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A Final Desperate Plea for Help

  • Thread starter Thread starter Uruka
  • Start date Start date
You really beed to have the carbs done by somebody. If you have not removed the pilot jets and cleaned them with a thin wire (maybe .002" of an inch) then you'll never get it running right. You floats are either sticking or full of gas. This can happen. Take them off and shake them. If you hear anything, they are no good. www.pdftown.com probably has the .pdf manual for your bike. You need to know how the carbs work before you can clean them correctly, at least it helps. Carbs are the lungs of your bike. They have asthma or bronchitis right now.
 
Whoa! Steve, you're suggesting 3-6 sizes up for pods (higher end of this range if upgraded header/exhaust as well)? That sounds like more than I had heard, but you may be right. Not to hijack, but I've been playing with pods on my bike and with mains 2 sizes over stock, my colortune was still showing a bit lean when revving high. I haven't been able to check plugs b/c I blew out an oil seal in the middle of fiddling with the carbs.

I'd never run the bike without air filters due to the risk of overheating from running lean (dust is a lesser risk to me than seizing).
 
Allow me to reiterate; I believe the carbs are rich now because the exhaust is smokey. I agree that I should check out the float needles, they're new but they were sitting for a while. I cleaned all of the jets thoroughly with a 24 hour carb dip then I ran a wire through 'em. I have pod filters on now and I increased the main jets from 110 to 115, up two sizes as recommended.

I'll fix this leak and do those plug chops.
 
I built a CB400F with a Yoshima Ontario Motor-tech kit. Hand bent Pipes and custom carbs by Kazio Yoshima (1977). I started at the low end to make sure the bike would roll off the low end smoothly before moving to the top end. I would suggest you do some spark readings at under idle to 3000 RPM's and then do the High End readings to cover all bases. It sounds like your almost there.
 
Same problem.

Same problem.

Do not feel to bad. I have the exact same problem that you do.When I bought mine the PO put 4 into 1 ceramic racing headers on it and pod filters. The carbs look good but they also leak into the filters. Well 2 of them anyway.So far all that I know is the o ring for the petcock is bad. I am about ready to put it back stock. I rode mine around my house with no filters on it a few times. It did ok till you give it gas, then it just boggs out. The PO said he put smaller jets in it but I am sure that he did not know what he was doing so I have learned alot reading this. If I figure anything out I will surely share it. God bless.
 
Well I can run it around town now, I haven't taken it on the freeway but it putts around the streets nicely. I need to do those plug readings, adjust the valves, and I should probably sync the carbs also. For just a bench syncing though, it runs pretty good.

Here's a video of the bike as of today.

http://www.youtube.com/watch?v=3B3EXJK7-3U
 
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