Vespa Standard Ignition Timing
16 Degrees = T5 125
17 Degrees = V100 Std., 100 Sport
18 Degrees = PK125 ETS, PX Electric Start Modern setting for Unleaded.
19 Degrees = V50S, V90, PK50/80/100/125, PK50XL/100XL
21 Degrees = P125/150X Points Models and some Electronic PX - IT setting
22 Degrees = Super, Sprint etc., VSD1
23 Degrees = P200E All Models ( A setting )
24 Degrees = V90SS Racer, Primavera, Rally Femsatronic
25/6 Degrees = VMA1, 232L2,
28 Degrees = Sportique, 312 L2
Don’t Forget that all timings are + or – 1 Degree -
Please Note: Older recommended Ignition timing setting where for 2 star fuel. Modern unleaded fuels tend to move the timing a little closer to TDC.
Vespa Tuned Ignition Timing
DR 110cc and 135 = 19 to 20 Degrees ( or standard modern setting for unleaded fuels ).
DR 180cc = 20 to 21 Degrees - Standard IT setting, 18 degrees is the standard IT on newer models for unleaded.
Malossi 110 and 135cc = 16 to 18 Degrees
Malossi 166cc = 18 Degrees
Malossi 172 T5 = 13 to 14 Degrees instead of 16 Degrees
Malossi 210cc = 18 Degrees instead of 23 Degrees as used on std. P200E’s
Pinasco 177cc = 20 to 21 Degrees ( IT standard setting ), Cast Iron, Alloy, Two Port and Three Port.
Pinasco T5 162cc Kit = 20 Degrees instead of 16 Degrees
Pinasco Kits 50-100cc = 18 Degrees in stead of 19 Degrees
Polini 207cc = is measured in mm and is 2.3mm
Polini 177cc = is also measured in mm and is 2.0mm
Polini 125/135cc = is 2.0mm
Lambretta Ignition Timing
125 to 200cc Li SX = 23 Degrees ( or standard modern setting for unleaded fuels 19 to 20 degrees ).
125 to 200cc GP = 21 Degrees ( or standard modern setting for unleaded fuels 19 to 20 degrees ).
Lambretta Tuned Ignition Timing
175 to 225cc Li SX = 17 to 19 Degrees.
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Beedspeed Info on Crankshaft Stroke and Con-Rod Data |
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Con-Rod |
Stroke |
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VESPA |
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50 Special, PK 50 |
87mm |
43mm |
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V90/100, Prim, PK80/100/125, ET3 |
97mm |
51mm |
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150 Super, PX125/150 All Models |
105mm |
57mm |
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T5 |
105mm |
52mm |
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Rally 200, P200E All Models |
110mm |
57mm |
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PX125/150 Long Stroke |
105mm |
60mm |
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Rally 200 (Ducati) P200E Long Stroke |
110mm |
60mm |
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LAMBRETTA |
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75 Vega |
85mm |
44mm |
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J100/J125 |
95mm |
48mm |
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Li Series |
107mm |
58mm |
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TV175 |
116mm |
58mm |
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240/250 Conversion |
116mm |
60mm |
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YAMAHA |
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RD 350 |
110mm |
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Lambretta Ignition Timing |
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107mm Rod |
110mm Rod |
116mm Rod |
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58mm Stroke Crank Standard |
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15 Degrees |
1.25mm |
1.25mm |
1.23mm |
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16 Degrees |
1.42mm |
1.41mm |
1.40mm |
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17 Degrees |
1.60mm |
1.59mm |
1.58mm |
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18 Degrees |
1.79mm |
1.79mm |
1.77mm |
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19 Degrees |
2.00mm |
1.99mm |
1.97mm |
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20 Degrees |
2.21mm |
2.20mm |
2.17mm |
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21 Degrees |
2.43mm |
2.42mm |
2.39mm |
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22 Degrees |
2.66mm |
2.65mm |
2.62mm |
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22 Degrees |
2.90mm |
2.89mm |
2.86mm |
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60mm Stroke Crank |
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15 Degrees |
1.30mm |
1.30mm |
1.28mm |
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16 Degrees |
1.48mm |
1.47mm |
1.48mm |
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17 Degrees |
1.67mm |
1.66mm |
1.64mm |
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18 Degrees |
1.87mm |
1.86mm |
1.84mm |
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19 Degrees |
2.08mm |
2.07mm |
2.05mm |
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20 Degrees |
2.30mm |
2.30mm |
2.26mm |
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21 Degrees |
2.53mm |
2.52mm |
2.49mm |
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22 Degrees |
2.78mm |
2.76mm |
2.73mm |
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22 Degrees |
3.03mm |
3.01mm |
2.98mm |
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61mm Stroke Crank |
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15 Degrees |
1.33mm |
1.32mm |
1.31mm |
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16 Degrees |
1.51mm |
1.50mm |
1.49mm |
