Bing Jets

Bing jets are in Bing and some Encarwi carburetors.

3.5 mm thread (M3.5-0.60) Bing jets are on Puch-Bing, Solo-Bing, Kreidler-Bing, and Encarwi.

4.0 mm thread (M4.0-0.70) Bing jets are on Sachs-Bing, late 80’s AD-Bing and 90’s Korado-Bing.

Myrons Mopeds Bing Jet Sizes Chart

These jets are on other 1970’s – 80’s small engines with Bing carburetors. 

The Bing 3.5 main jets are also idle jets on some bigger Keihin carbs.

The Bing 4.0 main jets are also idle jets on some bigger Dellorto carbs

Original Bing jets are numbered wrong, in a sense. The jet number is not the millimeter size. An original Bing 54 is actually 0.51 mm, not 0.54. This was discovered this in the early 2000’s when aftermarket Bing jets came out. 200 jets were carefully measured with precise wire guages, and then plotted on the graph at right. The original jets (and the first A&R generics) form one line. All other generic jets form a different line.

Generic Bing jets are numbered correctly. The size they say is the millimeters they are. So a generic Bing 54 is actually 0.54 mm.

 

 

 

 

 

 

 

 

 

 


           Bing Jets (3.5 mm) 

 part #   maker   jet#  close to    measured size      price     applications

78drill   custom #00 =Bing48 0.016″ = #78 drill —————————————————————
3.5×44
  custom #00 =Bing46 0.0173″=0.440mm  $15.0  soldered, 78-drilled, then filed with .017 guitar string
Bing46  original #46 =Bing46
0.0175″=0.445mm  $18.0  76-83 Tomos early A3 models (30, 25, and 20mph)
3.5×45  custom #00 =Bing47 0.0177″=0.450mm  -N/A–
77drill   custom #00 =Bing48 0.018″ = #77 drill —————————————————————
3.5×46  custom #00 =Bing48 0.0181″=0.460mm  -N/A–
Bing48  original #48 =Bing48 0.0182″=0.462mm  $15.0  78-80 Puch (2-spd hi torque Ø12 carb 20mph)
3.5×47  custom #00 =Bing49 0.0185″=0.470mm  -N/A–
Bing50  original #50 =Bing50 0.0188″=0.478mm    none  76-78 Batavus (Laura M48 Ø8 carb 20mph)
3.5×48  generic #48 =Bing51 0.0190″=0.480mm  $4.00
3.5×49  custom #00 =Bing52 0.0190″=0.490mm  -N/A–

Bing52  original #52 =Bing52 0.0194″=0.493mm  $5.00  76-78 Batavus (Laura M48 Ø8 carb 25 mph)
3.5×50  generic #50 =Bing53 0.0195″=0.500mm  $4.00
76drill   custom #00 =Bing48 0.020″ = #76 drill —————————————————————

Bing54  original #54 =Bing54 0.0200″=0.508mm  $5.00  74-83 Puch (1-spd alum. cylinder, Ø12 carb 2.22, 20mph)
3.5×51  generic #51 =Bing54 0.0201″=0.510mm 

3.5×52  generic #52 =Bing55 0.0204″=0.520mm  $4.00
Bing56  original #56 =Bing56 0.0206″=0.523mm  $7.00  77-80 Batavus M48 and M56 (30), 80-83 Trac M56 models
3.5×53  generic #53 =Bing56 0.0209″=0.531mm  
75drill   custom #00 =Bing48 0.021″ = #75 drill —————————————————————
3.5×54  generic #54 =Bing57 0.0212″=0.540mm  $4.00
Bing58  original #58 =Bing58 0.0213″=0.541mm  $7.00  78-83 Puch (2-spd hi torque cyl. Ø12 carb 2.22 30mph)
3.5×55  generic #55 =Bing59 0.0217″=0.551mm  $4.00
3.5×56  generic #56 =Bing60 0.0220″=0.561mm  $4.00
Bing60  original #60 =Bing60 0.0222″=0.564mm  $7.00  78-83 Puch (1-spd hi torque cyl. Ø12 carb 2.22 30mph)
3.5×57  generic #57 =Bing61 0.0224″=0.571mm  $4.00
75drill   custom #00 =Bing48 0.0225″=#74 drill —————————————————————
3.5×58  generic #58 =Bing62 0.0228″=0.580mm  $4.00
Bing62  original #62 =Bing62 0.0229″=0.582mm  $7.00
3.5×59  generic #59 =Bing63 0.0232″=0.591mm  $4.00

