Description

When cylinder wear pushes past factory limits, a standard rebuild no longer cuts it. This Yamaha SX240 1800 HO master engine rebuild kit is built for +.50mm overbore applications where material loss demands a stronger reset.

Because every major internal system is addressed together, the engine regains proper compression, stable oil control, and reliable valve timing. As a result, the rebuild delivers long-term durability instead of short-term fixes.

All parts are selected to work together and are backed by a 1-year REV6 parts warranty, giving you confidence from teardown through final assembly.

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 +.50mm 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 valves – 6S5-12111-00-00
• Exhaust valves – 6S5-12121-00-00
• Intake camshaft – 6BH-12171-10-00
• Exhaust camshaft – 6BH-12181-10-00
• Camshaft gears – 6D3-12176-10-00, 90105-07004-00

LEARN MORE & GET SUPPORT

Review coverage details in our REV6 warranty information, dig deeper through the technical rebuild guides on our blog, find answers in the frequently asked questions, or reach out to our support team for build guidance.

FITMENT

Yamaha SX240 1800 HO Jet Boat
2013–2015

TAKE ACTION

If your SX240 engine requires a +.50mm overbore, this master rebuild kit delivers the correct solution in one package. Add it to your cart today and take advantage of nationwide shipping from REV6.

We proudly support our veterans with dedicated discounts as a small thank-you for your service.