Hi i have a yamaha maxster xq125 last wek while out it cut out i noticed a major oil leak, got it home cleaned it up checked around couldnt see where oil had come from wasnt much left in the scooter. refilled. been deriving again for a couple of days and just noticed on getting home, oil coimng out of the air filter. have a spare, oil everywhere again over back wheel etc. any ideas?

You can purchase a dye to add to oil, it will show leak location when you shine a light on it.
Check the attached links,
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Using UV Dye to help find oil leak
Tracer Products Dye Lite TP3090 0601 Gasoline Engine Oil Dye Reilly Auto...
http://www.garagejournal.com/forum/showthread.php?t=89730

engine oil dye

Oil will be drawn into the engine under heavy acceleration, irrespective of load. Check this before you worry! You might also check for any external leaks of oil or hydraulic fluids around the exhaust area which could cause white smoke at odd intervals.
Good luck

The only oil that can leak from iside your engine is from the gearbox. There is no sump as the engine is lubricated by the oil fed in through the induction system. Clean the area thoroughly and leave it for a while(overnight) then check again. The oil could just be overfill from the 2-stroke tank. By cleaning it first you are given new evidence to identify the leak point. Hope this helps, when you have more info let me know.

lights on motorcycles are not like scooters, they run off the battery. In the old days they had a separate switch, now they turn on immediately after ignition key is on.

it sounds more like crank case is not venting properly. check your PVC and make sure your not cloged.,

Your engine needs air to be able to move around so it doesnt turn into a pump. if you get your PVC clogged oil can start either burning or leaking past rings or spitting out of your gaskets.

try that first,
otherwsie i would have to asume you have a tired engine.

Yes. I would clean the engine with engine cleaner and then watch for any oul leaks. For you to use that much oil there would be a major leak. If no leaks check to see if blue smohe is coming out you tailpipe. If not keep an eye on is I this it will be fine if none of these things are wrong. I hope this helps. Don't forget to rate my answer. thanks.

Sounds like a leaking valve cover gasket. The parts are around $50 to do both cylinder heads from www.ecstuning.com. It's not a major issue, but it may be a sore point to a potential buyer.