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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 289 49 ALUMINUM BETA RR 125 / 200 / '18-'25, RR 250 / 300 / 350 / 430 / 480 '13-'25, XTRAINER 300 '15-'25, RR 400 / 450 / 498 '13-'14 (28949) (JTR210.49), ProX

REAR SPROCKET 289 49 ALUMINUM BETA RR 125 / 200 / '18-'25, RR 250 / 300 / 350 / 430 / 480 '13-'25, XTRAINER 300 '15-'25, RR 400 / 450 / 498 '13-'14 (28949) (JTR210.49), ProX

Regular price $50.37 USD

Regular price Sale price $50.37 USD
Unit price per
REAR SPROCKET 289 49 STEEL ULTRALITE BETA RR 125-498 '13-22 (28949) (JTR210.49) (STD.49) (CHAIN.520), ProX

REAR SPROCKET 289 49 STEEL ULTRALITE BETA RR 125-498 '13-22 (28949) (JTR210.49) (STD.49) (CHAIN.520), ProX

Regular price $43.93 USD

Regular price Sale price $43.93 USD
Unit price per
REAR SPROCKET 289 49 STEEL ULTRALITE HONDA CR 125/250/F250R/F450R '87-'25 (28949) (JTR210.49) (STD.-2) (CHAIN.520) - REPLACES 07.RS12087-49, ProX

REAR SPROCKET 289 49 STEEL ULTRALITE HONDA CR 125/250/F250R/F450R '87-'25 (28949) (JTR210.49) (STD.-2) (CHAIN.520) - REPLACES 07.RS12087-49, ProX

Regular price $47.82 USD

Regular price Sale price $47.82 USD
Unit price per
REAR SPROCKET 289 50 ALUMINUM BETA RR 125 / 200 / '18-'25, RR 250 / 300 / 350 / 430 / 480 '13-'25, XTRAINER 300 '15-'25, RR 400 / 450 / 498 '13-'14 (28950) (JTR210.50), ProX

REAR SPROCKET 289 50 ALUMINUM BETA RR 125 / 200 / '18-'25, RR 250 / 300 / 350 / 430 / 480 '13-'25, XTRAINER 300 '15-'25, RR 400 / 450 / 498 '13-'14 (28950) (JTR210.50), ProX

Regular price $48.19 USD

Regular price Sale price $48.19 USD
Unit price per
REAR SPROCKET 289 50 ALUMINUM HONDA CR/CRF (28950) (JTR210.50), ProX

REAR SPROCKET 289 50 ALUMINUM HONDA CR/CRF (28950) (JTR210.50), ProX

Regular price $50.66 USD

Regular price Sale price $50.66 USD
Unit price per
REAR SPROCKET 289 50 STEEL ULTRALITE BETA RR 125-498 '13-'25(28950) (JTR210.50) (STD.+1) (CHAIN.520), ProX

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REAR SPROCKET 289 50 STEEL ULTRALITE BETA RR 125-498 '13-'25(28950) (JTR210.50) (STD.+1) (CHAIN.520), ProX

Regular price $47.79 USD

Regular price Sale price $47.79 USD
Unit price per

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REAR SPROCKET 289 50 STEEL ULTRALITE HONDA CR 125/250/F250R/F450R '87-'25 (28950) (JTR210.50) (STD.-1) (CHAIN.520) - REPLACES 07.RS12087-50, ProX

REAR SPROCKET 289 50 STEEL ULTRALITE HONDA CR 125/250/F250R/F450R '87-'25 (28950) (JTR210.50) (STD.-1) (CHAIN.520) - REPLACES 07.RS12087-50, ProX

Regular price $43.65 USD

Regular price Sale price $43.65 USD
Unit price per
REAR SPROCKET 289 51 ALUMINUM BETA RR 125 / 200 / '18-'25, RR 250 / 300 / 350 / 430 / 480 '13-'25, XTRAINER 300 '15-'25, RR 400 / 450 / 498 '13-'14 (28951) (JTR210.51) (CHAIN 520), ProX

