Hi guys. First post here...wondering if someone can shed some light on an issue that could be a big deal. I put about 12k miles on the bike in a couple of years, by not having a car, and then ended up not riding for 3 years. I forgot to put the stabilizer apparently since the can was found right under the cover. When I realized this I took the tank out and dumped it but the carbs jammed anyway and I had to put Seafoam in anyway. I needed the bike to start, so it can be illegible for a move out of state, and I dumped 5 times the recommended amount of Seafoam as a last ditch effort. It worked, but now I get a knock that gets faster (and less noticeable) with an increase in RPM. I don't hear it while the bike is cold but usually only after I've been ridding for a while and the engine is warm and then it's only noticeable while idling. This F3 is my baby and although I had to dump the Seafoam in there I have to say that I should have just paid someone to clean the carbs instead of bruteforcing the engine to start but what's done is done. I took it to two mechanics and both have said the knock is not a big deal and that I should just ride it for a couple of hundred miles and see what happens. I'm afraid I'm killing my engine slowly and would like opinions on what to do next.

 

Did you change the oil on the bike at all? Before/after the seafoam?

 

Yes I changed the oil at the dealership. The dealership was 40 miles away. I pulled into a gas station after about 30 miles on highway, first time riding the bike, and that's when I heard it. The mechanic who changed the oil said there is nothing wrong with the engine (he worked on it cold). I then took it to a farther mechanic who said it's a faint knock and I shouldn't worry about it.

I still have Seafoam in tank. May be I Should take out the fuel and start over.