Carburettor and coupling problem GPX 600 R

Hello Before I start briefly to me. Have healthily LRS. Before there are again stupid sayings about my text here. My problem on the motorcycle is as follows. Had bought this part and ran there also great. However, a test drive was not possible through the weather. ( Rain and ice on the road ) In the stand she left herself switching with running engine. When I wanted to drive the part 3 weeks later the carburetor ran over and so strong that I even had to change the gear oil. When I put out the clutch cable, the clutch did not release any more. Now the clutch is pulled than it is. What can this be? Will I get the one where I remove the clutch basket and put it back in properly? How do I get the dirt like light rust from my tank? What do I have to pay attention to when disassemblying the carburetor battery? What can I possibly get to who I do this two thing? I ask because I never had such problems with my Suzuki. Maybe you have heard or read these problems already 1000 compartments. I still ask for relevant instructions ! Mfg. Uwe