REAR SPROCKET 289 51 ALUMINUM BETA RR 125 / 200 / '18-'25, RR 250 / 300 / 350 / 430 / 480 '13-'25, XTRAINER 300 '15-'25, RR 400 / 450 / 498 '13-'14 (28951) (JTR210.51) (CHAIN 520), ProX

Regular price $48.19 USD

Regular price Sale price $48.19 USD
Unit price per
REAR SPROCKET 289 51 ALUMINUM HONDA CR/CRF (28951) (JTR210.51), ProX

REAR SPROCKET 289 51 ALUMINUM HONDA CR/CRF (28951) (JTR210.51), ProX

Regular price $51.02 USD

Regular price Sale price $51.02 USD
Unit price per
REAR SPROCKET 289 51 STEEL ULTRALITE BETA RR 125-498 '13-22 (28951) (JTR210.51) (STD.+2) (CHAIN.520), ProX

REAR SPROCKET 289 51 STEEL ULTRALITE BETA RR 125-498 '13-22 (28951) (JTR210.51) (STD.+2) (CHAIN.520), ProX

Regular price $48.19 USD

Regular price Sale price $48.19 USD
Unit price per
REAR SPROCKET 289 51 STEEL ULTRALITE HONDA CR 125/250/F250R/F450R '87-'25 (28951) (JTR210.51) (STD.) (CHAIN.520) - REPLACES 07.RS12087-51, ProX

REAR SPROCKET 289 51 STEEL ULTRALITE HONDA CR 125/250/F250R/F450R '87-'25 (28951) (JTR210.51) (STD.) (CHAIN.520) - REPLACES 07.RS12087-51, ProX

Regular price $42.51 USD

Regular price Sale price $42.51 USD
Unit price per
REAR SPROCKET 289 52 ALUMINUM HONDA CR/CRF (28952) (JTR210.52), ProX

REAR SPROCKET 289 52 ALUMINUM HONDA CR/CRF (28952) (JTR210.52), ProX

Regular price $51.02 USD

Regular price Sale price $51.02 USD
Unit price per
REAR SPROCKET 289 52 STEEL ULTRALITE HONDA CR 125/250/F250R/F450R '87-'25 (28952) (JTR210.52) (STD.+1) (CHAIN.520) - REPLACES 07.RS12087-52, ProX

REAR SPROCKET 289 52 STEEL ULTRALITE HONDA CR 125/250/F250R/F450R '87-'25 (28952) (JTR210.52) (STD.+1) (CHAIN.520) - REPLACES 07.RS12087-52, ProX

Regular price $42.51 USD

Regular price Sale price $42.51 USD
Unit price per
REAR SPROCKET 3505 50 ALUMINUM TM MX / EN 125 / 250 '97-'25, EN 250 / 450 F / Fi '01-'25, EN / MX 530 '03-'18 (350550) (CHAIN 520), ProX

REAR SPROCKET 3505 50 ALUMINUM TM MX / EN 125 / 250 '97-'25, EN 250 / 450 F / Fi '01-'25, EN / MX 530 '03-'18 (350550) (CHAIN 520), ProX

Regular price $50.66 USD

Regular price Sale price $50.66 USD
Unit price per
REAR SPROCKET 3505 51 ALUMINUM TM MX / EN 125 / 250 '97-'25, EN 250 / 450 F / Fi '01-'25, EN / MX 530 '03-'18 (350551) (CHAIN 520), ProX

REAR SPROCKET 3505 51 ALUMINUM TM MX / EN 125 / 250 '97-'25, EN 250 / 450 F / Fi '01-'25, EN / MX 530 '03-'18 (350551) (CHAIN 520), ProX

Regular price $50.66 USD

Regular price Sale price $50.66 USD
Unit price per
REAR SPROCKET 4306 50 ALUMINUM HONDA CR 80/85 '86-07, CRF 150R '07-25 (430650) (JTR215.50) (STD.+1) (CHAIN.420), ProX

REAR SPROCKET 4306 50 ALUMINUM HONDA CR 80/85 '86-07, CRF 150R '07-25 (430650) (JTR215.50) (STD.+1) (CHAIN.420), ProX

Regular price $51.02 USD

Regular price Sale price $51.02 USD
Unit price per