I would think it would matter more if you have full coverage and had a claim. If you bought a new bike and said you only ride 3000 km/year and there is 20,000 km on it when there is an accident, obviously they would value the bike less with 20,000 km vs 3000 km and they would probably have some questions for you about why you did not inform them about the increase in use from what you originally reported.
At best you would get some static from them, but they could deny your claim based on inaccurate information and could even possibly charge you with falsifying insurance information, which is grounds for discontinuing coverage and there might even be a fine for that sort of thing. Either way, good luck getting insurance again if you ever have coverage discontinued for providing false information!
Personally, I've never had full coverage on a bike. My current bike would maybe be worth $3000 black book. The accessories on it don't add $1 to it's value. I've quite forgotten the price of adding full coverage, but I remember calculating that if I rode about three or four seasons without a write-off, I would basically break even at that point. After that I could quite literally write off the bike and still be up money vs paying the premiums. Been riding 16 years now and have never had full coverage, and knock-on-wood, I have never needed it.
