230SX - Engine keeps dying

[Pwgsx]

My neighbor has a 2008 Yamaha 230sx, It will run good at high speed for several seconds but then one engine dies, dead in the water. The other engine keeps running just fine. The engine will start right up again but keeps doing the same thing. Any ideas of what I can help him look for?

[not2fast]

Ignition? Kill switch by clean out plug?

[Pwgsx]

I was thinking the kill switch but it only kills one engine, the other keeps running.

[steve45]

Kill switch under the rear hatch. There are two switches. Test it by taping a nickel under the hatch to push it down a little bit more. If that solves the problem, adjust the switch up a little bit.

[not2fast]

Did you figure it out?