR8E)
Oil Filter 1SC-E4451-00-00
Air Filter 1SC-E4451-00-00
Yamaha Grizzly 350 Specs
2007-2011 YFM 350 2x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX14AH-BS
Spark Plug DR8-EA000-00-00 (DR8EA)
Oil Filter 5GH-13440-50-00
Air Filter 5UH-E4451-10-00
Yamaha Grizzly 350 Specs
2007-2013 YFM 350 4x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX14AH-BS
Spark Plug DR8-EA000-00-00 (DR8EA)
Oil Filter 5GH-13440-50-00
Air Filter 5UH-E4451-10-00
Yamaha Grizzly 350 Specs
2007-2011 YFM 350 IRS 4x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX14AH-BS
Spark Plug DR8-EA000-00-00 (DR8EA)
Oil Filter 5GH-13440-50-00
Air Filter 5UH-E4451-10-00
Yamaha Grizzly 400 Specs
2007-2008 YFM 400 4x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX20L-BS
Spark Plug DR8-EA000-00-00 (DR8EA)
Oil Filter 5GH-13440-50-00
Air Filter 5UH-E4451-10-00
Yamaha Grizzly 450 Specs
2007-2013 YFM 450 IRS 4x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX20L-BS
Spark Plug DR8-EA000-00-00 (DR8EA)
Oil Filter 5GH-13440-50-00
Air Filter 5UH-E4451-10-00
Yamaha Grizzly 550 Specs
2009-2013 YFM 550 4x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX20L-BS
Spark Plug LMA-R6A90-00-00 (LMAR6A-9)
Oil Filter 5GH-13440-50-00
Air Filter 1HP-E4451-01-00
Yamaha Grizzly 550 Specs
2009-2013 YFM 550 EPS 4x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX20L-BS
Spark Plug (LMAR6A-9)
Oil Filter 5GH-13440-50-00
Air Filter 1HP-E4451-01-00
Yamaha Grizzly 600 Specs
1998 YFM 600 4x4
Front Tires 25x8x12
Rear Tires 25x10x10
Battery YTX20L-BS
Spark Plug DP8-EA900-00-00 (DP8EA-9)
Oil Filter 4X7-13440-90-00
Air Filter 1UY-14451-00-00
Yamaha Grizzly 600 Specs
1999-2000 YFM 600 4x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX20L-BS
Spark Plug DP8-EA900-00-00 (DP8EA-9)
Oil Filter 4X7-13440-90-00
Air Filter 1UY-14451-00-00
Yamaha Grizzly 600 Specs
2001 YFM 600 4x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX20L-BS
Spark Plug DP8-EA900-00-00 (DP8EA-9)
Oil Filter 4X7-13440-90-00
Air Filter 1UY-14451-00-00
Yamaha Grizzly 660 Specs
2002-2008 YFM 660 4x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX20L-BS
Spark Plug DP8-EA900-00-00 (DP8EA-9)
Oil Filter 02-06 5GH-13440-30-00
Oil Filter 07-08 5GH-13440-50-00
Air Filter 1UY-14451-00-00
Yamaha Grizzly 700 Specs
2007-2008 YFM 700 FI EPS 4x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX20L-BS
Spark Plug (CPR7EA-9)
Oil Filter 5GH-13440-50-00
Air Filter 1HP-E4451-01-00
Yamaha Grizzly 700 Specs
2009-2013 YFM 700 FI 4x4
Front Tires 25x8x12
Rear Tires 25x10x12
Battery YTX20L-BS
Spark Plug (LMAR6A-9)
Oil Filter 5GH-13440-50-00
Air Filter 1HP-E4451-01-00
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