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Collection: ProX Racing Parts

ProX Racing Parts — High-Performance Engine Components for Off-Road, ATV & Scooters

ProX Racing Parts is a globally recognized brand specializing in high-quality internal engine components for motorcycles, scooters, and ATVs. With manufacturing based mainly in Japan, ProX delivers precision-made pistons, connecting rods, crankshafts, valves, and other vital engine parts that meet or exceed OEM standards. Ideal for off-road, motocross, and racing applications, ProX parts combine durability, performance, and exact fitment. Explore our full range of ProX components and enjoy fast delivery and worldwide shipping.

REAR SPROCKET 820 50 / 702 50 ALUMINUM HUSQVARNA CR/WR/TE/TC '90-'13, BETA RR '05-'12 (82050,70250) (JTR822. 50) (CHAIN 520), ProX

REAR SPROCKET 820 50 / 702 50 ALUMINUM HUSQVARNA CR/WR/TE/TC '90-'13, BETA RR '05-'12 (82050,70250) (JTR822. 50) (CHAIN 520), ProX

Regular price $50.66 USD

Regular price Sale price $50.66 USD
Unit price per
REAR SPROCKET 820 50 STEEL ULTRALITE HUSQVARNA CR / WR / TE / TC '90-'13, BETA RR '05-'12, GAS GAS EC / MC / XC, SHERCO SE / SE-R (82050JT) (JTR822.50) BLACK COLOR - REPLACES 07.RS62097-50, ProX

REAR SPROCKET 820 50 STEEL ULTRALITE HUSQVARNA CR / WR / TE / TC '90-'13, BETA RR '05-'12, GAS GAS EC / MC / XC, SHERCO SE / SE-R (82050JT) (JTR822.50) BLACK COLOR - REPLACES 07.RS62097-50, ProX

Regular price $48.19 USD

Regular price Sale price $48.19 USD
Unit price per
REAR SPROCKET 820 51 / 702 51 ALUMINUM HUSQVARNA CR/WR/TE/TC '90-'13, BETA RR '05-'12 (82051,70251) (JTR822. 51) (CHAIN 520), ProX

REAR SPROCKET 820 51 / 702 51 ALUMINUM HUSQVARNA CR/WR/TE/TC '90-'13, BETA RR '05-'12 (82051,70251) (JTR822. 51) (CHAIN 520), ProX

Regular price $50.66 USD

Regular price Sale price $50.66 USD
Unit price per
REAR SPROCKET 820 51 STEEL ULTRALITE HUSQVARNA CR / WR / TE / TC '90-'13, BETA RR '05-'12, GAS GAS EC / MC / XC, SHERCO SE / SE-R (82051JT) (JTR822.51) BLACK COLOR, ProX

REAR SPROCKET 820 51 STEEL ULTRALITE HUSQVARNA CR / WR / TE / TC '90-'13, BETA RR '05-'12, GAS GAS EC / MC / XC, SHERCO SE / SE-R (82051JT) (JTR822.51) BLACK COLOR, ProX

Regular price $48.19 USD

Regular price Sale price $48.19 USD
Unit price per
REAR SPROCKET 820 52 / 702 52 ALUMINUM HUSQVARNA CR/WR/TE/TC '90-'13, BETA RR '05-'12 (82052,70252) (JTR822. 52) (CHAIN 520), ProX

REAR SPROCKET 820 52 / 702 52 ALUMINUM HUSQVARNA CR/WR/TE/TC '90-'13, BETA RR '05-'12 (82052,70252) (JTR822. 52) (CHAIN 520), ProX

Regular price $50.66 USD

Regular price Sale price $50.66 USD
Unit price per
REAR SPROCKET 820 52 STEEL ULTRALITE HUSQVARNA CR / WR / TE / TC '90-'13, BETA RR '05-'12, GAS GAS EC / MC / XC, SHERCO SE / SE-R (82052JT) (JTR822.52) BLACK COLOR - REPLACES 07.RS62097-52, ProX

REAR SPROCKET 820 52 STEEL ULTRALITE HUSQVARNA CR / WR / TE / TC '90-'13, BETA RR '05-'12, GAS GAS EC / MC / XC, SHERCO SE / SE-R (82052JT) (JTR822.52) BLACK COLOR - REPLACES 07.RS62097-52, ProX

Regular price $48.19 USD

Regular price Sale price $48.19 USD
Unit price per
REAR SPROCKET 856 48 ALUMINUM YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85648) (JTR853.48) (CHAIN 520), ProX

