If this hasnât already been figured out and posted, here it is. Iâve got about 2200 Km on a 2005 640 Adventure and have encountered âSudden Death Syndromeâ three times. All have occurred at low RPM. The first occurrence, now that I think about it, was the most telling. The bike made a little compression cough and died. I took the problem to the KTM dealer and initially they were stumped. I kept on pushing and they kept on digging. This is the explanation that I got, and I think theyâve nailed it. The bike is new and not broken in. The jetting is stock and lean. These things contribute t a rough idle. When the idle is rough and bouncy sometimes the automatic compression release mechanism will engage and kill the engine. The answer; let the bike break in, play with the jetting, air box and exhaust until you are happy with the performance. At this stage the idle should be much more stable so you should be able set the idle speed lower while also preventing the auto compression release from killing the motor. Creeper, Your thoughts? Itsagas
just bump up th idle a couple hundred should fix that. sounds to low if it stumbles and the decomp starts clackin. Jet it and set the idle up. likes to have a high idle anyway.
