remember this only applies to mikuni fi throttle bodied x lites dont get off track 2011 te310 had a 4 port injector for sure , txc310 2012 modelhad the 12 port injector i essentially converted my 2011 blackhead into a 2012 txc310 blackhead with the injector/ecu oem kitted te-race package, mine has a 2010 tc250 ti muffler withe the sa/db cap installed and runs perfectly from day one up untill now with its new owner...this fyi. lots of trail and racing comp, always runs flawlessly with this set up
the tc ti muffler weighs 4lbs less than than the oem te muffler and is shorter, the weight difference is instantly felt while riding the bike, if you can source one i highly recommend it..
i believe 2012 and newer mikuni fi xlites all have 12 port injectors.
The 2012 TE still has the 4 hole injector.