Yeah, I remember there being a lot of differing information on float height for our 450's. Mine was set to 23.4 mm when I opened it up originally, and then I tried 26.3 mm for awhile based on some info I read somewhere but didn't have much luck, so reverted back to 23.4 mm.rekidiw said:alright thanks for that. if youre running the same carbs/floats and all that as me thats a pretty high fuel level! could be some different stuff though. it seems there are about 3 different settings for the gs450. i think that would be around a 3.5mm fuel level. Im currently at 26.6 with a 6.5mm fuel level. not sure what that means exactly but ive been fighting finding the best height since the manuals are all mixed up..so thanks i may try raising mine a bit. I was thinking that would be way too high but you seem to be running fine on that.