We have hauled and loaded all 3 of our Spyder's in either one of the Toy haulers we have owned with no issues. The '08 GS se5, the '12 RT-s and the '14 RT limited. As others have said, might have the Bike checked out.
As to strapping them down, per Canam and our Dealer, load the bike, set parking brake,-run a ratchet strap through the back wheel and anchor slightly to the rear, use 2 additional ratchet straps, hook on the a-arm out by the wheel on each side, either center point anchor to the trailer or cross them in a "X" pattern, release the brake and ratchet tight. Re set brake and you are good to go. After several oop's over the years from broken straps and such, Don't cheap out, buy good 1500 LB plus rated straps.
Martin & Wendy
Jessica & Alex
Sundance the guard dog
'15 3500HD C/C LTZ BLACK
LMLD/A 4X4,B & W HITCH :B
'12 3500 EC/LB SRW
'13 Raptor 381LEV W/GOODYEAR G614's
4 Honda ATV's,:B '14 Can-AM Spyder RT-Limited :B
Ralleys attended 17 and counting :B:B