Description

When cylinders show light wear but remain within rebuildable limits, using oversized pistons can recover lost compression and extend service life. This Yamaha SX190 1800 HO +.25mm complete engine rebuild kit supplies the targeted components to make that correction.

Because all parts in this kit are selected to work with oversize pistons, you avoid mismatched components and reduce guesswork at assembly time. In addition, REV6 inspects each piece for fit and quality before shipment, so you install parts you can trust.

Instead of replacing individual parts at different times, this full kit renews key rotating, timing, and sealing systems all at once. That approach helps restore power, improve throttle response, and deliver reliable performance on the water.

THIS KIT INCLUDES

• Crankshaft – 6S5-11411-01-00
• Cam chain – 94591-66152-00
• Cam chain damper guide – 6BH-12251-00-00
• Cam chain tension guide – 6BH-12252-00-00
• Cam chain upper guide – 6BH-12241-00-00
• Complete gasket kit – 6CR-W0001-01-00, 6CS-W0001-01-00, 6HM-W0001-00-00, 6HM-W0001-01-00
• Oversize +.25mm piston kits – 6BH-11631-00-B0
• Connecting rods – 6BH-11650-10-00
• Connecting rod bearings (black) – 6S5-11656-50-00
• Crankshaft bearings (green) – 6S5-11416-40-00
• Intake camshaft – 6BH-12171-10-00
• Exhaust camshaft – 6BH-12181-10-00
• Camshaft gears – 6D3-12176-10-00, 90105-07004-00

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Yamaha SX190 1800 HO Engine Rebuild Kit +.25mm

WHY THIS KIT MATTERS

Light bore wear can let ring seal slip and sap compression. When this happens, oversized pistons restore clearance and improve engine sealing. Because this kit includes all the major wear parts that go with an oversize rebuild, your engine is renewed as a coordinated system rather than patched in pieces.

Also, renewing timing and sealing systems at the same time helps minimize future failures and improves reliability out on the water.

SUPPORT & RESOURCES

Before ordering, review our warranty policy to understand coverage. Next, explore rebuild insight on the REV6 blog or check answers in our FAQ center. If you need help confirming fitment or sizing, contact our team for guidance.

FITMENT

Yamaha SX190 1800 HO
2013–2015 Models

TAKE ACTION
If your SX190 engine shows signs of light cylinder wear, this +.25mm rebuild kit gives you the correct foundation to restore compression and performance. Nationwide shipping available—add it to your cart and rebuild with confidence.

We proudly support veteran and active service member discounts at REV6.