1 Rough and humping idle + ticking sound from the valve cover side K1100RS 1996 Tue May 16, 2023 5:16 pm
Saints
active member
So the bike is K1100RS 1996 and it has roughly 130 000km on it. This is my first bike and i have basically no experience with motors, in any vehicle. But i think i am doing OK, this forum and others have been a gold mine for knowledge. I will take it to the shop only as last resort.. trying to learn how to take care of it myself. It was running last summer and a lot has been renewed during winter days. After all the parts I found out to be defective and replaced, I would have assumed that it runs better, not other way around..
Against all odds it started after the rebuild. It is running rough on idle, not very good, have a look at the video. In both videos it is running quite cold, less than 5 minutes.
It has..
-new throttle body rubber boots (old ones had cracks)
-used but good throttle body to airbox rubbers (old had cracks)
-throttlebody butterflies synched with the water method.. so that same amount of water flows through
-new air filter
-new fuel filter
-outside of the tank all fuel lines new
-new injectors EV14
-new NGK 5ohm leads and DR7EA sparkplugs
-valves clearances adjusted.. 10 new cam followers.. (sadly after adjusting one is still out of range. it would have needed 2.45mm cup, but only 2,50mm was available)
-new crankcase breather hose
-new hose that connect on back to all four throttlebodies
So basically everything that is connected to air intake is renewed, so not likely to have leaks there (didn´'t check with gas...yet..)
And gasoline distribution should be in order, at least it was running last summer and now there are renewed lines and new injectors.
When i removed the exhaust, 1&4 were black on the inside, as one would assume.. but the 2&3 were white. Then proceeded to see if the plugs were different colour, but they were all so black and covered in oil that i could not tell. But leads were in awful shape, very corroded, previous owner had put NGK plugs without those hats, so it had arched quite much.
After it didn't run so well, i took the spark plugs out to see if the gaps are okay, they were all between 0,6-0,7mm. But the colour was different, once again 1&4 were more black, and 2&3 white. Considering that it had been running max 20 min, quite noticable differences. Then put it back together and sprayed water to exhaust pipes, to see if pipes are hot evenly. But 1&2 are noticeable colder than 2&3.
Is the most likely defective part causing bad ignition in 1 and 4 cylinders 1&4 ignition coil? Connectors that connect to ignition coils both give 12V on one of the connectors. Am I on right track here? Or can there be problem with mototronic?
Second problem is that ticking sound.. i have read that i could be caused by bad timing chain tensioner, but the sound seems to be coming more from the back side of the motor. Another is that the injectors are ticking.. but not sure about that.. what are the expert opinions on the ticking sound? The slightly tight valve is cylinder 4 exhaust, it should be 0.25-0,30 but 0,25 does not go between.. only 0,20.. if it is so tight that tills.de does not even sell cam follower that thin, what is the next thing that must be changed to fix that gap?
Trying to gather all the needed parts in one order.. but as i have experienced, that rarely is the case
Best Regards
Saints