Motorcycle Repair: How to Un-flood CBR 600?, honda cbr 600, honda cbr 600 f4


Question
Hi Wayne,

I am pretty sure my 1999 Honda CBR 600 F4 is flooded.
How would you recommend I Un-Flood it?

I've heard various methods of pulling the plugs and turning it over, or pulling the plugs and setting fire to the excess fuel in the cylinder.

I'm not sure with method to choose and would appreciate your advice.

Thanks,
Jesse from Canada too :-)

Answer
Jesse,

Note:
Optional:take the plugs out and use the starter to
clear out the gas. Watch that the plug
wires are not close to any gas that is ejected.
If you have alot of gas the syringe trick
would be okay. Make sure your gas tap
is not set on "prime" if it has that setting.
Gas flows freely on "prime."
If the tank has pressure in it, the tank
vent is plugged or cap vent.
If it won't stop flooding, your carb
needle valves are dirty, stuck open or worn.
You have to clean the carbs to fix it and
possibly buy new parts as needed.
Make sure the plugs are dry and clean when
you try to restart it and maybe check for spark
also when the area is clear of gas or fumes.
Charge the battery fully as well.







First thing is turn off the gas, pinch the gas line
or whatever to prevent any more fuel getting in.
You will likely have to clean or replace
the spark plugs next. I don't recommend setting
any fires to anything. That comes from
experience after watching my Honda CB160 burn to
the ground as a lad. Seeing your carbs drip
off your bike makes you think twice about
gas and sparks.
Anyway, you could remove the plugs and turn the
engine until the piston is near the top,
put a rag around the hole and blow
it out with compressed air until dry.
Put dry plugs in and try again.
Make sure your battery is fully charged.
I am nervous about cranking an engine with
the spark wires nearby, especially a flooded
engine. I have seen the gas ignite as it
comes shooting out of the cylinders.
If it starts, you will have to open the fuel
tap again. Is there a reason it is flooding?
Worn carb needles, choke stuck, pressure
in the gas tank?