I am debating which one would be better, 2 stroke or 4 stroke? My main concern is their reliability and repair costs. I know in most case, 4 stroke should out last the 2 stroke. But the repair cost for 4 stroke is way higher. I also seem some nasty damage on a 4 stroke dirt bike with less than 20 hours. I had a 95 Kaw 900ZXI for 7 years and it was good until the crank went. Any suggestion?