did you ever find out what the issue was? I have the same problem. Very difficult to find answers as only Euro bikes have HISS :-(

 

Yeah, new fuel pump and filter sorted it out. It was running rough on low revs nearly cutting out. That's why the hiss light was flickering

 

you sir, are one of life’s gentlemen. I’ll start there then thank you for your speedy response!

 

Have the same issue,have changed fuel pump/filter etc but no change.

Any further ideas or other owners with same issue and what has been done to solve the HISS light flickering at low revs.

Sorry for hijacking an old thread but clutching at straws trying to find solution.

 

for me the issue was actually the spark plugs. They were the original ones from the factory still 15000 miles later! Basically the HISS light will flicker as a byproduct of any rough running issue. Give the bike a good service and check all the components to do with fuelling and ignition.