Modern Vespa

Yuss!!! Look great sounds great!

Thanks Birdsnest.

So I am still learning lots.


I have realised I have made a blunder for my electrics. I am using LED's and need to make sure the LED is ac compatible. The one circuit I can seem to find 12v ac compatible equipment is the indicators. The 2 pin flasher relay is only dc that I can see and the small rear indicators and festoon bulbs I need only seem to be dc.

I have a 3 pin regulator installed. Could I use a 5 pin regulator/rectifier and run the indicator circuit off the dc (b+) output of the regulator like this one?


https://www.sip-scootershop.com/en/product/rectifier-sip-performance-typ-r102-classic-138v-dc-for-ignition-sip-performance-vape-for-vespa-50-125-pv-et3-pk50-125-s-125-v15-33-vm-vn-vna-vnb-gt-gtr-super-ts-150-vl-vb-acma-gs-vba-vbb-t4-gl-sprint-super-200-rally-2-px80-200-pe-lusso-cosa-t5-classic_51008220


The setup has no battery.

I thought you had to run DC for leds?

Not sure on a regulator setup w/o battery.

some LED's will take the AC. i used LED tail/brake lamps on my smallie with AC and it was fine. still working - ask greasy.

Convert your 70's US Vespa to No Battery 12V AC (Post 2140188)

Try this site for ac compatible led bulbs. https://www.superbrightleds.com/vehicle-lights/led-vehicle-replacement-bulbs?utm_campaign=Vehicle_Lights&utm_source=google&utm_medium=cpc&utm_term=auto%20led&utm_content=Auto_General&gad_source=1&gbraid=0AAAAAD_v0v8z_iR7puAu_-_vyOwqhF06M&gclid=EAIaIQobChMI-422wba7iAMVw0T_AR3OnAaOEAAYAyAAEgKeEPD_BwE
Good luck
Rick

Hey thanks all for this, that confirms the general approach of a non-battery set-up.

I am using a 12V 6Pole PK stator so I based the wiring on a non-battery PK model like this using the 6v ac horn I already had like this:

https://www.scooterhelp.com/electrics/wiring/PK_12V_6pole_no_batt.pdf

I have used the same 3 pin regulator like you have in your build and I have used a vespa et3/rally junction box to connect it all together which isolates the 2 blue wires and the 2 yellow so they get their current from the 12v conversion light switch rather than the old separate coil wires.

As I am using the et3/rally round indicator switch I have a 2 pin flasher relay which is LED compatible but is DC. I converted the rear brake switch over to a pusher and ran a black wire back to ground.


You are right some LED's are AC/DC, the headlight is a 12V LED AC/DC and my taillight is a AC/DC 12v conversion unit from SIP (https://www.sip-scootershop.com/en/product/led-lamp-rear-light-for-vespa-50-special-d-125-pv-0140162-et3-ets_56294200. I think my front pilot light was DC so I have ordered some ac/dc ones too. AC/DC LED Festoon bulbs are hard to find.

I think my problem is the LED compatible flasher unit, the only ones I can find come in 12v DC and the extra rear indicators I have to install are more compact and less ugly when in LED but are generaly DC too. The indicators turn on but dont flash.

I thought I may be able to conect the green wire (on the wiring diagram) that goes from the regulator to the flasher unit to the B+ (battery DC pin) of that replacement 4 pin regulator/rectifier I linked to earlier so that my flasher circuit was DC.

This is where my understanding of these electrics hits its limit as I am not sure if that b+ terminal is capable of doing so.

Spoke to some local suppliers and without a battery the simplest setup is all AC with the stator I have.

I am going to go back to the ac flasher. I might try putting in a resistor after the flasher to see if I can get the flash rate correct with LEDs. If not I will use standard globes for the indicator circuit.