





The WISECO 4T Forged Series piston kit - ø96.00mm (manufacturer part number: W40089M09600B) is designed for motocross riders and tuners who are replacing a worn piston or performing an engine overhaul. Made from forged aluminum, this piston is part of Wiseco's Forged Series, a brand recognized for nearly 50 years for its high-performance components for off-road motorcycles.
This piston is suitable for installations requiring an oversize B and replaces original parts on certain motocross engines. It is particularly compatible with Honda CRF 450 R (PE05) models from 2014 to 2016, among other compatible applications based on bore and construction specifications.
To ensure reliable installation, adhere to bore dimensions, adjustment recommendations, and perform proper break-in. This kit fits into a high-performance overhaul without unverified promises: it provides a forged part that meets the specified dimensions and is ready for careful installation to restore the reliability of the upper engine.