just gave the zed another weekly check. found a vacuum leak and this hose is broken (pic) it is between the battery and fuel filter. what is this unit doing? currently i just block it, is it ok? thanks as usual
Vacuum control valve going to the carbon canister. Look to EF&EC section of workshop manual for some light reading.
this is what you are after http://www.twinturbo.info/ it can be deleted no worries. it's called the Pressure Regulator Vacuum Relief (PRVR)