Due to poor English, could not come up with a better thread name (
However try to explain in a short story
I have some floating problem that kills me and which I can't solve for a long time.
Sometimes my bike is perfect. Runs fast, sounds well.
- it begin to sound strained. It seems like added some metall and bubbling notes into muffler sound. I could compare it with the car working with potatoe in muffler. Also some popping in muffler (rarely in airbox) appears when gas at idle.
- Engine vibrations increases very much, mirrors at idle vibrates so that I couldn't see clearly, only could see blurry silhouettes.
- And in addition to all previous simpotms the bike loose its power a little. I mean its felts some laziness in acceleration and RPM rising afer 6000 reluctantly.
- After long ride bike smells more then it should, I think. I mean a smell of gasoline, exhaust gas and something else ))))
All above mentioned symptomes as usual comes after 15-30 minutes of riding the cold bike. In hot weather (more then 15C) they comes a bit earlier, when it's cold - a bit later.
No errors in memory of ECU and never FI light goes on (except my own interventions).
The bike is 2007 year. I've bought it with 9000km at odometr and it seems like true milleage.
I've mentioned this problem at 11K milleage. But as my first 2K millieage on this bike were on the road from Moscow to Ekaterinburg where I've mentioned nothing, only the road and +5C temperature ))))
So I think the problem was from the begining.
What was done:
After purchase all fluids and filters were changed. Spark plugs were changed.
Thermostat was changed.
vacuum synchroniziation was made
Compression measurement was done (16 kg/cm3 each)
After finding this problem first time:
I've checked the condition of spark plugs again and found that right cylynder spark plug have a bit black plaque on the insulator, but not the left.
I've swapped ignition coils, done 300-400 km - nothing changes, right spark plug was a bit worse then left.
Then I take off nozzles and put them into nozzles test stand.
Then starts testing six times for 15 seconds each - left nozzle always poured 82,5 ml, but right nozzle 2 times poured the same but 4 times poured 87,5 ml.
Decide to relace right nozzle.
New nozzle was ordered and replaced. Vacuum synchroniziation was made again. Spark plugs were changed again )))
Nothing changes. Still have above symptoms.
Then valve clearance was checked - inlet were ok, outlet were near lower border and have been adjusted.
Vacuum synchroniziation was made again.
And what? You understand, nothing changes. Still have above symptoms.
Then I check the resistance of all sensors comparing to service manual - everything ok.
Then I have disconnected O2 sensor and ride without it about 20-30 minutes. FI light is on but otherwise nothing changes. After some time of riding same symptoms.
Then I have disconnected IAT sensor and ride without it about 20-30 minutes. FI light is on but otherwise nothing changes. After some time of riding same symptoms.
During above mentioned body movements I've ride 6000 km
Yesterday I've made one more attempt. Despite of the fact that exhaust pressure from muffler seems to be high - I descide to check the cat.
I removed O2 sensor from muffler and left a hole. And then ride.
First impression was that birds falls down when I open the throttle.
Second impression - no symptoms. I've ride about 30 minutes - bike was perfect always. RPM easily rises to 9000. No vibrations. As for symptom of metall and bubbling sound - can't say nothing, see impression number one
Very happy, I put O2 sensor back and want to ride home to check how to remove the cat.
But then some problems appears. With O2 sensor installed I ride about an hour - no symptoms at all. Perfect bike with perfect acceleration and sound.
Today have a ride again to check if something changes. First 50 km - everything was fine.
Then appears symptoms of strained sound with metall and bubbling notes in muffler. And light vibrations comes to me.
But acceleration was still perfect, very easily rising RPM until 8000 - 9000 (did not twist above these RPMs).
After that I've done about 100 km within a day. And still the same. Bad sound and light/middle vibrations, but perfect acceleration.
So now I'm at a standstill
Can't explain this behaviour and my idea to take off the cat seems not very good for me now.
The main problem for me is that I want to extend summer and go for a trip about 4-5K km at the end of next week, but with this floating problem a bit afraid to do this
People, who could read until this point, are worthy of a medal from me
If somebody could understand at least smthng from my writing and have any ideas - you are welcome )))
I'll be very appreciated for any ideas )))