You should whip the guy who sold you that thing! (Kidding, it was me.)
FYI - I never had it do that to me. Or anything else, bike was totally reliable.
My old DR650 would cut off turning left like that from the choke as was mentioned. With the tank off it didn't do it, just enough extra stretch with it on that it did. Rerouting fixed it but it was hard to find, I thought sure it was electrical.
Gaspipe surely knows more than me about the thing. I do know that what I saw of the harness/connectors on that bike were all as new and clean.
Sorry it's being cantankerous.
Is the clutch interlock still connected, maybe being pulled on? (I never removed the interlocks, don't know why - first thing I did on my DRZ and XR).