Hi all,
having a few issues with my cbr 600 f4, picked it up last year with very little knowledge on bikes as this is my first and the previous owner didn't know much about it.

it doesnt run very good at low speed/rpm splutters and seems to have delay in getting the power to the bike, I've put new plugs on it, new air filter, new fuel filter, cleaned the carbs out but looked like someone had already done them as very clean. Balanced the carbs up which help a bit but not a great deal.

Has anyone had this problem or can give me an idea what I should try next?

Thanks

 

Have you checked the fuel pump?

 

I had a similar problem that turned out to be loose clamps between the airbox and carb. I'd also check that you re-connected all the hoses in/around the airbox and make sure the clamps between the carbs and the engine are seated and tight.

-morgan

 

No havent checked that, but the bike runs so wouldn't that say the fuel pump is working?

 

1999 cbr 600f4 splutters only when it gets roughly to 80 mph , it stops spluttering after that and goes well , goes very well and lots of power up to that 80 mph any ideas i, i have new plugs , cleaned air filter out new oil and filter, plus fuel filter

 

try replacing your ignition coil caps. that worked for me. just got it fixed a few days ago. And it's an absolute delight to drive in the city now. hope it helps 1
https://www.motoelectrical.co.uk/typ...SABEgKZJPD_BwE

link above