carburetor and airbox problems

[dillon.murphy1]

i have a 1990 h2 model which i think has been fitted with a racing set of cr flatside carbs and a different airbox. there are plastic slieves bolted to the carbs and the bellmouth shaped rubber seals fixed inside the bottom of the airbox that just sit on top of the slieves. this is different to the airbox - carb arrangement in the h1 - h2 microfiche pictures. theres no brand names on any of this stuff only a few part numbers. does anyone know what this stuff is as i need new airbox seals as my ones are knackered and the bike isnt running properly because of it

[cargo]

Some pictures would be a help if you can