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17 Degrees |
1.70mm |
1.70mm |
1.68mm |
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18 Degrees |
1.91mm |
1.90mm |
1.88mm |
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19 Degrees |
2.12mm |
2.11mm |
2.09mm |
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20 Degrees |
2.35mm |
2.34mm |
2.31mm |
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21 Degrees |
2.59mm |
2.57mm |
2.54mm |
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22 Degrees |
2.83mm |
2.81mm |
2.79mm |
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22 Degrees |
3.09mm |
3.07mm |
3.04mm |
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62mm Stroke Crank |
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15 Degrees |
1.36mm |
1.35mm |
1.33mm |
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16 Degrees |
1.54mm |
1.53mm |
1.52mm |
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17 Degrees |
1.74mm |
1.73mm |
1.71mm |
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18 Degrees |
1.95mm |
1.94mm |
1.91mm |
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19 Degrees |
2.17mm |
2.15mm |
2.13mm |
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20 Degrees |
2.40mm |
2.38mm |
2.36mm |
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21 Degrees |
2.64mm |
2.62mm |
2.59mm |
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22 Degrees |
2.89mm |
2.87mm |
2.84mm |
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22 Degrees |
3.15mm |
3.13mm |
3.10mm |
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Vespa Ignition Timing |
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87mm Rod Standard V50, Special, PK 50 (Standard Stroke 43mm ST) |
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17 Degrees |
1.453mm |
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18 Degrees |
1.306mm |
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19 Degrees |
1.167mm |
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97mm Rod Standard |
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17 Degrees |
1.401mm |
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18 Degrees |
1.569mm |
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19 Degrees |
1.745mm |
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20 Degrees |
1.931mm |
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21 Degrees |
2.125mm |
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22 Degrees |
2.328mm |
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23 Degrees |
2.54mm |
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24 Degrees |
2.761mm |
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105mm Rod Standard |
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13 Degrees |
0.829mm |
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14 Degrees |
0.961mm |
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15 Degrees |
1.102mm |
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16 Degrees |
1.252mm |
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105mm Rod Standard 150 Super, Sprint, PX125EFL, P150X, PX150EFL (Standard 57mm Stroke) |
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17 Degrees |
1.576mm |
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18 Degrees |
1.765mm |
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19 Degrees |
1.963mm |
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20 Degrees |
2.172mm |
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21 Degrees |
2.391mm |
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110mm Rod Standard Rally 200, P200E, PX200EFL (Standard 57mm Stroke) |
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17 Degrees |
1.561mm |
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18 Degrees |
1.784mm |
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19 Degrees |
1.945mm |
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20 Degrees |
2.151mm |
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21 Degrees |
2.368mm |
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22 Degrees |
2.595mm |
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23 Degrees |
2.831mm |
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110mm Rod Standard Rally 200, P200E, PX200EFL (Long 60mm Stroke) |
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17 Degrees |
1.661mm |
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18 Degrees |
1.86mm |
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19 Degrees |
2.069mm |
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20 Degrees |
2.289mm |
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21 Degrees |
2.519mm |
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22 Degrees |
2.76mm |
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23 Degrees |
3.011mm |
TIP for setting the ignition timing using a Beedspeed timing disc:
Lambretta and Vespa Example:
With the piston at TDC ( Top dDeadCentre ), make a white mark across tthe flywheel
nd tthe enginecasing. Place the TOP mark on the timing ddisc also
n lline withthe TDC white marks. Then move the Flywheel and Disc
anticlockwise the required amount of degrees BTDC and make another white
mark on the engine casing opposite the white mark on the flywheel – this
iis thes the timing mark for the required amount of degrees Before Top Dead Centre (BTDC). Either the points sshould openat this point oor theelectronic should trigger should operate.