Originally Posted by bubbahotep
Oops, I'm wrong. Just looked at a photo and the rear bowl is straight to the main body. My error. I could have sworn I had 2, dreaming I guess
No biggie- this just makes it a bit of a beach to tune the 2'ndary jetting.
There are different 2'ndary plates available, you can modify the existing plate w/a pin vice (tiny twist drill bits w/a holder)- and there are ways (if needed) to convert to a 4150-style so as to have removable jets like the primary side.
In most cases, these 3310's are good carbs out of the box, requiring mainly primary jetting and accelerator pump tuning to bring them in real good.
You can cross the bridge in regards to 2'ndary jetting when (and if) the time comes, IMO.