Description

If you’re rebuilding a Yamaha AR240 HO 1800 engine, this master rebuild kit gives you the critical components needed to do the job right. Designed for 2013–2015 models, this +.50mm kit is ideal when cylinder wear requires oversize pistons while maintaining proper clearances.

Because accuracy matters, each component is selected to support proper fit and reliable assembly. In addition, REV6 technicians apply decades of hands-on experience to help builders avoid common rebuild mistakes.

If this is your first rebuild or you want a quick refresher, our Help Center explains shipping steps, core details, and what to expect after ordering.

This Master Engine Rebuild 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

Every REV6 rebuild kit is backed by a 1-year parts warranty. You can review full coverage details in our warranty policy.

Still have questions? Our FAQ page covers fitment, sizing, and ordering details, or you can contact our team directly for one-on-one support.

If you’re comparing rebuild options, our engine rebuild kit guide can help confirm that this master kit is the right choice.

Order today and rebuild your Yamaha AR240 HO engine with confidence. Nationwide shipping available.