is it white smoke or blackish smoke .....did u sink it before u got the snorkel cuz ur cylinder could be scored now...takes some time....if it is gotta bore it out and get over sized piston and rings....happend to my old 02 450s 3 times...cost me like 300$ to do it myself.... if that isnt the case after u snorkeled it did u adjust the fuel air mixture? maybe ur running lean or what not.....but i doubt that ur cylinder probly got scratched
ive looked on this site many times......but those pics made me wana make a account......ive rode there many times.....i live 5 mins from i 75.......we cross under the lil bridge type deal right before the toll boths.....only can in the winter even with the snorkel on the 450 to deep in summer.......that place is awesome the bus camp with the lake in all....last weekend went to the swamp buggy races from in there...been to the camp with the water pump thing but never seen that swamp