Topic: Fuel Screw help

[Deltarider]

Carbs are balance but now I get white smoke out of the pipe.

Will ride it around the block wee what happens. Need info on how to set idle screw, mixture, and air screw.

Commenting the video: sync looks fine, although I used to have the dampeners a tiny bit more open to give the indicators a little bit more of 'moving room'. Have you monitored what the gauges show when you snap the throttle open quickly? Do the indicators return more or less simultaneously?
White smoke could be condens, caused by too short cycles of operation in which the engine has not really warmed up.
Is the crankcase breather tube's end in the standard position?
I now see, there isn't a tube. Any chance that your pods suck in vapour exiting the breather's cover. I don't think so, but check. I would fit a tube. These fumes are not good for your health whilst riding.

[foomcb5f]

The idle gremlin was loose mixture screw.

Not sure if it will solve the wet foot bowl.

The screws you point at with the screwdriver in the vid are NOT mixture screws, but the screws to sync. They raise/lower the slide. The air screws are the brass screws in the side of the carbs.

Thank you

[foomcb5f]

Carbs are balance but now I get white smoke out of the pipe.

Will ride it around the block wee what happens. Need info on how to set idle screw, mixture, and air screw.

Commenting the video: sync looks fine, although I used to have the dampeners a tiny bit more open to give the indicators a little bit more of 'moving room'. Have you monitored what the gauges show when you snap the throttle open quickly? Do the indicators return more or less simultaneously?
White smoke could be condens, caused by too short cycles of operation in which the engine has not really warmed up.
Is the crankcase breather tube's end in the standard position?
I now see, there isn't a tube. Any chance that your pods suck in vapour exiting the breather's cover. I don't think so, but check. I would fit a tube. These fumes are not good for your health whilst riding.

White smoke seem to clear up after a quick ride. Probably from me messing with the mixture screw and carb balancing.

However there is a dirty spark plug #2 with looks like oil.

The the indicators snap back more simultaneously.

I attached a photo of what I think you mean by crank case breather tube. It is missing a tube as you mentioned. I will run a tube as suggested, thank you

[foomcb5f]

Dirty spark plugs, I swapped them out with new ones.

[Deltarider]

I attached a photo of what I think you mean by crank case breather tube. It is missing a tube as you mentioned. I will run a tube as suggested, thank you

Yep, that's the one. Have the tube routed as shown on p. 170 (Fig. K2-1) of the Honda Shop Manual CB500 - CB550: https://www.classiccycles.org/media//DIR_1653304/DIR_1653404/DIR_1653507/ecc6759db0a214d5ffff8825ffffe41e.pdf
Good the smoke disappeared.
I can't comment on the plugs. Bike has done a lot of idling recently and any CB500 will then have them black in no time. Do a ride and try to run @ 5000 rpm minimum for some time and then have a look at them. Compliments: engine seems to run nicely. Where did you hide the battery?

[foomcb5f]

I attached a photo of what I think you mean by crank case breather tube. It is missing a tube as you mentioned. I will run a tube as suggested, thank you

Yep, that's the one. Have the tube routed as shown on p. 170 (Fig. K2-1) of the Honda Shop Manual CB500 - CB550.  https://www.classiccycles.org/media//DIR_1653304/DIR_1653404/DIR_1653507/ecc6759db0a214d5ffff8825ffffe41e.pdf
Good the smoke disappeared.
I can't comment on the plugs. Bike has done a lot of idling recently and any CB500 will then have them black. Do a ride and try to run @ 5000 rpm minimum for some time and then have a look at them. Compliments. Engine seems to run nicely.

Will do, true bike has been idling like crap for 2 weeks.

Bike runs smooth and the sound is more in sync. Throttle up and off come down nicely. Now I know what it should sound like.
 
Thanks for your patience and help. Very nice pdf manual quality. 

Send me a PayPal or Venmo, I would like to buy you a drink sir!

[Deltarider]

  Thanks, but don't bother. Are you aware you can find the Shop Manual here: http://manuals.sohc4.net/cb500/
Where did yu hide the battery?

[foomcb5f]

The box is right under the seat.

I have been diagnosing faulty charging RR, unbalanced carbs, brakes, etc. I wasn’t prepared to purchase a vintage Honda, saw it for sale and bought it the next day. So this is all new to me.

