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Poor Man's Air Restrictors

E

EmmCee

Forum Apprentice
Hey all. Thought I'd share a quick and easy mod I did on my '82 GS650E yesterday.

I run pods and as we all know the BS series carbs, being CV carbs are finicky, at best, with pods. I know one of the members sells an official version of this, but money being tight and I ever being one to tinker thought I'd give this a try. I also have a 3D printer, so I had nozles laying around.

What I did was take some of these 3D printer nozles:

https://a.co/d/07SwnidP

Put them in my drill, threads facing out and spun them up against a diamond file until they were cut down to just a hair over 4.5mm, slightly tapered, then tapped them into my carb like shown in the image below. I used 0.8mm nozles and they seem to have worked beautifully. Ill be experimenting going both up and down a size to see what my bike really likes and I will report back.

20260412_000942.jpg

Once I find that goldilocks size ill be tapping that port on my carb so I can thread them in with a little teflon tape on the threads.

Essentially, a poor man's air corrector.
 
Cool idea. I have a bunch of old mk8 nozzles lying around, but I already bought a set from zed. You could ask him what ID he uses for the BS to try to get a baseline!

Link to his big thread about them

IDK for certain, but I feel like the nozzle shape could really mess with the airflow but I'm excited to hear the results
 
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