I care take two 03 volusias . one is bone stock and the other is My raked out P.O.S. ,, anyway the stock one always smelled of antifreeze while riding it . Finally convinced the owner to let me lift the tank and check the radiator cap. . The coolant was low ( after 5 yrs duh) and the cap itself had a lot of dirt built up on it So it wouldnt seal properly. .. reused the cap .. they are 33 dollars at the dealer.. so just cleaned and refilled (about a pint). smell gone and the fan is not kicking on as much.. Now heres what I dont understand ... Even given the fact that there is a siphon action between the resevoir mounted down low on the frame and the radiator cap mounted at the highest point of frame , theres still three feet of hopefully coolant filled hose between them . I dont see how the radiator can reliably draw-in coolant after the bike cools down .. the distance and difference in height is too great , and just let that siphon hose drain one time , and it will likely suck air/ dirt instead of coolant 4ever more. .. My contention is that suzuki just put on a " catch can" for the fluid .. there arent any "hot/cool" markings on the overflow tank i can see.. So .. take the time to check your resevoir and maybe even lift the tank off the bike once in a while to look down the radiator cap . .