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  1. 1982 CB250N Superdream Jet sizes???

    Fuel Supply and Carburation
    Hey guys, My superdream is having problems and seems to be running rich. Always has sooty black plugs and i'm wondering if the jet sizes are wrong, but I can't seem to find any information on what stock jet sizes are. I've looked in the OWM and online but no luck. Thanks for helping Cheers Isaac
  2. 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...
  3. Honda Cl350 Velocity stacks Jetting

    Fuel Supply and Carburation
    Hey all, Finished my bike, just trying to get it running smoothly. Starts right up, idles fine, but bogs down when i'm riding and give it gas. I have nice velocity stacks with foam (see link below), and also shorty mufflers, so i know this can be tricky with the old Keihins 3D's. I upped...
  4. 1972 CL350K3 Scrambler Bogging/no power under 3000 RPMS

    Fuel Supply and Carburation
    Hey Friends! I recently purchased a non-running cl350, and after cleaning the carbs and a few other things I got it running. Idles like a champ. I just put throttle cables on it and a clutch (they were missing when I first got it). So yesterday I went for my first test ride and found that it...
  5. New to Jetting: Help Diagnosing VM32 Install [Video]

    Fuel Supply and Carburation
    Hey all- Like the title says, I'm new to jetting carbs. I had gotten decent at tuning up my Keihins but wanted to try and see how the bike would run with Mikunis installed. I started with: 185 Main 35 Pilot 6DH7 Jet Needle 2.0 Air Jet 159 P-5 Needle Jet With that set up I am able to hold an...
  6. CB400T Hawk air leak/ carb/ exhuast proplem

    Engine Discussion
    Hey everyone my name is AR I am new to this form. I have built 2 Yamaha DTs into little café racer then I am currently working on two Honda motorcycles 74 CL125 and a 81 CB400T Hawk. I need some help with finding out what I can do to fix my bobber CB400 Hawk. Anything that anyone could recommend...
  7. Poor performance at high speed CB400/450

    Fuel Supply and Carburation
    Hey guys, I just recently got my 1978 CB400 on the road. I'm having issues with power at highway speeds. I have trouble accelerating past 100 kph, and have only gotten it to about 120. The bike seems to bog on WOT regardless of speed, but if I hold it open at highway speeds, it bogs down. It has...
  8. Mikuni VM30 special jetting

    Fuel Supply and Carburation
    Hi guys, my project is a ’69 CL350, and I’m looking for some feedback on where to start with Jetting. The cylinder is currently at the machinist being bored to fit my new 1.5mm (65.5mm) oversized pistons from Boretech. He also has my head and is doing a full-on valve and head job, including...
  9. 1971 CB175 Sputtering & Bucking at full throttle

    Fuel Supply and Carburation
    This should be simple but.......My Cb175 was not running when I bought it so I don't know anything about it's history. That being said, the compression is even on both cylinders, the bike starts/idles fine and pulls well up to about half throttle or so. At WOT though, it spits and chokes at all...
  10. 1982 CB450SC idle at 2500+ rpm

    Fuel Supply and Carburation
    [This is my first post, I hope i'm not giving too much info... I think most of it is necessary for diagnosis. Thanks for reading!] Going on my 3rd season with this bike. I bought it with 17,500 miles on it; I did almost nothing to it the first season. Before 2nd season I did carb cleaning...
  11. Using UNI or KnN air filters

    Fuel Supply and Carburation
    Hi all, new to the forum and Honda twins all together. Just got my first CL 350 twin, looking to make it a brat style ride. My question is, I want to ditch the stock air filters and use either UNI or KnN but does anyone have a main and secondary jet recommendation for using either of those...
  12. What size jets for straight pipes

    Fuel Supply and Carburation
    Hello everyone. Im sorry if this question has been answered already but I have been searching for a while and have not found a definite answer. I have a 1971 Cb175. I am installing straight pipes soon and would like to know what size jets i will have to run and what else i will have to do to...
  13. jetting info for 81 cm 400t (i know, but im new to all this)

    Fuel Supply and Carburation
    Just wondering, in order to put pod filters on the bike, I understand there's more air, thus I need more fuel, so where can I find the appropriate sized jets to accommodate for the influx in air? Any info is much appreciated. Thanks!
  14. Cb175k6 needs your wisdom

    Fuel Supply and Carburation
    So here's where Im at. 1972 cb175 k6 up and running but rough. I have synced the carbs but in trying to tune I have found the mixture screws don't really make any difference in the idle. Had done the timing, points are new and open dead on the F mark. Valve checked and adjusted to manuals specs...
  15. 1975 Honda CB360 Engine Revving Very High Right After Starting

    Fuel Supply and Carburation
    Hello All, I am putting the finishing touches on my CB360 build, and I started it again for the first time last night. I kicked it over a few times and it fired right up, however, the engine raced up to a high RPM immediately and I had to kill the engine before it over-revved. The motor is...
  16. 81 cm400 project.....carbs/jetting/exhaust

    Fuel Supply and Carburation
    Hey folks.....attaching some pics of my project. Looking good so far but still a lot of work to go. I have rebuild kits coming for the carbs, new throttle and choke cable, have UNI pod filters. I'm trying to decide what route to go with the exhaust. Trying to keep this build on the cheap so...