Bing64  original #64 =Bing64 0.0234″=0.594mm  $6.00  74-83 Puch (1-spd al cyl Ø14 carb 2.22 needle jet 30mph)
3.5×60  generic #60 =Bing64 0.0235″=0.600mm  $4.00
Bing66  original #66 =Bing66 0.0239″=0.607mm    none
75drill   custom #00 =Bing48 0.024″ = #73 drill
—————————————————————
3.5×61  generic #61 =Bing65 0.0240″=0.610mm  $4.00

3.5×62  generic #62 =Bing66 0.0244″=0.620mm  $4.00
Bing68  original #68 =Bing68 0.0248″=0.630mm  $7.00  78 Sears (1s al cyl Ø14 carb 30mph), Kreidler (30mph)
3.5×63  generic #63 =Bing68 0.0248″=0.630mm  $4.00
75drill   custom #00 =Bing48 0.025″ = #72 drill
—————————————————————
3.5×64  generic #64 =Bing69 0.0252″=0.640mm  $4.00

Bing70  original #70 =Bing70 0.0254″=0.645mm    N/A   84-86 Puch Cobra (Ø14 carb, 2.17 needle jet 25mph)
3.5×65  generic #65 =Bing71 0.0256″=0.650mm  $4.00
75drill   custom #00 =Bing48 0.026″ = #71 drill
—————————————————————
3.5×66  generic #66 =Bing72 0.0260″=0.660mm  $4.00

Bing72  original #72 =Bing72 0.0260″=0.660mm    N/A   84-86 Puchs had bigger main jets, but smaller needle jets.
3.5×67  generic #67 =Bing73 0.0264″=0.670mm  $4.00

Bing74  original #74 =Bing74 0.0267″=0.678mm    N/A   1990’s Puch remakes also had 70’s jets, 2.17 needle jets.
3.5×68  generic #68 =Bing74 0.0268″=0.681mm  $4.00
3.5×69  generic #69 =Bing75 0.0272″=0.690mm  $4.00

Bing76  original #76 =Bing76 0.0273″=0.693mm  $6.00
3.5×70  generic #70 =Bing77 0.0278″=0.705mm  $4.00
75drill   custom #00 =Bing48 0.028″ = #70 drill
—————————————————————
3.5×71  generic #71 =Bing78 0.0280″=0.715mm  -N/A--

Bing78  original #78 =Bing78 0.0280″=0.711mm    N/A
3.5×72  generic #72 =Bing79 0.0283″=0.725mm  $4.00

Bing80  original #80 =Bing80 0.0287″=0.729mm    N/A
3.5×73  generic #73 =Bing81 0.0287″=0.735mm    none
3.5×74  generic #74 =Bing82 0.0291″=0.745mm  $4.00

75drill   custom #00 =Bing48 0.0292″ = #69 drill —————————————————————
Bing82  original #82 =Bing82 0.0292″=0.742mm  $7.00 2000’s Bing Ø15 carb with smaller 2.17 needle jet
3.5×75  generic #75 =Bing83 0.0296″=0.755mm    none
Bing84  original #84 =Bing84 0.0300″=0.762mm    none 1978-79 Puch Magnum X

 


cleaning a #25 jet

       Bing Jets (4.0 mm) 

At right, the smallest of the small. The #25 pilot jet is bigger than wire wheel wires, but smaller than wire brush wires in the background. It’s three hairs wide!

part number  maker  jet#  close to    measured size      price     applications

Tomos243222 Dell.  #25 =Bing27 0.0107″=0.272mm     $8  Tomos A55 pilot (idle) jet
Tomos243110 Dell.  #29 =Bing31 0.0124″=0.314mm     $8   same as Tomos #25 idle jet “cleaned” with #80 drill
D1486-030 Dellorto #30 =Bing33 0.0128″=0.325mm     $8  good for A55 pilot jet, mix screw 1 turn more out
77drill   custom #00 =Bing48 0.0135″ = #80 drill —————————————————————

D1486-032 Dellorto #32 =Bing35 0.014″ = 0.355mm     $8  same as drilled with #80 drill, sub for A55 pilot jet
77drill   custom #00 =Bing48 0.0145″ = #79 drill —————————————————————

D1486-035 Dellorto #35 =Bing39 0.0149″=0.378mm    N/A
77drill   custom #00 =Bing48 0.016″ = #78 drill —————————————————————

D1486-040 Dellorto #40 =Bing45 0.0170″=0.431mm     $8
4mBing45 Bing orig #45 =Bing45 0.0171″=0.434mm    N/A   Sachs 504/1A DK (19mph)
77drill   custom #00 =Bing48 0.018″ = #77 drill —————————————————————
4mBing48 Bing orig #48 =Bing48 0.018″ = 0.46mm      $8
D1486-043 Dellorto #43 =Bing49 0.0182″=0.462mm    N/A
4mBing50 Bing orig #50 =Bing50 0.0183″=0.465mm     $8  Sachs 504/1B and 505/1B (Ø10 carb 20mph)
D1486-044 Dellorto #44 =Bing51 0.0187″=0.475mm    N/A
4.0×48 000 generic #48 =Bing51 0.0189″=0.480mm
D1486-045 Dellorto #45 =Bing51 0.0190″=0.483mm     $8
4mBing52 Bing orig #52 =Bing52 0.0194″=0.493mm    N/A   Sachs 504/1A and 505/1A (Ø12 carb 30mph)
D1486-046 Dellorto #46 =Bing52 0.0194″=0.493mm    N/A
4.0×50 000 generic #50 =Bing53 0.0197″=0.500mm
76drill   custom #00 =Bing48 0.020″ = #76 drill —————————————————————

4mBing54 Bing orig #54 =Bing54 0.0200″=0.508mm    N/A  ’84-86 Puch Austro Daimler (30mph)

D1486-047 Dellorto #47 =Bing54 0.0198″=0.503mm    N/A
D1486-048 Dellorto #48 =Bing55 0.0202″=0.513mm     $8  Sachs 504/1A and 505/1A (without air filter box)
4.0×52 000 generic #52 =Bing56 0.0205″=0.520mm
4mBing56 Bing orig #56 =Bing56 0.0206″=0.523mm    N/A  ‘

D1486-049 Dellorto #49 =Bing56 0.0207″=0.526mm    N/A
75drill   custom #00 =Bing48 0.021″ = #75 drill —————————————————————

D1486-050 Dellorto #50 =Bing57 0.0210″=0.533mm    N/A
4.0×54 000 generic #54 =Bing58 0.0212″=0.540mm
4mBing58 Bing orig #58 =Bing58 0.0213″=0.541mm     $8 Sachs 504/1D and 505/1D (Ø12 D-carb 30mph)
D1486-051 Dellorto #51 =Bing59 0.0215″=0.546mm    N/A
4.0×56 000 generic #56 =Bing51 0.0220″=0.560mm
75drill   custom #00 =Bing48 0.0225″=#74 drill —————————————————————

D1486-055 Dellorto #55 =Bing63 0.0230″=0.580mm     $8
4.0×58 000 generic #58 =Bing63 0.0230″=0.580mm
4.0×60 000 generic #60 =Bing65 0.0236″=0.600mm
75drill   custom #00 =Bing48 0.024″ = #73 drill —————————————————————

4.0×62 000 generic #62 =Bing68 0.0244″=0.620mm

D1486-060 Dellorto #60 =Bing69 0.0250″=0.635mm     $8