JT Sprockets 39 Tooth Rear Sprocket JTR857.39
- Brand: JT Sprockets
- Position: Rear
- Tooth Count: 39
- JT Part Number: JTR857.39
- Type: Standard
- Material: Steel
- Fitment: Direct replacement for OEM sprocket (check bike fitment before ordering)
JT Sprockets are trusted worldwide for high-quality motorcycle drivetrain components. This sprocket is precision manufactured for accurate fitment, smooth power delivery, and long service life.
Made from durable materials and finished for corrosion resistance, it is designed as a direct replacement for the original sprocket. Suitable for standard replacement or gearing changes when selecting an alternative tooth count.
Please confirm your required tooth count and fitment details before ordering.
Sprocket Type Guide (JT Codes)
- Standard: JT’s standard sprocket design (best value everyday replacement)
- RB: Rubber damped sprocket for reduced noise and vibration
- SC: Self-cleaning design to help shed mud and debris (ideal for off-road use)
- ZBK: Black zinc finish for improved corrosion resistance and appearance
- Z: Zinc finish for corrosion resistance
JT sprockets are a popular choice for road, touring, and off-road riders thanks to their consistent fit and durability.
Before You Place Your Order...
- Note the image may not be exactly as item received and any slight difference will not be inferior or effect performance
- Check the fitment list to ensure this item will fit your vehicle
- When we refer to right or left, this is as you sit on your vehicle
- To find part by SKU, enter the number without "SKU" into the search box
- Products containing any fluid or hazardous materials, aerosols, batteries including large lithium jump starters cannot be shipped overseas due to courier restrictions although we can ship UK offshore and Scottish Highlands at higher shipping rates
- EU customers should check with your countries customs office to determine what additional costs such as tax or Import duties will be prior to purchasing. These charges are normally collected by the delivery company or when you pick the item up, they are not included in the item price or shipping charge on this website
All parts and accessories are brand new and include VAT where applicable.
Most parts are pattern or aftermarket although some will be genuine but are not always stated as being so.
The use of motorcycle manufacturers' names is for reference purposes only. We do not imply that the products we sell are made by or with the permission of the names listed.
Compatible Yamaha Motorcycles
- Yamaha TT600 RE 2003
- Yamaha TT600 RE 2004
- Yamaha XT600 2KF 1987
- Yamaha XT600 2KF 1988
- Yamaha XT600 2KF 1989
- Yamaha XT600 43F 1985
- Yamaha XT600 43F 1986
- Yamaha XT600 E 1990
- Yamaha XT600 E 1991
- Yamaha XT600 E 1992
- Yamaha XT600 E 1993
- Yamaha XT600 E 1994
- Yamaha XT600 E 1995
- Yamaha XT600 E 1996
- Yamaha XT600 E 1997
- Yamaha XT600 E 1998
- Yamaha XT600 E 1999
- Yamaha XT600 E 2000
- Yamaha XT600 E 2001
- Yamaha XT600 E 2002
- Yamaha XT600 E 2003
- Yamaha XT600 Z Tenere (55W/34L) 1985
- Yamaha XT600 ZE Tenere (1VJ) 1986
- Yamaha XT600 ZE Tenere (1VJ) 1987
- Yamaha XT600 ZE Tenere (3AJ) 1988
- Yamaha XT600 ZE Tenere (3AJ) 1989
- Yamaha XT600 ZE Tenere (3AJ) 1990
- Yamaha XTZ660 Tenere 1991
- Yamaha XTZ660 Tenere 1992
- Yamaha XTZ660 Tenere 1993
- Yamaha XTZ660 Tenere 1994
- Yamaha XTZ660 Tenere 1995
- Yamaha XTZ660 Tenere 1996
- Yamaha XTZ660 Tenere 1997
- Yamaha XTZ660 Tenere 1998
- Yamaha XV125 Virago 1997
- Yamaha XV125 Virago 1998
- Yamaha XV125 Virago 1999
- Yamaha XV125 Virago 2000
- Yamaha XV125 Virago 2001
- Yamaha XV250 S Virago 1995
- Yamaha XV250 S Virago 1996
- Yamaha XV250 S Virago 1997
- Yamaha XV250 S Virago 1998
- Yamaha XV250 S Virago 1999
- Yamaha XV250 S Virago 2000
- Yamaha XV250 V-Star 2008
- Yamaha XV250 V-Star 2009
- Yamaha XV250 V-Star 2010
- Yamaha XV250 V-Star 2011
- Yamaha XV250 V-Star 2012
- Yamaha XV250 V-Star 2013
- Yamaha XV250 V-Star 2014
- Yamaha XV250 Virago 1989
- Yamaha XV250 Virago 1990
- Yamaha XV250 Virago 1991
- Yamaha XV250 Virago 1992
- Yamaha XV250 Virago 1993
- Yamaha XV250 Virago 1994
- Yamaha YFM350 FW Big Bear 1987
- Yamaha YFM350 FW Big Bear 1988
- Yamaha YFM350 U Big Bear 1996
- Yamaha YFM350 U Big Bear 1997
- Yamaha YFM350 U Big Bear 1998
- Yamaha YFZ350 Banshee 1987
- Yamaha YFZ350 Banshee 1988
Standard
- Yamaha XT550 Trail 1982 (Standard)
- Yamaha XT550 Trail 1983 (Standard)
- Yamaha XT600 1983 (Standard)
- Yamaha XT600 43F 1984 (Standard)
- Yamaha XT600 Z Tenere (55W/34L) 1983 (Standard)
- Yamaha XT600 Z Tenere (55W/34L) 1984 (Standard)