REAR SPROCKET 856 48 ALUMINUM YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85648) (JTR853.48) (CHAIN 520), ProX

Regular price $50.66 USD

Regular price Sale price $50.66 USD
Unit price per
REAR SPROCKET 856 48 STEEL ULTRALITE YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85648) (JTR853.48) (STD.48) (CHAIN 520), ProX

REAR SPROCKET 856 48 STEEL ULTRALITE YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85648) (JTR853.48) (STD.48) (CHAIN 520), ProX

Regular price $42.14 USD

Regular price Sale price $42.14 USD
Unit price per
REAR SPROCKET 856 49 ALUMINUM YAMAHA YZ 125 / 250 '80-'98, WR 250 '90-'98 (85649) (JTR853.49) (CHAIN 520), ProX

REAR SPROCKET 856 49 ALUMINUM YAMAHA YZ 125 / 250 '80-'98, WR 250 '90-'98 (85649) (JTR853.49) (CHAIN 520), ProX

Regular price $50.66 USD

Regular price Sale price $50.66 USD
Unit price per
REAR SPROCKET 856 49 STEEL ULTRALITE YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85649) (JTR853.49) (STD.+1) (CHAIN 520), ProX

REAR SPROCKET 856 49 STEEL ULTRALITE YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85649) (JTR853.49) (STD.+1) (CHAIN 520), ProX

Regular price $45.35 USD

Regular price Sale price $45.35 USD
Unit price per
REAR SPROCKET 856 50 ALUMINUM YAMAHA YZ 125 / 250 '80-'98, WR 250 '90-'98 (85650) (JTR853.50) (CHAIN 520), ProX

REAR SPROCKET 856 50 ALUMINUM YAMAHA YZ 125 / 250 '80-'98, WR 250 '90-'98 (85650) (JTR853.50) (CHAIN 520), ProX

Regular price $50.66 USD

Regular price Sale price $50.66 USD
Unit price per
REAR SPROCKET 856 50 STEEL ULTRALITE YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85650) (JTR853.50) (STD.+2) (CHAIN 520), ProX

REAR SPROCKET 856 50 STEEL ULTRALITE YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85650) (JTR853.50) (STD.+2) (CHAIN 520), ProX

Regular price $44.38 USD

Regular price Sale price $44.38 USD
Unit price per
REAR SPROCKET 856 51 ALUMINUM YAMAHA YZ 125 / 250 '80-'98, WR 250 '90-'98 (85651) (JTR853.51) (CHAIN 520), ProX

REAR SPROCKET 856 51 ALUMINUM YAMAHA YZ 125 / 250 '80-'98, WR 250 '90-'98 (85651) (JTR853.51) (CHAIN 520), ProX

Regular price $50.66 USD

Regular price Sale price $50.66 USD
Unit price per
REAR SPROCKET 856 51 STEEL ULTRALITE YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85651) (JTR853.51) (STD.+3) (CHAIN 520), ProX

REAR SPROCKET 856 51 STEEL ULTRALITE YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85651) (JTR853.51) (STD.+3) (CHAIN 520), ProX

Regular price $43.65 USD

Regular price Sale price $43.65 USD
Unit price per
REAR SPROCKET 856 52 STEEL ULTRALITE YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85652) (JTR853.52) (STD.+4) (CHAIN 520), ProX

REAR SPROCKET 856 52 STEEL ULTRALITE YAMAHA YZ 125/250 '80-98, WR 250 '90-98 (85652) (JTR853.52) (STD.+4) (CHAIN 520), ProX

Regular price $43.65 USD

Regular price Sale price $43.65 USD
Unit price per
REAR SPROCKET 899 47 ALUMINUM KTM SX / EXC / XC-W 125 / 150 / 200 / 250 / 300 / 350 / 360 / 380 / 400 / 450 / 500, HUSQVARNA, HUSABERG, GAS GAS (89947) (JTR897.47), ProX

REAR SPROCKET 899 47 ALUMINUM KTM SX / EXC / XC-W 125 / 150 / 200 / 250 / 300 / 350 / 360 / 380 / 400 / 450 / 500, HUSQVARNA, HUSABERG, GAS GAS (89947) (JTR897.47), ProX

Regular price $50.66 USD

Regular price Sale price $50.66 USD
Unit price per