Description
JT rear sprocket steel 40t-520 yam. Manufacturer part number JTR1857.40.
WPS part number 55-185740.
Performance Tool 25 Pk Shop Towels — W1476
$21.95
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JT Rear Sprocket Steel 40T-520 Yam — JTR1857.40
$27.95
JT rear sprocket steel 40t-520 yam.
In stock
Vehicle fitment
WPS lists this part for the following vehicles. Match your exact model and year.
Follow the position, mounting and installation notes in the product description. Modified vehicles may require different parts.
| Years | Make | Model |
|---|---|---|
| 1990–1995 | Yamaha | XT600 |
| 2008–2012 | Yamaha | YFM250R Raptor |
| 2008 | Yamaha | YFM250RSE Raptor SE |
| 2008 | Yamaha | YFM250RSE2 Raptor SE Custom |
| 2004–2012 | Yamaha | YFM350R Raptor |
| 1987–1988 | Yamaha | YFM350X Warrior |
| 2006–2015 | Yamaha | YFM700R Raptor |
| 2007–2015 | Yamaha | YFM700RSE Raptor SE |
| 2007 | Yamaha | YFM700RY Raptor GYTR Edition |
| 1987–1988 | Yamaha | YFZ350 Banshee |
| 2004–2009 | Yamaha | YFZ450 |
| 2006–2007 | Yamaha | YFZ450 Bill Balance Edition |
| 2007–2008 | Yamaha | YFZ450 SE |
| 2009–2015 | Yamaha | YFZ450R |
| 2009–2015 | Yamaha | YFZ450R SE |
| 2010–2011 | Yamaha | YFZ450X |
| 2010 | Yamaha | YFZ450X Bill Ballance |
| 2011 | Yamaha | YFZ450X SE |
Source: WPS vehicle-fitment data · WPS part 55-185740 · Checked November 11, 2026.
Additional information
| Weight | 1.37 lbs |
|---|---|
| Dimensions | 8.9 × 9.15 × 0.75 in |
Complete the job
Useful tools and supplies to go with this purchase. Check what you already have and what is included.
- Chain care →Choose cleaner and lubricant suitable for your chain construction.
- Chain installation tools →Match tool capacity, chain pitch and connecting-link type.
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