Try Insure and go they cover me I aint no chickin and I am on a 1100GS BMW
15 days to Sardinia and 2 other trips it aint cheap and there are a lot of questions
Before I found them i spent an hour answering a set of questions to one company to find the cc limit was 125
Also when in the USA last year I&G covered me for risk sports including ski-ing (dont know why I never do foot sledging) and motorcycles of any size but they said they would not give cover for fishing!, I said thats OK I have never done any thrashing or dangleing and not one worm have been drowned by me.