Petrol / gas smell from bike in garage

[headache56]

My FZ6 currently runs really well and its a great bike. It never smells of anything.

However, my son's friend has just bought an used Honda 2-stroke, it is a 125cc with a sporty look and sound but I do not know the precise model.

Anyway, sometimes I come home and find a strong smell of pertrol/ gas in my house, because this old bike has been has been been parked in my garage overnight. There is an air/ventiltaion brick in the divding wall between my house and my garage.

All my bikes have been 4-strokes so I wonder if 2-strokes are inherently very smelly? I guess not and that the smell is probably caused by a faulty fuel line, faulty fuel breather tube or a loose pipe connection ? Does this seem reasonable to you experienced folks ? Any steer would be much appreciated.

 

[macem29]

2 strokes are definitely less refined engines than a modern 4 stroke,
in my experience it's not uncommon to have an older one that stinks,
they burn oil with the gas and the exhaust system gets pretty sooty
and it's an oily soot, yep, they do stink, every two stroke machine I
own does, chain saws, trimmers, blowers, bikes, all of'em, but I would
still check that thing for a leak to be safe

 

[616ah]

Two strokes do have smell issues - but raw fuel while parked is not really normal. Do you have a leak? Checking it out would be a good idea as breathing fuel fumes is known to cause health issues, also "unplanned combustion events" in your garage are possible if there is enough of it.

One thing that comes to mind is filling up just before parking - as the fuel warms/expands it may drip out the overflow tube or vent a few hours later...