Topic: sootandstuff

[haill]

what is the running condition of a CB500 motor that is found not to have the  o ring gaskets in the air flow adjustment screws of a 627b carb.
float height when setting can it be done by simply bringing the float down with ones hand into contact with the valve and measuring when contact is made?
regards Keith.

[1timduke]

If I'm reading it correctly...look inside the airscrew orifice with a tiny hooked pick, the o-ring may be lurking inside.

If the carbs are on the bike, verify that the float valve is not affected by gravity (i.e. dropping out) then move the float with your hand until it just touches the needle of the valve.   Then measure from the float to the carb body, should be whatever the manual specs are, if not, bend the little tab on the float arm until it's correct.

Hope it helps.

-Tim

[haill]

notice last night after running that the float on number three holds gas then decides all by itself to take a leak and full on.
filled up my tank two nights before when checking carb sync.  notice last night that needed reserve to retest. this made be look around but  everything was dry.
then later not touching anything heard trickling on the ground and there was gas running straight out heavy through number three's overflow.
Hopefully this might be the issue that is troubling me with the soot filled plugs. All of them mind you.
The carbs where completely disassemble off the rack boiled and cleaned all jets emulsifier tubes and float heights set etc.
Not sure what causes this condition of leaking sometimes. sticking valve and seat?
cheers Keith

[1timduke]

Sticking float pin (pull pin and polish), pinhole in float (take out float an immerse in water, look for bubbles), busted needle valve (replace), float could be upside down (flip it over).   

Sooty plugs on all cylinders?   Is the choke functioning properly?   Are there any other modifications to the bikes airbox or exhaust?   If there are mods, then standard jets may need to be changed to compensate.

-Tim

[TwoTired]

what is the running condition of a CB500 motor that is found not to have the  o ring gaskets in the air flow adjustment screws of a 627b carb.

There is no oring for the air screws on a 627b carb, just the spring.

[haill]

ordered 4 full Keyster kits today. Had a good look at all the original jets.  Were corroded in places the main jet the most.  o'rings dried & cracked  so thought it best to go for the full set.
pulled the carbs tonight to look through everything again the float bowl drains where not clogged. the o'rings were dry and split apart upon removing to inspect. the idea of the o'rings leaking around the float valve raising the fuel level regardless of float height is where I'm going too.
On good news got the title placed in my name today. met the owner who sold it 15 years ago at the DMV. No one had registered the bike after she had sold it back in 1995.  She came down and signed off on it. She'd like to go for a ride after it's done/running for compensation.
Nice Lady...

[TwoTired]

You may have no choice since the acid bath took it's toll on internal parts.  But, there have been threads where the aftermarket needles and emulsion tubes caused erratic throttle behavior, and the Honda original components fixed those problems.
Examine those parts carefully and use the originals if they haven't been damaged.

Good call on the orings.

[haill]

the jets & needles etc didn't take the bath in the acid. just the main carb body.
the lemon juice solution was the juice of one lemon lots of brake fluid and the remainder water. the jets & needles only saw some carb cleaner. the o'rings once inspected more closely were dried and fitted loosly to the carb body especially in the main float jet area. Which is good in this case... 
the emulsifier tubes and needles were taken out and cleaned when the carbs were separated. the emulsifier tubes  were clogged/caked  but cleaned up nicely. the needles looked good. So rather than separating the carb bodies again was going to  change out only the internals of the float bowls and see if this cures the sooty plug  problem first.
thanks for all your help up to this point.  will get back with the results early next week and post a pic of the finished product. regards.