If I guess, slight overheating and running rich due to compression loss.
Anyway, I would take a look at the old oil filters for debris.
Isn't something missing here?
You may have solved the issue with the repair kit, but keep in mind that also the sprocket needs to sit tight on the shaft. If there is some minimal play it will rattle loose after a while. Some aftermarket sprockets have to much play and an old oem sprocket that was loose before maybe too. In...
Most important when bleeding a closed cooling system is to have the radiator cap open and run the engine at idle. You will see that some bubbles will come up. At a certain point, (four bars in my case) the thermostat will open and an huge amount of air will escape. The coolant level in the...
Today I changed the coolant on my 701 Svart. Surprising how long the engine needed to idle until the thermostat fully opened and released all the air. The lower boiling point of water and an air bubble left in the system could have blown the hose on your bike. Better a blown hose than an blown...
I will try to give my opinion. If you’re done with all other modifications like exhaust/airbox and you have someone experienced with a matching map I would absolutely prefer the ecu flash.
If you’re planning further mods, you’re skilled and have access to a rolling road/dyno the Power Commander...