People ride allsorts, a guy rode with us on the Teeside and North Yorkshire Fun weekend on an early 80's XL125 with no problems and looked like he thoroughly enjoyed himself.
See here..........
http://lancashiretrf.free-forums.org/te ... vt124.htmlAs long as its well maintained and reliable it should be fine for gentle greenlaning.
In my humble opinion, some people will tell you you need the latest £5k enduro bike and they can probably only ride it to a small percentage of its potential, bearing in mind that we should not be treating lanes as racetracks. Best to see how you get on with a run and try to ride some friendly group members bikes if you get a chance, before you spend loads of money.