Engine Rotating Assemblies & Rebuild Kits

Pro LS 4340 Rotating Assembly, 370 Cid., 4.030 bore, 3.622 stroke, 58x, 6.098 rod, 12cc dish, 9.7:1 @ 65cc, 9.3:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R583603012

Not Yet Reviewed

Estimated Ship Date: Tomorrow

Pro LS Rotating Assembly, 370 Cid., 4.030 bore, 3.622 stroke, 58x, 6.098 rod, 2cc Flat Top, 10.9:1 @ 65cc, 10.3:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R58360302

Not Yet Reviewed

Estimated Ship Date: Tomorrow

Pro LS Rotating Assembly, 371 Cid., 4.040 bore, 3.622 stroke, 58x, 6.098 rod, 2cc Flat Top, 10.9:1 @ 65cc, 10.3:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R58360402

Not Yet Reviewed

Estimated Ship Date: Tomorrow

Pro LS Rotating Assembly, 325 Cid, 3.780 bore, Standard 3.622 stroke, 58x, 6.098 rod, 2cc dome, 10.9:1 @ 61cc, 10.3:1 @ 65cc, File-Fit Ring, H Bearing

Part Number: SUM-R58367802

Not Yet Reviewed

Estimated Ship Date: Tomorrow

Pro LS Rotating Assembly, 326 Cid., 3.785 bore, Standard 3.622 stroke, 58x, 6.098 rod, 7cc dish, 9.7:1 @ 61cc, 9.3:1 @ 65cc, File-Fit Rings, H Bearing

Part Number: SUM-R58367857

Not Yet Reviewed

Estimated Ship Date: Tomorrow

Pro LS Rotating Assembly, 330 Cid., 3.810 bore, Standard 3.622 stroke, 58x, 6.098 rod, 2cc dome, 11:1 @ 61cc, 10.4:1 @ 65cc, File-Fit Rings, H Bearing

Part Number: SUM-R58368102

Not Yet Reviewed

Estimated Ship Date: Tomorrow

Repair Kit, Top End, 76.950mm Bore, 13.50 to 1 Compression Ratio, Kawasaki, Kit

Part Number: NTI-NX-20031K

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Repair Kit, Top End, 42.950mm Bore, 8.40 to 1 Compression Ratio, Kawasaki, Kit

Part Number: NTI-NX-20060K

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NX-20080K2

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NX-20085-CK

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NX-30000-4K

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

Repair Kit, Top End, 53.96mm Bore, 8.30 to 1 Compression Ratio, Suzuki, Kit

Part Number: NTI-NX-30000-CK

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NX-30004K

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NX-30024-BK

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NX-30024-BK2

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

Repair Kit, Top End, 66.35mm Bore, 8.60 to 1 Compression Ratio, Suzuki, Kit

Part Number: NTI-NX-30024K1

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NX-30080-2K

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NX-30080-CK

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

Repair Kit, Top End, 47.950mm Bore, 9.50 to 1 Compression Ratio, Suzuki, Kit

Part Number: NTI-NX-30085-CK

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

Repair Kit, Top End, 53.950mm Bore, 8.90 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NX-40000-BK

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NX-40005-4K

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NX-40008-4K

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

Repair Kit, Top End, 85.970mm Bore, 11.00 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10003-4K

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order

Repair Kit, Top End, 84.970mm Bore, 11.00 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10003K

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Repair Kit, Top End, 78.96mm Bore, 8.80 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10007-2K

Not Yet Reviewed

Estimated Ship Date: Sep 30, 2025 if ordered today

• Drop Ship
• Special Order