Kawasaki KX450 Garage Build Project with Twisted Development
The 2026 Kawasaki KX450 build, named Roxy, was initiated by Jamie Ellis from Twisted Development to enhance the bike's performance. Initially viewed as a slow machine, the KX450 underwent significant modifications to improve speed and handling. Key enhancements included headwork, custom piston and valves, a mapped ECU, and upgraded throttle and transmission components.
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The 2026 Kawasaki KX450 build, named Roxy, was born from a collaboration with Jamie Ellis of Twisted Development. The aim was to transform the KX450, which had a reputation for being sluggish, into a high-performance motorcycle.
Modifications included headwork, epoxy porting, a custom piston, valve seats, and a mapped Vortex ECU, as well as enhancements to the throttle body and transmission. Additionally, the bike received 23mm offset split triple clamps and anti-twist bar mounts. This project sought to determine if the upgraded KX450 could achieve extreme speed while remaining manageable.
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