Dude! It happened to me on my 636 last week! The end nearest the carbs popped off, spilling gas everywhere. Luckily the engine cut out pretty quickly and the fuel pump stopped. Maybe I unintentionally disconnected that end somehow, but I don't remember ever messing with it.
Gary M
www.bmgracing.com
CCS SW AM #28
'03 Kawi ZX636R
'00 Duc 748R
Gary M
www.bmgracing.com
CCS SW AM #28
'03 Kawi ZX636R
'00 Duc 748R