Float valve seat size

[StreetFzr]

Should be 1.0 on the 600s

I would strongly recommend against cheap replacements and only use quality seats & valves.

But.... why are you changing them?

What's yours symptoms?

Thank you...
My bike was severely flooding and overflowing, seals had perished from standing. I will admit I was cheap and ordered a cheap rebuild kit and the ones they sent out was a 2.0, prompting my OP. 
Bikes sorted now runs brilliant.

All you needed were new New O-rings which are cheaper and better than any spurious float valves. the Mikuni originals are a very high quality item

I just decided to get a new set anyway after I marked a couple getting them out (2 were seized in)

for some reason the 600 carbs suffer more than the 1000! the valves can and do get stuck and cleaning them isnt always enough to free them up! if you can get the seats out undamaged then yes they can be re-used but thats easier said than done sometimes.

Ive had to search far and wide for #1.0 seats, tourmax who have always been the ones id use as a last resort advertise them for the 600 but they are actually ~#2.8 so almost 3 times as big as they should be!

Glad you've got it sorted though

Im tempted to buy a set as the bike will sit over winter so ill bet I have to do it again after lol the spare set i have here is a 2.0 but id rather stay at the oem as the hets are oem size. Anyway, thanks for the input ? ?