Engine Rotating Assemblies & Rebuild Kits

Rebuild Kit, Complete Bottom End, Kawasaki, KX125, Kit

Part Number: HRI-CBK0091

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Rebuild Kit, Complete Bottom End, Yamaha, Kit

Part Number: HRI-CBK0223

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, Suzuki, Kit

Part Number: HRI-CBK0225

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Estimated Ship Date: Mar 31, 2026 if ordered today

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BOTTOM END KIT Polaris

Part Number: HRI-HR00109

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Pro LS 4340 Piston and Rod Kit, 365 Cid., 4.005 bore, 3.622 stroke, 6.098 rod, 12cc dish, 9.6:1 @ 65cc, 9.2:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR3600512

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Estimated Ship Date: Today

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Rebuild Kit, Complete Bottom End, Kawasaki, Kit

Part Number: HRI-CBK0028

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Estimated Ship Date: Mar 30, 2026 if ordered today

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COMPLETE BOTTOM END KIT

Part Number: HRI-CBK0145

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Estimated Ship Date: Mar 31, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, Suzuki, LT-R450 QuadRacer, Kit

Part Number: HRI-CBK0112

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Estimated Ship Date: Mar 30, 2026 if ordered today

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BOTTOM END KIT Polaris

Part Number: HRI-HR00106

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Estimated Ship Date: Mar 30, 2026 if ordered today

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BOTTOM END KIT Polaris

Part Number: HRI-HR00118

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Estimated Ship Date: Mar 31, 2026 if ordered today

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BOTTOM END KIT Honda

Part Number: HRI-CBK0023

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Estimated Ship Date: Mar 31, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, for use on Honda®, CR85R, CR85RB Expert, Kit

Part Number: HRI-CBK0104

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, Yamaha, YFM66F, YXR66F, Kit

Part Number: HRI-CBK0116

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, Arctic Cat, Kawasaki, Suzuki, Kit

Part Number: HRI-CBK0096

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, for use on Honda®, Kit

Part Number: HRI-CBK0131

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, KTM, 144 SX, 150 SX, 150 XC, Kit

Part Number: HRI-CBK0063

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Estimated Ship Date: Mar 31, 2026 if ordered today

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Gasket Kit BOTTOM END KIT BOTTOM END KIT

Part Number: HRI-CBK0074

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Estimated Ship Date: Mar 30, 2026 if ordered today

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BOTTOM END KIT Polaris

Part Number: HRI-HR00122

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, Yamaha, YFZ450, Kit

Part Number: HRI-CBK0098

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, Yamaha, YZ125, Kit

Part Number: HRI-CBK0090

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, Kawasaki, Kit

Part Number: HRI-CBK0118

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Estimated Ship Date: Mar 31, 2026 if ordered today

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COMPLETE BOTTOM END KIT

Part Number: HRI-CBK0187

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Estimated Ship Date: Mar 31, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, Yamaha, YFZ450, Kit

Part Number: HRI-CBK0146

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Estimated Ship Date: Mar 31, 2026 if ordered today

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Rebuild Kit, Complete Bottom End, Suzuki, LT250R Quadracer, Kit

Part Number: HRI-CBK0065

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Pro LS 4340 Piston and Rod Kit, 378 Cid., 4.075 bore, 3.622 stroke, 6.125 rod, 12cc dish, 9.9:1 @ 65cc, 9.4:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR36L08012

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Estimated Ship Date: Today

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