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  1. Right side running rich and left side running lean

    Fuel Supply and Carburation
    While I was cleaning up and tuning up my bike and getting ready to put on some new clutch plates this week i took out my spark plugs and noticed that my right plug was completely black ( meaning it was running rich). But when I checked my left plug, it was almost white, it had not black "soot"...
  2. '73 CB200 Left Cylinder Running Rich and Firing Mega Poorly

    Fuel Supply and Carburation
    Howdy Honda Twins Forums, I’ve been banging my head on this problem for days now, and would really like some advice from those more experienced: I’m working on my 1973 Honda CB200. Currently, the right cylinder is firing like a dream (so far as I can tell with my hand over the pipe)...
  3. Bike doesn't run above 6,000 RPM

    Fuel Supply and Carburation
    Hi all; first post here, been reading for a while. Unfortunately, all the reading in the world has left me stumped on this one. I bought a non-running CB450K3. Previous owner had begun the process to cafe it out, got frustrated and quit. I bought it with stock pipes (very rusty) and pod...
  4. Bog and pops

    Fuel Supply and Carburation
    Hey All, Facts: - 1980 cm400t - keihin carbs - stock jets - MAC 2in1 plug n play - stock airbox - carb rebuild last year - fuel delivery unrestricted - gas is good with some seafoam - no noticeable exhaust leaks Valve clearance correct. Timing correct. Cable free play correct. Mixture screws...
  5. 1975 CB200T Carbs Running Rich

    Fuel Supply and Carburation
    I have a 1975 CB200T that I recently purchased. I was having a hard time getting the bike started, so I replaced the sparkplugs, sparkplug caps, and wires. Bike started right up and ran great for a couple of rides. I went out to start it up a couple of days later and no spark. I took the plugs I...
  6. cb450 nighthawk runs rich

    Engine Discussion
    I have an 85 cb450 nighthawk that runs to rich. I have gone through the carbs and cant find the problem. The jets are stock, floats are not adjustable and measure good, and I replaced the float valve needle. The pilot air mixture screw is set to the leanest setting and still the bike runs rich...
  7. 1972 CB450 Exhaust After-fire, bogs and dies under load

    Fuel Supply and Carburation
    Hi all! First post here, wondering if you could help me out with my first project. I'm by no means a mechanic by trade but have picked up a thing or two during my first (current) build: a 1972 CB450 K5 Supersport. Current situation: the right exhaust has a loud after-fire every so often, and...
  8. 1971 CL 175 main, slow and needle sizes

    Fuel Supply and Carburation
    I have been working on a 1971 CL175 scrambler with off idle hesitation. Purchased this bike for the wife's first bike but the hesitation is stalling the motor on her. The carbs were rebuilt by the previous owner and I'm convinced the wrong jet, needle and slow jet were used, the wrong kit. The...