Availability
Powersports Piston and Ring Kits
Repair Kit, Top End, 84.97mm Bore, for use on Honda®, Kit
Part Number: NTI-NA-10040K
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Piston and Ring Kit, Forged Aluminum, 52.000mm Bore, Polaris, Kit
Part Number: WIS-839M05200
Not Yet Reviewed
Estimated Ship Date: Mar 25, 2026 if ordered today
Estimated Ship Date: Mar 25, 2026 if ordered today
Repair Kit, Top End, 71.96mm Bore, 6.00 to 1 Compression Ratio, Polaris, Kit
Part Number: NTI-NA-50000K
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Repair Kit, Top End, 72.46mm Bore, 6.00 to 1 Compression Ratio, Polaris, Kit
Part Number: NTI-NA-50000-2K
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Piston and Ring Kit, Forged Aluminum, 47.500mm Bore, Yamaha, Kit
Part Number: WIS-805M04750
Not Yet Reviewed
Estimated Ship Date: Mar 26, 2026 if ordered today
Estimated Ship Date: Mar 26, 2026 if ordered today
Repair Kit, Top End, 54.000mm Bore, 8.20 to 1 Compression Ratio, Kawasaki, Kit
Part Number: NTI-NX-20000K
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Piston, TOP END REPAIR KIT
Part Number: NTI-NX-20000-BK
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Cylinder Head NAMURA TOP END REPAIR KIT NAMURA TOP END REPAIR KIT
Part Number: NTI-NA-20005-2K
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
ProX Piston Kit CR125 '88-91 (53.93mm)
Part Number: PXR-01-1208-A
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Piston and Ring Kit, Forged Aluminum, 39.500mm Bore, KTM, Kit
Part Number: WIS-803M03950
Not Yet Reviewed
Estimated Ship Date: Mar 25, 2026 if ordered today
Estimated Ship Date: Mar 25, 2026 if ordered today
Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT
Part Number: NTI-NX-30004-CK
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
ProX Piston Kit KX100 '95-13 (52.45mm)
Part Number: PXR-01-4195-A
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Repair Kit, Top End, 53.940mm Bore, 8.80 to 1 Compression Ratio, for use on Honda®, Kit
Part Number: NTI-NX-10000K
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Piston and Ring Kit, Forged Aluminum, 47.500mm Bore, Honda®, Kit
Part Number: WIS-833M04750
Not Yet Reviewed
Estimated Ship Date: Mar 25, 2026 if ordered today
Estimated Ship Date: Mar 25, 2026 if ordered today
TOP END REPAIR KIT
Part Number: NTI-NA-40019-2K
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Repair Kit, Top End, 65.97mm Bore, 9.20 to 1 Compression Ratio, Suzuki, Kit
Part Number: NTI-NA-30000K
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Repair Kit, Top End, 53.960mm Bore, 8.90 to 1 Compression Ratio, Yamaha, Kit
Part Number: NTI-NX-40000-CK
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Repair Kit, Top End, 5.-950mm Bore, 8.90 to 1 Compression Ratio, Yamaha, Kit
Part Number: NTI-NX-40000-BK1
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Repair Kit, Top End, 48.450mm Bore, 9.20 to 1 Compression Ratio, Kawasaki, Kit
Part Number: NTI-NX-20085K
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Repair Kit, Top End, 47.44mm Bore, 8.40 to 1 Compression Ratio, for use on Honda®, Kit
Part Number: NTI-NX-10081K
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Repair Kit, Top End, 46.960mm Bore, 8.40 to 1 Compression Ratio, for use on Honda®, Kit
Part Number: NTI-NX-10080-CK1
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
ProX Piston Kit KX80 '90-00 (82cc) (47.97mm)
Part Number: PXR-01-4108-D
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Repair Kit, Top End, 81.96mm Bore, 9.00 to 1 Compression Ratio, Arctic Cat, Suzuki, Kit
Part Number: NTI-NA-30010K
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
TOP END REPAIR KIT
Part Number: NTI-NX-20060-BK
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
ProX Piston Kit KTM65SX '09-22 + TC65 '17-22 (44.99mm)
Part Number: PXR-01-6029-D
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster