MOPED ARMY

The smaller the carb the quicker the response thus instantaneous torque down low...anyways you can put a 14 on there and read the reviews off treats sounds like stock head works, might wanna mess with squish.

closing the thread. someone on another forum gave me this answer, which is similar to one i found here, but more detailed. very helpful. "...so in carburetors there’s big key called velocity and when you go bigger in carb size you lose velocity unless carb is of appropriate size. Bigger carb is better for reaching higher Rpms being stock carb is limiting factor. Considering high torque cylinder is low rev it’s better setup with small carb better velocity and considering high torque makes power down low rpms it better suits a curcuit which is low rpm torque pipe"

Ya it made more power and speed with a 14mm bing so they just kept the 14 mm intake and put a smaller 12mm carburetor on it to keep the power down

Ah I mean technically sorta right? But the difference between 12 and 14 mm really isn't going to have any significant negative impact. You will need to swap around some tuning parts possibly.

Most people that fuck up bings swap them around and have mismatch tuning parts, they run like crap, and they say things like putting a 14 on a 12 hurts the midrange when it's really just tuned wrong.

I have a perfectly tuned airsal with a 14 Bing at home, I have been meaning to pull it apart and see what's in it, next chance I get I'll try to remember to write it down for ya.

My setup is:

E50

44mm (65cc) airsal, not case matched or ported

Bing 14

2.17 atomizer

2 ring needle

Second notch from the bottom

51 slide

68 jet

Stock air cleaner derestricted

15deg BTDC timing

Proma GP shortened 3"

16*40 gears

I think I'm going to drop the needle one clip, or maybe go back to a 70 and drop the needle 2 clicks once I advance the timing this spring, it's really close, 99% of Moped riders would say perfect but there is just a tiny little spot where I'm not happy with it, and I know it will pick up a little more speed at 17-19 deg btdc.

Top speed right now is just shy of 45 but it pulls even a biggish hill at 35+ looks stock, nice and quiet, the kind of bike I would let my 65 year old mom ride. I think it will be over 45 and might go back to a 15 front just to help it pop out of the hole a little better and lock the clutch faster.

it's a head that lets you tighten the nuts and studs to 12 foot-pounds instead of 8 so that you don't have as many air leaks

My e50 airsal is single embossed needle clipped third down from top. Not sure if I am getting past 40 as speedo doesnt go past 40 but with the mesh filter and 14x40 gearing it is screaming loud, especially when I lay off the throttle (i am guessing bearings and seals). I can accelerate up big hills. Need to tune clutch to be able to get off the line with 16x40 and expect better top end but 40 is more than fine really. I like the sound of the mesh filter but I like what you did with the stock airbox. I would like to quiet my bike down a bit and not lose anything. how did you decide on the 2.17 for the 14 as opposed to the 2.22? Is there any difference between a 1/14/152 and 1/14/160 other than when they were made?