TE310 2009 electrical fault finding

That will work. I checked the part numbers and the 250/310 head is the same item. Only the cylinder/piston is different.

Ok to close this out I managed to fix the starter button which was one of the starting issues. It was faulty .

I put a new piston and rings in and the inlet valves were replaced

After all that I finally it started but would keep stalling and seemed to be restricted of fuel - starved at high revs

I bought a new fuel pump and have just fitted that . I noticed there was no filter in the tank .
I fitted one with the pump . It starts easy and idles well and seems better at high revs but its got a big lean hesitation / bog when opening up the throttle riding up the road.

Not sure what to do now .. fun and games .

I would get the fuel injector cleaned first.

Then check the rubber intake boot for delamination (leaks). If it has cracked it will cause lean running as it’s letting air in. I went through 3 with my TE310.

The fact it idles and revs means everything is working but something is making it lean. Given it’s fuel injected and the ECU controls the fuel supply it is either not getting the requested fuel (injector clogged) or you have an air leak leaning out the intake charge.

Have you used a fresh spark plug as well?

Thanks - is there a fuel pressure regulator ?

also When i rev it it seems to have like an over rev . ie when you turn off the throttle its slow to back off . Its the opposite of snappy.

I am not sure if its still the wiring issue with the pump . the pump is cutting out ? The pump primes every time I turn on but some times the pump primes randomly when im moving or fiddling with the bike .

Is there a fuel pressure regulator?
I believe it's inside the pump assembly (https://www.fuelperformance.co.za/index.php?route=product/product&product_id=4845)

Overrev is usually when the fuel mixture is too lean. Check out this post as well http://www.cafehusky.com/threads/2009-te310-bogging-after-new-fuel-pump-and-regulator.87876/

Do you have access to an ECU cable and iBeat? You can check the TPS, MAP and coolant temperature sensor readings.