The annual price difference is peanuts. It's the hike that will **** you if you make a claim that makes it not worth it. If you could pay your insurance, crash your bike, get a new one, and continue to pay the same rates, my answer would be much different and I'd have a new bike every year or two.
Instead, you pay out the *** for insurance, crash your bike, it doubles or triples on every vehicle you own for quite awhile. Didn't Chris Rock have a skit that explained this perfectly?
Insurance will always make their money back (from you) eventually. Might as well just pay it yourself and not deal with the hassle. Especially if you have more than 1 vehicle since the hikes apply to everything.
At least one of my accidents would've been a write off. I didn't cry. I'd rather pay the $4k now then an extra $2k every year for however many years. I know people that have at fault claims. They would've rather written off the car. At least then they wouldn't be broke just from paying their insurance rates that are now 3 times higher than they were before.
Maybe if your bike is worth $20k+ or something every year it might be worthwhile. Very few bikes hold their value like that though.