mine aint got extenshion or rubber boot that fit into frame ,it sits just short [dont really know what it for or why ,perhaps to route choke cable!]the dams i am talking about are under the plastic infills at side of tank just about below the silver securing bolt that you see from top looking down ,or jut about whare intake is cut into fairing for carbs air..if these aint right she will draw hot air from oil cooler and turbulent air from front of bike...i had this problem before ....got bike set up on dyno and she run great but on the road run like pile of shit at constant throttle...some whare on the site this has been discussed before and a diagram of infills/dams shown..some on here have even made there own out of bits of plastic..just check them to be sure they are still there.and fitted correctly...