How often is the Spring Breeze 250sr spark plug replaced?

Change it every 40 thousand kilometers. Spring Breeze 250sr adopts a single-cylinder water-cooled four-stroke engine with a displacement of 249.2cc Feng Chun 250sr is a model owned by Feng Chun. As a domestic brand in China, Feng Chun opened its own world in China in the early days by relying on nk series models, which made the dynamic performance and handling performance of this model excellent.