What’s up with these carbs???

[3 Wheel Drive]

I started tinkering on this 1981 CB400T Hawk to get it running, replaced the battery, ignition switch, cdi, and starting solenoid, etc... Now all the lights, horn, starter all work but it still won’t start.

After pulling the carb I notice someone used JB Weld on 2 different locations. I am not a real mechanic by any means but I started working on mini bikes last summer and want to learn more.

Why would anyone do that to a set of carbs? Are these still usable? Should I buy new ones and forget these?

I found another similar set of carbs from a 1980 CB400, they look similar to mine:

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F12 2704769705

24746424746524746624746724746824746924747024747124 7472

Theres a a bike shop nearby that does ultrasonic cleaning, I wanted to see if these are even still good to rebuild or not first.

[3 Wheel Drive]

I just googled my bike specs: http://www.motorcyclespecs.co.za/model/Honda/honda_cb400t%2081.htm

The carbs are 30mm Keihin carbs with accelerator pumps. Would a larger set of carbs help with any type of performance gains? I think the Euro version of this bike had different carbs.

[HairyJR]

The JB weld has no effect on carb run function, it's the cross tie tube to supply gas to both carbs, single source petcock connection. Does it have spark? If you spray starter fluid does it try to start? Very clean looking bike.

"HJ" 247473 :beer

[3 Wheel Drive]

Yes it has spark and will run when sprayed with carb cleaner. I tried turning on the fuel to run the bike but that was before I ordered all the new parts mentioned above.

[AMK]

Replace the JB Weld with proper O-rings. The PO was just too lazy to pull the carbs and fix it right.

[Rob Canadian]

I would work with what you have. Give it a good clean.

Check for fuel flow to the carb. After that should be good to go. :)