Hi everyone!

I own a cbr250rr and been having quite a few problems with this bike.
I actually thought I fixed most problems but today after riding it I noticed a weird sound from the exhaust. Sounded like how it was off before I got the carbys cleaned out. Before it was cleaned out, the bike was running sluggish, and it wouldnt go. It started only from low rpms to 6-7k. After that it was running like normal and also sounded like normal. What I mean is not normal sound was like it sounded as you are either missing a cylinder or ninja kawasaki LOL.

Anyways, today I noticed between 4-6k rpm it sounded a bit off, power is still there though. Spark plugs were also changed recently so I dont know what it could be. Fuel filter was changed as well.

Another factor is I only get 150km out of the tank before I reach reserve, and I thought it was normal untill I checked up what others get.I dont know why the bike runs so rich. The only mod the bike has is a screaming demon exhaust.

Thank you for helping me!!