We’re actually going back in time to September 25th when I was riding with my friend Lauri from Karjalohja to Muurla direction.
This was one of the best rides this year!
But after about 150km’s My bike wasn’t running properly anymore! The idle running was ok but when I tried to twist the gas it started banging and didn’t take more rpm’s. My friend behind me said that there is gas smelling.
We had some tools and we opened my airbox to check if the problem is there? It wasn’t…
So I decided to give it a try and that was the correct decision because after few km’s I was able to ride normally…
So we were able to ride the whole day but the problem didn’t disappear!
One friend of mine took the bike and I asked the he would do “full service” in the same time as he was trying to find what was the problem.
He had the the error reader so he just plugged the tablet that was connected to my bike and we got this:
The Speed sensor (RPM) is actually the same than so called crankshaft position sensor that gives the signal to the ignition. So it was no wonder that the engine didn’t run properly anymore. But was the sensor broken? Or was the problem somewhere else?
After the engine cover was taken off from the right side it was easy to see what was the problem!
The whole sensor was covered with some small parts of metal or metal dust.
I had done the last oil-change already more than 2 years ago (and 8000 km’s) so it was a good warning about what happens if you don’t do service often enough!
After new oil (Motul 5100 4T 15W-50), new oil-filter, new spark plugs, new air-filter and new coolant water my bike was running perfectly again!
So no sensors were broken.