I'm working on the storm during these days, the bike is quite old and need some manteniance.
I did things like greasing swingarm and shock link, change plugs, clean main chain drive ecc ecc..
The previus owner fit a BMC air filter in the airbox, near the carbs "trumpets" I found some (a lot of ) debris mixed with oil and dirt

I never found dirt inside of an airbox, shoud I must be worried about some loss of compression?
P.S. the bike run fine, no blue smoke from mufflers
have a good week end