I wasn’t aware of the online manual link you posted. I downloaded a couple from classsiccycles.org. Poorly scanned, but it was free. Thank you for the link.

[Deltarider]

Haha, could never have guessed the battery was in there. In case you're interested: the Parts Lists are also there. You just need to know the engine- and framenumber of yours, because there have been some modifications here and there. And here is a scan of the Owner's Manual: http://www.honda4fun.com/materiale-documentazione-tecnica/libretti-uso-a-manutenzione The blue one (K1) is best for you.

[caluser2000]

Good to se are progressing in the right direction. once sorted the bik ewill be a bit of fun to ride. I always come back with a smile after a decent ride of 100kms or more. I also sleep quite well that night. A good thing for an insomniac..

[foomcb5f]

Delta rider thanks again, good to get a few things sorted before the weekend. My Bell riot helmet just came in and the Bell 500 w bubble screen should be here next week. Just came back from the gold course and it perform beautifully.

Caluser2000 the bike get looks and the exhaust note is distinct to the Cb500f. I have own 1000cc and 750cc but this 500 is perfect for around town riding. It too puts a smile on my face after every ride. The maintenance reminds me of my horse lol, train more than ride, but well worth it every time you saddle in. Thanks for you help.

Will tackle the wet bowl and oil leaks next week.

Have a good weekend.

[Deltarider]

Good looking bike and that red dot on its tank is certainly a nice touch. Times have changed: I remember the days when driving around a Japanese car in some parts of the US, was enough to be constantly honked at by 'patriots'.
I forgot to comment the leaking of your #4 carb. If it's the bottom opening of the brass tube that pisses, here is more or less this standard procedure:
a) Sometimes it cures itself. Having said that, it should have happened by now in your case.
b) So, if it doesn't, perform what is described in: http://forums.sohc4.net/index.php/topic,182692.msg2114622.html#msg2114622
c) If that doesn't help, you have to remove the floatbowl for further inspection. There is some comfort in knowing that, as far as the CB500, the #4 bowl happens to be the easiest to remove with the carbs in situ.
If that little pipe is cracked, others may chime in. They have experience with fixing that. I do not.

[foomcb5f]

Look what we have here. A broken and pinched o-ring, also one of my screw has lost its thread.

Dirty bowl, and some dried up sealant that was spread on uneven.

Floats are moving freely, and o ring are stopping fuel as designed.

[foomcb5f]

Ordering new o rings atm, in the mean time let’s make a gasket.

Back from 15 minute ride, “look ma no leaks”.

[Deltarider]

Aahh, it was the float bowl gasket. Happens many times they become damaged. Float bowls on later models CB500/550 had four little 'helpers' to keep the gasket in place (see pic below).

... and o ring are stopping fuel as designed.

I'm afraid I don't quite understand what you mean by this ^.
The original crossheads require a JIS screwdriver. I have replaced all 16 by allen. 

[foomcb5f]

What I meant by “o ring” was referring to the float needle o ring, as the float went up there was no dripping/leaking of fuel coming into the bowl.

Good call on the JIS screws, I had to modify a stubby screw driver to remove them while on the bike. Will definitely get Allen screws for ease of access.

Next is the leaking upper and lower head gaskets.

[Deltarider]

Will definitely get Allen screws for ease of access.

If you choose stainless, like I did, in theory a little electrolysis is to be expected, but... so far I have not noticed any worrysome development. Not in over 30 years...
About the head gasket. Before the CB500 was launched, you can trust Honda has done a lot of testing. What Honda couldn't well foresee that in practice, bikes would hibernate for months or otherwise be inactive for long periods of time. It's my gut feeling that exactly that is at the root of the notorious sweating or even leaking of oil, that all CB500s and Cb550s will - sooner or later - fall victim of. It's not so much the headgasket, as well the seals in the oil passages. When I bought my bike in 1980, it sweated oil and... it still does today. In the past, two experienced mecs have promised that after their interference, there would be no more leaking. Alas! So, I've learned to live with it and as long as it doesn't dirty my pants, I see no reason to take action. Once a year I clean the engine with a biodegradable degreaser and water and at every tankstop I clean a bit with a paper towel. It's done in a ten seconds, so for me it is no big problem. It is however for those that want an immaculate jewel like looking engine and polish crankcase- and clutchcovers to a degree in shine, that I have never witnessed when the bikes stood new in the showroom.