i had the bike allready and took the class to lower my insurance. if you have a bike and can ride, it will only help you to utilize it to its full potential and hone in your street skills.if you dont, take the class first. either way, take the class, its a hell of alot of fun.

 

I think get the ride first.
Become familiar with your ride, weight of the ride and learn the basics before riding thru cones after the wellinformed education. Get comfy then take your class. Too much info at one time is or can be a detriment.

edit: My opinion of course

 

AND........ the little bikes they use at the msf are nothing like what you will be riding in real life, unless your getting a 250, then theres a comparasion.

 

MSF class taught me alot althoug I have ridden before. Either way you go practice never hurts.

 

I bought my bike first but I took a course before I actually drove mine. Well worth every penny it cost me to take the course! I highly recommend taking it!