Description

The Yamaha AR240 HO 1800 Jet Boat +0.25mm Master Engine Rebuild Kit is built for 2013–2015 models that require a light oversize piston setup. This kit is commonly used when cylinder wear exceeds standard limits but does not require heavy machining.

Because all components are matched for +0.25mm bore sizing, this master kit supports a complete internal rebuild while maintaining proper clearances and fitment.

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 +0.25mm 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

IMPORTANT NOTES

This +0.25mm kit requires cylinder measurement and proper machining before installation. If you are unsure whether +0.25mm is the correct size, review our engine rebuild kit guide or reach out for confirmation.

SUPPORT & WARRANTY

All REV6 rebuild kits include a 1-year parts warranty. For full coverage details, visit our warranty policy. Additional fitment help is available through the FAQ page or by contacting our team.

FITMENT

Yamaha AR240 HO 1800
2013–2015

TAKE ACTION
If your AR240 HO 1800 requires a +0.25mm rebuild, this master kit keeps everything matched and ready for assembly. Nationwide shipping is available—order today and keep your project moving.

Veterans and active-duty service members qualify for exclusive REV6 discounts as our way of saying thank you.