Derby senda 125 sm not starting.

[Glen]

Hello dose anyone know,I’ve put a second hand carb on my bike and doesn’t start,do I need to change the injector,don’t know if there coded to Ecu.done all the normal checks,spark,fuel air.thanks

[ThePhatomfart]

Hi Glen , bit of confusion here matey, is your bike Carbed (which I'm sure it is) so dont know about Injectors , do you mean jets , and do you have a spark at the plug

[Glen]

Not sure how it works,it’s a 2013 and has a electric component on the side off carb,been told it’s fuel injected carb.??i not sure.its the same bike as Aprilia 125 sx.got spark fuel going to carb,not getting to plug.thanks

[ThePhatomfart]

Hi Glen not knowing the bike , but I think what you see there is a Throttle Position Sensor (TPS) Should have at least 3 Wires going to it, do you have a Workshop Manual or at least a Wiring Diagram for the bike?, Do you have a picture

[Glen]

Don’t and can’t find much about the bike.

,this is the carb.thanks

[ThePhatomfart]

Certainly looks like a TPS, its a Potentiometer to measure the position of the butterfly in the venturi, was that already on the carb when you got it or did you transfer it

[Stu]

Could be a auto choke

But to answer the question no coding is needed

[ThePhatomfart]

Yeh [mention]Stu[/mention] is spot on ,Electronic choke

https://www.robogoalkatreszek.hu/en/derbi/derbi-senda-125-sm-drd-racing-e3-4t-2009-vthdr2a1a/carburetor/electric-choke-device-cm142913

https://www.motorcyclespareparts.eu/en/derbi-parts/2013-senda-125-sm-drd-motard-motorcycles/carburettor

Not sure that this one fits yours though

[Glen]

Thanks to all,got something to be getting on with,I’ll change the part for my old one and see.lest I know what it is know.thanks again