The Namura Hyperdryve Piston Kit, part number NA-40025-4, is designed for select Yamaha 700 ATV and side-by-side applications. Featuring a 103.97 mm (+1.00 mm) piston size and an 11:1 compression ratio, this kit supports reliable engine performance for powersports vehicles requiring an oversized replacement piston. It is engineered for compatible Yamaha engine applications and is intended for use with the appropriate oversized cylinder or professionally prepared bore.
This Namura piston kit fits 2016–2017 Yamaha YFM700K Kodiak IRS models, 2016–2017 YFM700KP Kodiak EPS models, and 2016–2017 YFM700KPS Kodiak EPS SE models. It also fits the 2016 Yamaha YXE700 Wolverine R-Spec and Wolverine R-Spec EPS, along with 2016–2017 Yamaha YFM700G Grizzly Fi 4WD IRS models. Always verify the exact model, year, bore specification, and engine configuration before installation.
Important: This kit will not accept OEM piston rings, and the included rings are not compatible with an OEM piston. Use the matching Namura components supplied for this kit and follow the manufacturer’s installation, clearance, and break-in recommendations. Professional inspection and installation are recommended to ensure proper cylinder preparation and fitment.
Features:
- Brand: Namura
- Manufacturer Part Number: NA-40025-4
- Vendor Part Number: NA-40025-4
- Product Type: Hyperdryve piston kit
- Piston Size: 103.97 mm (+1.00 mm)
- Compression Ratio: 11:1
- Application: Select Yamaha 700 ATV and side-by-side models
- Fitment: 2016–2017 Yamaha YFM700K Kodiak IRS
- Fitment: 2016–2017 Yamaha YFM700KP Kodiak EPS
- Fitment: 2016–2017 Yamaha YFM700KPS Kodiak EPS SE
- Fitment: 2016 Yamaha YXE700 Wolverine R-Spec and R-Spec EPS
- Fitment: 2016–2017 Yamaha YFM700G Grizzly Fi 4WD IRS
- Compatibility: Will not accept OEM rings, and the rings will not work with 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