How to ID a carb?

[Silverflame]

As above realy,
I have a 2001 1200s sporty and would like to put a different, smaller air filter on, seen a s/h high flow filter from k&n but its from a Mikuni hsr42 to fit a twin cam and just dont know if it will fit
thanks
sf

[Limey_Dave]

Check filters here

K&N Custom Air Cleaners & Filter Assemblies for Harley Davidson Motorcycles


Check carb here


Allens Performance Mikuni & Keihin Carbs