Description

When light cylinder wear starts to affect compression, a standard rebuild may fall short. This Yamaha SX240 1800 HO master engine rebuild kit is designed for +.25mm overbore applications where a controlled material cleanup brings the engine back into spec.

Because every major internal system is refreshed together, the rebuild delivers consistent piston sealing, stable oil control, and accurate valve timing. As a result, performance returns without pushing the engine beyond necessary limits.

All components are selected to work as a matched set and are supported by a 1-year REV6 parts warranty for added peace of mind during 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 +.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 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

Before starting your build, review our REV6 warranty coverage, explore rebuild tips on the REV6 blog, check common questions in the support FAQ, or contact our team for guidance.

FITMENT

Yamaha SX240 1800 HO Jet Boat
2013–2015

TAKE ACTION

If your SX240 engine needs a controlled +.25mm overbore, this master rebuild kit delivers the right balance of correction and longevity. Add it to your cart today and take advantage of nationwide shipping from REV6.

Your service matters to us—veterans receive special pricing at REV6.