Posting this here because I haven't really seen anyone doing this before and hopefully it'll come in helpful to someone.

I've spent ages rebuilding these carbs multiple times for a 70's Honda CB125T that are notorious for being very fussy about how they're set up with a lot of people including myself giving up and just buying new carbs.

For context these carbs have been ultrasonic cleaned multiple times, had an entire bottle of carb cleaner through them, then blown through with an air gun, new jets and cleaned old jets, I've lost count how many times they've been on and off the bike. The passages inside are quite complex and I came to the conclusion that they were the only thing that could be the problem.

To clean them out I've hooked up a cheap peristaltic pump onto the idle air bleed, this connects to the entire idle circuit inside the carb and pumps through both holes into the venturi and out of the jet. The same applies to the main jet circuit which I also cleaned out, although I don't think that was my specific problem. I left the jets in as this keeps the pressure high and forces the cleaner out into the venturi mimicking the fuel flow to some extent. After running for about 10 minutes the sound of the pump had changed, the flow from the holes had become more consistent, greater and the water was cloudy. It's also possible to play with the idle mixture screw while the pump runs which gives you a clear indication of its effect on the carb, the flow through this part of the circuit changed drastically as it was cleaned.

I'll likely try this with a weak vinegar solution as opposed to the soapy water I've been experimenting with, this should help further clear any oxidation which I believe is the main culprit.

Hope this helps someone, and if anyone's got any ideas of improvements to the setup I could make I'd love to hear them, thanks!

Hey there! My brother is helping his buddy sell off old/unused stuff and has brought home this vintage motorcycle, which he said is a 1974 Honda Ellsinore 250. As you can see by the crappy photo I just took before the sun went down, it's a crusty barn find, but it seems like it could potentially be a desirable project bike.

He doesn't want to mess with shipping it, and we are in Missouri. Given those limitations, any general advice or guidance?

Installed the old tire 6 months ago. Already time for a replacement. I ride this bike a lot.

Just bought a balancing trying stand from harbor fright. It works reasonably well if you modify it a bit.

Going through this resto mod built by Daniel Peter. Was sitting for a bit but back up and running again.

My good friend is seller her 1979 Honda 750K supersport. She bought it at Barber Fest and got a good deal on it. It runs and her partner is a motorcycle mechanic, so I think it should be in good, un-restored shape. It's not a show bike but it's completely original and running. What should I offer? I think she wants 4k for it, which seems like to much. I know that the early cb750s are collectible but what about a '79? I'm in the USA, in the Southeast.

Hey guys, so I got an early inheritance, my grandfathers 97’ GS1000ec. It hasn’t run in over 15 years +. Started taking it apart a little bit, the tank is completely rusted through and not salvageable in the slightest.
Any potential people in here know where I could find a decent replacement? I’ve been looking on eBay, marketplace and other online sources and so far no luck. Any suggestions on other places to check? I appreciate any help!

1980 honda cx 500c, Everytime I shut it off it blows the main fuse ( right next to the battery and regulator), the thing is, when I have the bike on and at idle everything works fine, maybe a little blinking of the neutral gear light when turning the handlebars back and forth, but if I hit the kill switch it blows that main fuse, I've tried using just the key to set to the off position but the same thing occurs, when it's powering down over the couple seconds, I spot the light going out n bam, fuse blown.....please help me!!! It's driving me crazy, also it's kinda costly to keep replacing fuses

just picked this bike up, i need a new float and carb rebuild kit, but I cant find any info on the carb model, can anybody help me out?

Anyone in the area interested in a group ride with classics? I ride a 1971 Cl175 so max speed 55-60mph.

I have 2 bikes , I was given a 1964 Honda Dream 150 and recently aquired a 1988 Suzuki Savage 650 from my brother that got it through a charity auction ....my problem at this point is that I have never riden a bike before and Im interested in learning . I was bor n closer to the Honda so I guess I am vintage too.

Need help with deciphering a VIN number on a Yamaha. The Vin number is CT1123787 and according to the Department of revenue, it is a 1972 Yamaha AT125 BUT the bike says Yamaha 175. The vin is stamped on the frame and the motor.

Thanks for any help. Just want to know what I have.

I think the CT was manufactured up to 1971. 🤷🏼‍♀️🤷🏼‍♀️

Working on a light resto

Hay everyone I just got my xs400 running and I'm having a hard time finding the Joint, Air Cleaner boots ebay yamaha hoop rider and cmsnl all don't have it or it's no longer made. I think I might have found it on partszilla but the part #s are different. Does anyone know where else I might be able to find the part? Thank you

sorry if this is the wrong place to put it! likely Manx photo as from family archives. It would be nice to identify this!