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Sprocket JT. Aluminium Ultra-Light 251 - 520

JT. Aluminium Ultra-Light 251 - 520 Sprocket Ref : JTC00514A / 1096568004

JT. Aluminium Ultra-Light 251 - 520 Sprocket

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JT. Aluminium Ultra-Light 251 - 520 SprocketRef : JTC00514A / 1096568004

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Description
Compatible motorbikes
Questions and answers

DescriptionJT. Aluminium Ultra-Light 251 - 520 Sprocket

Product details :

Features

JT Sprockets Ultra-Light Sprocket 251 - 520 (Manufacturer part number: JTA251.51BLK)

Designed for demanding motocross riders and roadsters, this JT Sprockets sprocket combines lightness and strength thanks to aerospace-grade 7075-T6 aluminum (Ergal). Ideal for part replacement or to modify the gearing ratio, it fits on 520 pitch chains and maintains a standard profile suitable for most setups.

Material: 7075-T6 Aluminum (Ergal) — high strength, black finish.
Number of teeth: 51 teeth (sprocket 51).
Chain pitch: 520.
Type: Standard, ultra-light to reduce unsprung mass.
Finish: "Anti-mud" treatment promoting particle ejection and limiting buildup on the teeth.

Chain, sprocket, and crown form the basis of a healthy transmission: this JT sprocket allows you to regain predictable chain behavior and fine-tune your final ratio according to your use (track, trail, or road). Common compatibility examples: YAMAHA YZ 450 F (2026), FANTIC XX 125 (2022), GAS GAS EC 300 F (2015).

Technical information :

Reference

JTC00514A / 1096568004

Rear sprocket type

251

No transmission chain

520

Number of teeth (crown)

Type of crown

Ultra-light

Number of teeth

51 teeth

Material

Aluminum

Color

Black

Compatible motorbikes

YAMAHA69 compatible models

YZ 125 - 2024/2026TT-R 125 LW BIG WHEELS E (CE21) - 2021/2021WR 125 Z - 1999/2003YZ 125 (CE16) - 2006/2023YZ 125 (CE15) - 2005/2005YZ 125 (CE03) - 1999/1999YZ 125 (CE08) - 2001/2001YZ 125 (CE10) - 2003/2003YZ 125 (CE05) - 2000/2000YZ 125 (CE13) - 2004/2004YZ 125 (CE09) - 2002/2002TT-R 230 - 2005/2006WR 250 F - 2020/2022YZ 250 F (CG39) - 2017/2018YZ 250 F - 2022/2026WR 250 R (DG20) - 2008/2016YZ 250 F (CG34) - 2014/2016YZ 250 - 2024/2026YZ 250 (CG23) - 2006/2023YZ 250 X - 2016/2020WR 250 F (RE25) - 2016/2019WR 250 F ENDURO GP (RE25) - 2018/2018YZ 250 (CG08) - 2000/2001YZ 250 (CG05) - 1999/1999YZ 250 (CG13) - 2003/2003YZ 250 (CG12) - 2002/2002YZ 250 (CG20) - 2005/2005WR 250 X (DG20) - 2008/2014YZ 250 (CG17) - 2004/2004YZ 250 F (CG18) - 2004/2004WR 250 F (CG24) - 2006/2006WR 250 F (CG16) - 2003/2004WR 250 F (CG11) - 2001/2002WR 250 F (CG26) - 2007/2007WR 250 F (CG36) - 2015/2015YZ 250 F (CG10) - 2001/2002YZ 250 F (CG14) - 2003/2003YZ 250 F (CG33) - 2010/2013WR 250 F (CG30) - 2008/2014YZ 250 F (CG40) - 2019/2021YZ 250 FX - 2015/2024YZ 250 F (CG25) - 2006/2006YZ 250 F (CG27) - 2007/2009YZ 250 F (CG21) - 2005/2005WR 250 F (CG22) - 2005/2005WR 400 F (CH04) - 1999/2000YZ 400 F (CH03) - 1999/1999WR 426 F (CJ02) - 2001/2002YZ 426 F (CJ01) - 2000/2002YZ 450 F (CJ18) - 2014/2015YZ 450 FX - 2016/2024YZ 450 F (CJ06) - 2005/2005WR 450 F ENDURO GP (RE45) - 2018/2018YZ 450 F (CJ10) - 2006/2009YZ 450 F (CJ15) - 2010/2013YZ 450 F (CJ21) - 2016/2017YZ 450 F (CJ22) - 2018/2018YZ 450 F (CJ23) - 2019/2021WR 450 F (CJ13) - 2008/2011WR 450 F (CJ04) - 2003/2004WR 450 F (RE45) - 2018/2020WR 450 F (CJ09) - 2006/2006YZ 450 F (CJ05) - 2004/2004YZ 450 F (CJ03) - 2003/2003WR 450 F (DJ03) - 2012/2015WR 450 F (CJ12) - 2007/2007YZ 450 F - 2022/2026WR 450 F - 2016/2017 - 2021/2023WR 450 F (CJ07) - 2005/2005

GAS-GAS4 compatible models

EC 250 F SIX DAYS - 2012/2012EC 250 F - 2010/2015EC 250 F REPLICA CAMI - 2014/2014EC 300 F - 2013/2015

HONDA3 compatible models

FX 650 VIGOR (RD09) - 2000/2000SLR 650 (RD09) - 1997/1998NX 650 DOMINATOR (RD02) - 1988/1990

FANTIC2 compatible models

XE 125 - 2021/2022XX 125 - 2021/2022

RIEJU1 compatible model

MARATHON 250 - 2010/2012