Hi gang hope to pick your expertise.
I have a 2008 Ninja zx6r with 12,000km on it (yeah, I don't ride it much, mainly around town).
I am doing the 12,000km recommended maintenance myself as recommended by the repair manual. So I am doing the usual (yearly oil & filter, yearly brake fluid and coolant change every 2-3 years and spark plug change).
The manual also recommends other replacements such as changing the fuel hose, radiator hose, brake hoses and rubber parts of master cylinder. On inspection - all these hoses and master cylinder looks great (no cracks or tears or aging). Is it necessary I change all these hoses given they look to be in great shape (again - not a lot of km on my bike).