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.
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PISTON YAMAHA DT 125 (DT125) R/RE/X '88-'06 (57.25MM=+1.25MM) (OEM:3MB-11631-00) - REPLACES 01.2246.125, ProX
Regular price $110.51 USDRegular priceUnit price / perSale price $110.51 USD -
PISTON YAMAHA DT 125 (DT125) R/RE/X '88-'06 (57.50MM=+1.50MM) (OEM:3MB-11631-00) - REPLACES 01.2246.150, ProX
Regular price $110.51 USDRegular priceUnit price / perSale price $110.51 USD -
PISTON YAMAHA DT 125 (DT125) R/RE/X '88-'06 (57.75MM=+1.75MM) (OEM:3MB-11631-00) - REPLACES 01.2246.175, ProX
Regular price $110.51 USDRegular priceUnit price / perSale price $110.51 USD -
PISTON YAMAHA DT 125 (DT125) R/RE/X '88-'06 (58.00MM=+2.00MM) (OEM:3MB-11631-00) - REPLACES 01.2246.200, ProX
Regular price $110.51 USDRegular priceUnit price / perSale price $110.51 USD -
PISTON YAMAHA GP 1300R '03-'08 (83.90MM)(WATER SCOOTER), ProX
Regular price $221.32 USDRegular priceUnit price / perSale price $221.32 USD -
PISTON YAMAHA GP 1300R '03-'08 (83.91MM)(WATER SCOOTER), ProX
Regular price $221.21 USDRegular priceUnit price / perSale price $221.21 USD -
PISTON YAMAHA GP 1300R '03-'08 (83.92MM)(WATER SCOOTER), ProX
Regular price $221.21 USDRegular priceUnit price / perSale price $221.21 USD -
PISTON YAMAHA GP 800R ,XL/XLT 800 '98-'05 ,GP 1200R XL1200 LTD, XLT 1200 '98-'05 ,(79.91MM)(WATER SCOOTER) (OEM:66E-11631-00), ProX
Regular price $135.79 USDRegular priceUnit price / perSale price $135.79 USD -
PISTON YAMAHA GP 800R ,XL/XLT 800 '98-'05 ,GP 1200R XL1200 LTD, XLT 1200 '98-'05 ,(79.92MM)(WATER SCOOTER) (OEM:66E-11631-00), ProX
Regular price $135.79 USDRegular priceUnit price / perSale price $135.79 USD -
PISTON YAMAHA GP 800R ,XL/XLT 800 '98-'05 ,GP 1200R XL1200 LTD, XLT 1200 '98-'05 ,(79.93MM)(WATER SCOOTER) (OEM:66E-11631-00), ProX
Regular price $137.21 USDRegular priceUnit price / perSale price $137.21 USD -
PISTON YAMAHA GP 800R ,XL/XLT 800 '98-'05 ,GP 1200R XL1200 LTD, XLT 1200 '98-'05 ,(80.50MM)(WATER SCOOTER) (OEM:66E-11631-00), ProX
Regular price $137.21 USDRegular priceUnit price / perSale price $137.21 USD -
PISTON YAMAHA PW 50 (PW50) 81-22 (40.00MM=STANDARD), ProX
Regular price $43.87 USDRegular priceUnit price / perSale price $43.87 USD -
PISTON YAMAHA PW 50 (PW50) 81-22 (40.50MM=+0.50MM), ProX
Regular price $43.53 USDRegular priceUnit price / perSale price $43.53 USD -
PISTON YAMAHA PW 50 (PW50) 81-22 (41.00MM=+1.00MM), ProX
Regular price $43.53 USDRegular priceUnit price / perSale price $43.53 USD -
PISTON YAMAHA PW 80 (PW80) (47.00MM=STANDARD), ProX
Regular price $76.56 USDRegular priceUnit price / perSale price $76.56 USD -
PISTON YAMAHA PW 80 (PW80) (47.50MM=+0.50MM), ProX
Regular price $75.91 USDRegular priceUnit price / perSale price $75.91 USD