Upgrade the top end of your compatible Yamaha ATV or UTV with the NAMURA Hyperdryve piston kit, part number NA-40025-2. This performance-oriented replacement piston features a 103.47 mm bore size, a +0.50 mm oversize specification, and an 11:1 compression ratio. It is designed for selected Yamaha 700 models and provides a purpose-built replacement solution for engines requiring an oversize piston.
Fitment includes the 2016–2017 Yamaha YFM700K Kodiak IRS, 2016–2017 YFM700KP Kodiak EPS, 2016–2017 YFM700KPS Kodiak EPS SE, 2016 YXE700 Wolverine R-Spec, 2016 YXE700 Wolverine R-Spec EPS, and 2016–2017 YFM700G Grizzly Fi 4WD IRS. Always verify the exact model, year, engine specifications, and required bore size before installation.
This NAMURA piston kit is not compatible with OEM piston rings, and the included or specified rings will not work with an OEM piston. Proper machine work, piston-to-cylinder clearance, ring installation, and engine assembly procedures are required for reliable performance. Use the manufacturer’s service information and confirm all components are matched to the NA-40025-2 application.
Features:
- Brand: NAMURA
- Manufacturer Part Number: NA-40025-2
- Vendor Part Number: NA-40025-2
- Product Type: Hyperdryve piston kit
- Bore Size: 103.47 mm
- Oversize: +0.50 mm
- Compression Ratio: 11:1
- Fitment: Select 2016–2017 Yamaha Kodiak and Grizzly 700 models
- Fitment: Select 2016 Yamaha Wolverine 700 R-Spec models
- Compatibility: Will not accept OEM rings, and the specified rings will not work on an OEM piston
Fitment:
2016 Yamaha YFM700F Grizzly Fi 4WD EPS SE [IRS]
2016 Yamaha YFM700F Grizzly Fi 4WD EPS [IRS]
2016 Yamaha YFM700G Grizzly Fi 4WD [IRS]
2016 Yamaha YFM700K Kodiak [IRS]
2016 Yamaha YFM700KP Kodiak EPS [IRS]
2016 Yamaha YFM700KPS Kodiak EPS SE [IRS]
2016 Yamaha YXE700 Wolverine R-Spec
2016 Yamaha YXE700 Wolverine R-Spec EPS
2017 Yamaha YFM700F Grizzly Fi 4WD EPS SE [IRS]
2017 Yamaha YFM700F Grizzly Fi 4WD EPS [IRS]
2017 Yamaha YFM700G Grizzly Fi 4WD [IRS]
2017 Yamaha YFM700K Kodiak [IRS]
2017 Yamaha YFM700KP Kodiak EPS [IRS]
2017 Yamaha YFM700KPS Kodiak EPS SE [IRS]
2017 Yamaha YXE700 Wolverine EPS
2017 Yamaha YXE700 Wolverine R-Spec
2017 Yamaha YXE700 Wolverine R-Spec EPS
2017 Yamaha YXE700 Wolverine R-Spec EPS SE
2018 Yamaha YFM700F Grizzly Fi 4WD EPS LE [IRS]
2018 Yamaha YFM700F Grizzly Fi 4WD EPS SE [IRS]
2018 Yamaha YFM700F Grizzly Fi 4WD EPS [IRS]
2018 Yamaha YFM700K Kodiak [IRS]
2018 Yamaha YFM700KP Kodiak EPS [IRS]
2018 Yamaha YFM700KPS Kodiak EPS SE [IRS]
2018 Yamaha YXE700 Wolverine R-Spec EPS
2018 Yamaha YXE700 Wolverine R-Spec EPS SE
2019 Yamaha YXE850 Wolverine X2 R-Spec
2019 Yamaha YXE850 Wolverine X2 R-Spec SE
2020 Yamaha YXE850 Wolverine X2 R-Spec
2020 Yamaha YXE850 Wolverine X2 R-Spec SE
2020 Yamaha YXE850 Wolverine X2 R-Spec XT-R