Petrol odour from exhaust

[Oxygen]

I have a 1998 with 32k on the clock. I get a petrol smell from the exhaust even when the engine is hot. Is this normal and am I too used to my car with a cat with no smell. It idles fine and no other problems other than a bit of time to start from cold now more than in summer.

It has had new
Oil and filter
Plugs
Air filter
Fuel filter

I assume that it is just the age of the bike.