Engine Rotating Assemblies & Rebuild Kits

Pro LS 4340 Piston and Rod Kit, 408 Cid., 4.030 bore, 4.000 stroke, 6.125 rod, 8cc dish, 11.1:1 @ 65cc, 10.6:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR400308

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Pro LS 4340 Piston and Rod Kit, 415 Cid., 4.065 bore, 4.000 stroke, 6.125 rod, 21cc dish, 9.9:1 @ 65cc, 9.5:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR4006521

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Pro LS 4340 Piston and Rod Kit, 416 Cid., 4.070 bore, 4.000 stroke, 6.125 rod, 21cc dish, 9.9:1 @ 65cc, 9.5:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR4007021

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Pro LS 4340 Piston and Rod Kit, 417 Cid., 4.075 bore, 4.000 stroke, 6.125 rod, 6cc dish, 11.5:1 @ 65cc, 11:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR400756

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Pro LS Piston and Rod Kit, 326 Cid., 3.785 bore, Standard 3.622 stroke, 6.098 rod, 7cc dish, 9.7:1 @ 61cc, 9.3:1 @ 65cc, File-Fit Rings

Part Number: SUM-PR367857

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Pro LS Piston and Rod Kit, 371 Cid., 4.040 bore, 3.622 stroke, 6.125 rod, 2cc Flat Top, 10.9:1 @ 65cc, 10.3:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR36L0402

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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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Pro LS 4340 Piston and Rod Kit, 378 Cid., 4.080 bore, 3.622 stroke, 6.125 rod, 2cc dome, 11.6:1 @ 65cc, 10.9:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR36L0802

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STD BORE KIT

Part Number: CLW-10006-K02

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Estimated Ship Date: Nov 3, 2025 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: Oct 27, 2025 if ordered today

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Rebuild Kit, Complete Bottom End, for use on Honda®, CRF450X, Kit

Part Number: HRI-CBK0105

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Estimated Ship Date: Oct 27, 2025 if ordered today

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COMPLETE BOTTOM END KIT

Part Number: HRI-CBK0140

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Estimated Ship Date: Oct 27, 2025 if ordered today

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COMPLETE BOTTOM END KIT

Part Number: HRI-CBK0145

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Estimated Ship Date: Oct 27, 2025 if ordered today

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HD IN-FRAME KIT

Part Number: CLE-4595521STD

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Estimated Ship Date: Nov 17, 2025 if ordered today

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VERTEX COMPLETE ENGINE REBUILD KIT

Part Number: VPX-WR101-076

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Estimated Ship Date: Nov 4, 2025 if ordered today

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Complete Engine Rebuild Kit, Stock Bore, Stock Stroke, 12.00 to 1 Compression, Yamaha, Kit

Part Number: VPX-WR101-079

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Estimated Ship Date: Nov 4, 2025 if ordered today

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VERTEX COMPLETE ENGINE REBUILD KIT

Part Number: VPX-WR101-013

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Estimated Ship Date: Nov 4, 2025 if ordered today

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Rebuild Kit, Complete Bottom End, Yamaha, YZ250F, Kit

Part Number: HRI-CBK0087

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Estimated Ship Date: Oct 27, 2025 if ordered today

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QB FULL TOP END SET

Part Number: QDB-56-3907

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Estimated Ship Date: Oct 30, 2025 if ordered today

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QB FULL TOP END SET

Part Number: QDB-56-3912

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Estimated Ship Date: Oct 30, 2025 if ordered today

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QB FULL TOP END SET

Part Number: QDB-56-3914

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Estimated Ship Date: Oct 30, 2025 if ordered today

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QB FULL TOP END SET

Part Number: QDB-56-3924

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Estimated Ship Date: Oct 30, 2025 if ordered today

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QB FULL TOP END SET

Part Number: QDB-56-3938

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Estimated Ship Date: Oct 30, 2025 if ordered today

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QB FULL TOP END SET

Part Number: QDB-56-3949

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Estimated Ship Date: Oct 30, 2025 if ordered today

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QB FULL TOP END SET

Part Number: QDB-56-3956

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Estimated Ship Date: Oct 30, 2025 if ordered today

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