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40 Tooth Rear Steel Sprocket For 520 Chain - JTR853.40

  • Part #:
    8109940S
  • Mfg Part #:
    JTR853.40
  • OEM/Ref#:
1 / 3

40 Tooth Rear Steel Sprocket For 520 Chain - JTR853.40

  • Part #:
    8109940S
  • Mfg Part #:
    JTR853.40
  • OEM/Ref#:
MSRP: $24.95

Price: $22.46 10% off!
Number of Teeth
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JT Sprockets 40 Tooth Rear Steel Sprocket For 520 Chain - JTR853.40
  • Maximum strength sprockets at minimum weight
  • Rear sprockets made with C49 high-carbon steel
  • Each sprocket is heat treated and sandblasted to lower material surface tension
  • Meet or exceed the highest-quality compound standards set by the motorcycle industry

NOTE:
We display every sprocket that fits the machine selected. Be sure the tooth count matches your application for OEM sizing. When changing sprocket sizes be sure to check clearances and chain length. If you need the standard tooth size information or chain size and length, call us toll-free 800-969-7504

Anytime you use other than the standard front/rear sprocket sizes, clearance must be checked.

When converting to a smaller chain size, especially for racing, be sure to use the highest-grade O-ring chain available (Heavy-duty non-O-ring acceptable for drag racing.)



Included Items:

(1) 40 Tooth steel rear sprocket for 520 chain
No instructions

Specifications
Chain Size 520
Material Steel
Mfg #: JTR853.40
Number of Teeth 40
Part #: 8109940S
Type Sprocket - Rear
Units Each
Weight 1.18 lbs
Alternate/OEM Part Number(s):
JTR85340
UPC Code:
824225309058
Fitment for JT Sprockets 40 Tooth Rear Steel Sprocket For 520 Chain - JTR853.40

Part 8109940S fits the following machines

Yamaha
  • DT400 1977-1978
  • IT175 1980-1983
  • IT200 1984-1986
  • IT250 1977-1983
  • IT400 1976-1979
  • IT425 1980
  • IT465 1981-1982
  • IT490 1983-1984
  • MX250 1975
  • MX400 1975
  • TT350 1986-1987
  • TT500 1976-1981
  • TT600 1983-1987
  • TT-R250 1999-2006
  • WR250Z 1991-1997
  • WR400F 1998
  • WR500Z 1992-1993
  • XT350 1985-1995
  • XT500 1976-1981
  • YFM350X Warrior 1989-2004
  • YFM660R Raptor 2001-2005
  • YFM660RLE Raptor Limited Edition 2002-2005
  • YFS200 Blaster 1988-2006
  • YFS200SE Blaster Special Edition 2006
  • YFZ350 Banshee 1989-2006
  • YFZ350LE Banshee Limited Edition 2003-2005
  • YFZ350SE Banshee Special Edition 2005-2006
  • YFZ350SP Banshee 50th Anniversary Edition 2006
  • YTZ250 Tri-Z 1985-1986
  • YZ100 1982-1983
  • YZ125 1980-1998
  • YZ250 1974-1998
  • YZ250WR 1989-1990
  • YZ360 1974-1975
  • YZ400 1976-1979
  • YZ400F 1998
  • YZ465 1980-1981
  • YZ490 1982-1990
Reviews & Questions
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Browse 2 questions Browse 2 questions and 5 answers
I own a 1992 Yamaha XT 225 it has a 45 tooth rear rocket The bike really revs out about 60 miles an hour I want to change it to a 43 tooth to give it a little bit more top end. Is my thinking right?Please help
Old man on Oct 26, 2018
BEST ANSWER: I’m the one who asked that question... this is what happened, I spoke to lance at sprocket specialist and he really went over all Angels with me and he sounded like he really cared new want I wanted. He suggested going with a 40 tooth and listen to this he nailed it! 43 tooth would not have been enough the 40 tooth worked excellent now just by the feel of the bike I could usually guess about what speed I was dewing now when I look at speedometer I’m going about 10 mph faster and before I couldn’t use 1st gear by the time I hit the crosswalk I’d be in 2nd gear now 100% better now it feels right . It was a inexpensive fix.. thanks sprocket specialist
Is the JTR853 48 tooth available in silver/steel?
A shopper on Apr 1, 2020
BEST ANSWER: No
5.0 / 5.0
6 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
6
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0
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Fit
4.8 / 5
Quality
4.8 / 5
Style
4.7 / 5
Value
5.0 / 5
Fit
5 / 5
Quality
5 / 5
Style
5 / 5
Value
5 / 5
No Review Title Entered By User
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August 17, 2010
Fit
4 / 5
Quality
4 / 5
Style
4 / 5
Value
5 / 5
Great Product for the money!!!!!
This is a great sprocket choice for the finacialy savy shopper works great put a ton of miles on it so far with no wear yet
January 21, 2010
Port Wing, WI
Fit
5 / 5
Quality
5 / 5
Style
4 / 5
Value
5 / 5
great product
you couldn't ask for anything to fit any better or go on any easier.
June 15, 2011
Fit
5 / 5
Quality
5 / 5
Style
5 / 5
Value
5 / 5
Great gear fro the value
This part is well made with a nice finish all over and the fit on the machine was really nice also. And the price for this is very reasonable Its such a good price I would by several other sizes of these sprockets to do some testing if I had the free time coming up Very happy with this purchase
August 25, 2010
Fit
5 / 5
Quality
5 / 5
Style
5 / 5
Value
5 / 5
No Review Title Entered By User
No Review Text Entered By User
February 4, 2011
Fit
5 / 5
Quality
5 / 5
Style
5 / 5
Value
5 / 5
durable
these sprockets are durable i accidently hit it with a rubber mallet sumwhat hard and it didnt bend at all
December 13, 2010