While I do admire people who do lots of mods including big bores, it always seems to me that if you want a larger bike, you would buy that instead of a small bike. This comes up all the time. People take 50cc scooters and bore them to gain additional power. It is generally a lot less trouble to buy a 100 or 125 cc scooter which will outperform the 50 even with a bore kit. At least in the US, where there are not different licenses for different sized bikes, the benefits are not there to me. Getting mirrors you can see out of is a different matter. LOL I doubt I will do any mods to my Grom, since I've owned 30 bikes or so and other than changing mirrors have never modified anything cause if the bike doesn't perform how I want, I buy something that does. We are talking about new bikes here. If I acquired a bike cheap or for free and it didn't perform well, then I might very well do some performance mods, but to take a perfectly good bike and start modifying it...never. If it ain't broke, don't fix it has always been my motto.