My 2011 RT-SM5 started having horrible fumes and dripping, not just drops, about March, 2012. Never knowingly overfilled it, as it takes too long to get it above about 5.2 or so. Anyway, changed canister, filter, wrap everything, sheets of heat stuff on tank, etc, and ran the tube to the rear to get the gas away from the pipes and CAT. Still dripped, smelled and had to leave it out sometimes. Second canister and more things covered with heat sheets and BRP said "too bad, because we don't have a problem, you do." Did the canisterectomy and it all stopped.
Please don't ask me why, I don't know except that it worked and continues to work 2 years later with 45,000 miles on it. Did the CAT also to reduce heat about a year ago and it helped a little, but my thighs were red as a lobster on Monday with OAT of mid 80s and also on Tues - did 260 miles or more each day in the north GA hills/mini mountains. I'm really happy with the elimination of fumes, smell and dripping and being able to use the garage doors again to keep the critters and birds out. My tom cat took care of critters most of the time. Heat is sometimes a problem, not always , that continues to confuse me. I put the adjustable vents on, heat shield on lower right and have the adjustable windshield also, etc. BRP really needs to wake up and put a fan under the cowl or some such simple solution. The old CB 750 Hondas were hot, but nothin like the Spyder on occasion, my legs were like crab legs this week and it was barely hot out.
This is the only lingering problem the Spyder has had. Couple weeks of check eng light lately, tech nailed it yesterday and found a corroded connector to the fuel pump regulator, which shut off the fuel pump for a micro second, fluctuated the voltage for another micro second, which shut off the steering motor for several minutes at a time, but no light. Everything suggested voltage reg or magneto problem, but he noticed a past reference to PO174 on BUDS and followed that to the regulator. Bike ran like a charm the whole time. Sounds crazy, but all is well as far as I can tell, which of course, proves nothing. Time will tell.
Tuck