If so, most likely the gear position sensor is leaking, not the gasket, although it may appear that way before you check the sensor.
As to checking the oil level I check mine regularly. My bike uses oil. I got it used and don't think it was properly broken in.
Found out my bike has been leaking oil. It's always "used oil" and I wonder if this could be where it's been going all along- seems likely. It's coming from the gear position sensor and is slow enough that it never drips beneath the bike and may only happen when the bike is running. If so, the...
www.r3owners.net
Mine was using oil with no sign of any leaks. When I took for a service last October the dealer said the oil drain plug seals were leaking (there are two of them apparently).
I'm lucky to have a very good main dealer locally with an excellent workshop, so I'm not questioning them, but I'm slightly sceptical that it could have been leaking so much from the drain plugs without any visible sign when the bike was parked up.
On the other hand, I chucked a litre of oil into it in 1500 miles and if it was burning that amount I would expect to smell it and see it.
I also bought mine used from a dealer. It was a little rough around the edges, no corrosion as such, but slightly furry alloy in places like it had been left outside in all weathers, and the odd scratch on the paintwork, which I would have thought an owner would have been more careful to avoid, so I suspect it was an ex-demo bike. I bought it on a punt sight unseen because it was a very good price. It could be that it was abused before properly borken in. On the other hand, it can't be that easy to abuse an engine this size...
So I'm reserving judgement. I'll see how it does when I get it back on the road in the spring. It's still under warranty until July.
What I will be doing is using the exact same procedure every time for checking the oil level until I'm satisfied I've figured out what's going on. Typically I tend to do at least 150 miles every time I take it out, so I'll be checking the oil level the day after each ride in the same way. Exact same amount of idling time to the second, exact same amount of resting before checking the dipstick. We shall see.