I have a 2007 model with an Arrow pipe K&N aircleaner jetted intakes port matched. It runs hard in the Australian bush tracks, I have changed the gearing to 17 tooth front sproket and a 44 tooth rear to cope with rocky hillsides and such and it still runs out to 180 kilometres at the top so you wont have any problems keeping up with anyone on dirt roadsitĀ“s the most fun bike I have ridden for years and will suprise your freinds on thier more modern style machinery