Hi everyone!
My CBR 600FY (year 2000) yesterday slowly stopped and wont start again! I check fuel line witch is ok, relay and fuel pump ok and gas coming to carburetors. I tested plugs, I have spark with yellow – blue colors (between electrodes) and when try to start I have detonation from exhaust?? Also, I noticed that’s plugs electrode wearied and very wet from fuel. I going to replace plugs tomorrow and try again. I don’t know what is going on. Gas is 100 octane fuel, average quality.
I appreciate any help.
P.S. sorry for my bad English.

 

Shear curiosity here but why in the world are you running 100 octane? AND, where do you even find 100 octane?

 

because I was short with fuel and gas station with only 100 octane fuel was near

 

i had the same issue with my bike.

It sat over the winter...and when i tried to fire her up..it wont start and gave a loud detonation in the exhaust.

i bought my bike last season used so i dont know how old the sparkplugs were. I took the bike apart and changed the sparkplugs. You would think it would start right up..but no go. It was cranking but wouldnt kick over.

I checked to see if gas was going into the carbs..took some starter fluid, shot it into each of the carbs with the throttle pulled back.

had the choke a lil past halfway, throttle opened, cranked it..and she roared from hibernation.

takes a lil persistence. good luck with it!

 

Was it idling and it stopped or were you riding it?

 

* It was on idling, trottle RPM slowly going down until turned off...

thanks guys, any help is welcome

 

leave the choke on longer?
if it slowly dies out with the choke on, check the sparkplugs to see if they are wet from gas or you may have to take out the carbs to see if theres anything like the jets clogged up inside

 

Today I replace plugs, and everything back to normal & it’s working fine. Seems to be plugs problem. Thanks a lot everybody.