what bike for a 7yr old

[swazi_matt]

My son has been on an Oset 16 since he was about 4, and while it is great for the garden, he now wants to ride with me and on an outride the batteries last an hour max and he is always full taps now. (the balance he has developed on the oset is amazing, i would say better than me!)

I am more interested in easy enduro (single track etc) rather than MX. MX is too dangerous IMO and the whole mommy/daddy competativeness is not something i want to get involved in.

he is quite tall for 7 (closer to an average 8 yr old ... hmmm tall, better balance than me ... who is this kids dad!! ;-) so wanted to know what the options are for his size (bearing in mind he has a younger brother who gets all the hand-me-downs so doesn't necessarily need to last very long size wise)
There is a ktm50sx available here that needs some work, but reading up on it this does not seem ideal for trail riding - small wheel and agressive engine - so looking for other options