G’day all. I’m in the proces of buying a new (secondhand) bike. I have basically decided on either a 2 stroke 250EXC or the 4 stroke 520EXC but have no idea which one to get. I have experience with 250cc MX bikes but have never owned or riden a big bore four stroke for any great period of time. I’m an average and the bike will be riden mainly for fun with my mates/club days etc. and in the odd enduro. In short: Whick bike has the smoothest and most tractable power (ie. is the easiest to ride)? Which bike is the easiest to handle in the tight stuff? Whch bike requires the most time spent on mantiance? Which bike is the most costly to maintain? Which is the most relable (any mechanical flawws in these models)? I will have to keep the bike for around 3 years no $$ to upgrade every year so which bike is the most likely to remain in good condition for longer (assuming good maintinance)? I know that I would like the ligher weight of the 250 but I hear that the 520’s have a smooth, wide and easy to use power and and they sound so good. Over here in Oz land a 2001 250EXC goes for about $7000. A 2000 520EXC goes for around $9000 which will require a visit to the bank manager – this a large factor in my decision. I am 185cm (6”) tall and weigth about 92kg (210 pounds). My riding terrain consists of about 50% tight sigle trak with snotty steep hils and 50% open fire trails etc. with the ocasioal spin about the loal mx track for a bit of fun. And just incase you a re still reading just two more questions. Are there any mechanical worries I should look for when buying either of these bikes secondhand? And what about the possibiloty of riding a 520SX in the bush – these are cheap to buy compired to the EXC’s but would the suspension be too harsh, and the 4 speed gear box? Thanks in advance for your help people.