Noooo---Noooo---Noooo don't knock it. It's a safe, very cheap and very effective way of tailoring the bike's performance to what you want. In California apparently, a huge number of riders (of loads of types of bikes) drop a front tooth to bring the bike up to pace, because they're so heavily down-tuned for emissions there.
To be honest, I don't know why I haven't done it meself. Drop a front tooth, gain a second or two up the 100 but lose a few mph off the top end, where I'll never use it anyway
Actually, the reason I haven't done it is the speedo thing, it would pss me off even though I have sat nav which is always there.
T'other question I suppose, might be--- IF I had a bump away from the lights (SMIDSY or similar) AND (whilst it's unlikely)the insurance assessor noted the mod- would I be insured? Personally I think probably not
Anyhow, nuff bollixx--- there's more threads to fck up than this one
Eliminate the impossible. Whatever remains, however improbable, must be the part you forgot to service.