He only looks like a wee nipper Anark

Looks like Clay Pigeon Raceway, but that be in deepest darkest [accent]Dooorset[/accent], had some good times racing karts myself, although we had the twin engined prokarts. Your brother looks like he's got the good old 100c 2 stroke there - better in my opinion, more fun.
Been a long time I'm afraid, doubt if I could even squeeze myself into the kart anymore, which is a shame because I used to have to have the most lead weights we could muster & a lead strip between myself & the seat - just to meet the minimum weight requirements

Give your brother a [smiley=thumbsup.gif] & all the best for the coming season.
TSC.