Just after an opinion on Caviga Mito 125's. I'm interested in the 125's because I want to start racing them. I initially intend to ride the bike on the road, and when money is more in abundance, I want to start racing it. Just want to find out: What signs should I be looking for in second hand models? What's required in terms of maintenance and is it expensive if I do it myself? Do the bikes need frequent rebuilds if riden moderately? Also, what other bikes would fall into the same catagory and be insurable? thanks.