The 2013 world champion has endured a miserable start to his return to the series after a season away in British Superbike, scoring just a single point in last month's Assen round with a 15th-place finish.
A brief statement issued by Kawasaki billed the split as Sykes "concluding his term" with the one-bike Puccetti team, but the British rider had previously been announced as Lucas Mahias' permanent replacement for 2023.
