New inlet rubber for the carburetors

[celticdog]

Here's the rub, the carbs on the fzs 600 are now heading for being 20 years old. To put it bluntly, they're getting focced. It may be that replacing the inlet rubbers is not the answer.
There are plenty of used carbs on ebay, some will be usable, some not. Either way if they've done the mileage on a 20 year old bike they're going to require some attention.
Brass tarnishes over the years and rubber perishes over time too; in an environment of petroleum mist and any fine particulates that get past your filters it's no surprise if your throttle response
isn't great when you put the bike under load. In the past I've changed the plugs, plug caps, TPS, air and fuel filters, and cleaned the airbox till it gleams all to no avail. Turns out as I use the bike for commuting
in all weathers, I was getting a bit of water leakage through the petrol cap, once I replaced this things were better but not perfect. The bike runs better in good weather! Anyway my point is the carbs need cleaned and balanced regularly and in some cases it's worth replacing the O rings and other bits as required. Just my tuppence