Hi all- My friend has a Ktm adventure 990 R and we are in the process of doing some needed maintenance on it. Valves,sparkplugs, fluids etc. the list goes on . I had a question about something that came up. So we took off the airbox, his rear throttle body is all dirty/ oil residue in there. In my 990 when I did maintenance the bodies were both dry and clean. He also told me that the rear spark plug was very wet. Also occasionally his bike would smoke a little bit and backfire. I was thinking his bodies need to be synched? Anyone else have some input?