Hi eweryone!
I have problem with my Yamaha Dragstar 400.
After standby winter time, farest cylinder begin works inaccurate. On idling it wasn't work at all, cylinder begins work if I close a little the manifold collector of carburettor. Sometimes I hear bangs or pops in the chambers of carburettor.

What can be wrong with it?

Hi

If you haven't run it for a while it may be that the carb has gummed up with the additives in modern petrol. An Italian tune up* may work, failing that a strip down and all jets, airways etc will need cleared.

* Give it a good thrashing

Hi Jimmy!

All of this is already done, but results are the same.