My motorbike is a DR BIG 5/96 which was imported from Germany to Greece and has already done 63000 km. the problem is that the motorbike doesn't work properly until 3000-3200 RPM when you give throttle either with gear or without gear. not even when you start the bike where the indicator judders (I don't know if I'm using the correct word) between 1300 and 1400 RPM.
as if there is no proper mixture of gas and air or as if there is an electric problem.
note: the motorbike is the TPS model.
I would like to know if other bikes had the same or similar problem and if there is any solution.
Thank you in advance!

Motorcycles - Suzuki - DR 800 S - 1994 Suzuki DR 800 S