Re: sv650s K5 won't idle when petrol isn't a full tank (running rich)
ageing battery, spark plugs, Rectifier/Regulator i would say are the three main contenders to look at first. i had pretty much the same symptoms last year and it turned out to be a duff battery even though the battery took a charge.
less common is the ignition and the Rectifier/Regulator connectors and the mantels in the injectors.
you can check and roughly adjust the TPS without the engine running.
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