Hi all I am completely new to the off road scene and have bought a XR400 which is fantastic but on my last ride out I got a puncher, Doh! now having never had to deal with inner tubes on motorcycles before how do I find out what size replacement inner tube I need ? does it say in the tyre I have a Pirreli MT43 fitted and none of the numbers on there are familiar to me. Also what are the best inner tubes to use ? Dazed and confused.