Please bear in mind that your insurance premium isn't just to cover the cost of replacing your scooter, it is to cover the cost of any potential damage your scooter can make to other road users. Younger people are in a high-risk category as they tend to cause more accidents than say, over 25's, so their premium is usually much higher than over 25's. To be in the lowest category (apparently) you need to be a single female over 30 living in a middle-class area not within 100 miles of a motorway, with no previous convictions/claims, so a sex change may save you a few quid..... In answer to your question 3rd Party F&T is good if a) you're a safe driver (and not likely to be liable/the guilty party for any accident) or b) willing to write off the bike if you are liable? (or pay to have it replaced/fixed)