The deal for kit bought from authorised Kawasaki dealers from 1 January was an "industry-leading warranty", said the company.
It used to offer two-year deals but now professional users could enjoy three years’ cover while private customers had a five-year warranty.
Kawasaki said it was the first to offer a two-year warranty on power products for all users including professional when the range was first launched in 1996.
Senior product manager Jack Ford said: "This warranty adds value to our power products and is being provided at no extra cost.
"We are confident in the quality and reliability of our products and this deal should assure customers of trouble-free ownership and better control of total costs."
See listings and and specifications for Kawasaki machines at WhatKit.co.uk.