20-04-14, 08:39 AM
Sounds more like this bike has self converted to a 2 stroke!! :rollin IMO Yammys where always the best 2 strokes any how... joking apart.. if she's using oil then its being combusted so engine wear/bore n piston n rings is the factor here.. switch onto 10w40 SS and just keep on topping her up until she goes bang.. on an engine with that mileage she aint worth the hassle on a rebuild(unless you feel it necessary)... look out for a replacement block on Fleabay... from £150 - £400 for a minter low mileage. 
mokin
mokin
I am the Nightrider. I'm a fuel injected suicide machine. I am the rocker, I am the roller, I am the out-of-controller!