My CBR 600 F3 from 98 has a strange issue, I bought it 28 January this year, drove the first time 15 March without any problems. I drove that week for about 400km on 2 fuel tanks until my tank was almost empty. The bike bogged and ran on less cilinders, pulled clutch it and the bike stalled. Fuel pump was going crazy the bike shop adviced me to replace my fuel filter. Still after that the issue presist, after refuling i made another 200km without any problems. So my conclusion was that my reserve was clogged/not working. But 1 week later with a full tank my bike starts difficult and drove about 300meter and bogged down again. After some difficulties it started 10 minutes later and i drove another 100km withouth any problem.

This is a video of a cold startup after 1 week no use

Any ideas?

 

Classic carburetor issues. Idle and slow circuits getting clogged and enrichment circuit too. Fuel pump might be struggling as well. If you put your hand on your fuel pump, you can feel it while your turning it over to see if it's pumping or not.

 

Since your fuel got critically low you may have sucked up some crud from the bottom. If your petcock has the strainer on it I would check that as well.