Lambretta And Vespa
Ignition Timing Information
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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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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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 |