id ditch it, like others have said, it sounds like its reached the point where its just going to be a hole in the ground for you to throw what money you have into and distract you from your exams... she's been good to you, dont let it end on a sour note - im sure there's some budding mechanic out there who wouldnt mind a tinker or sell for parts, so i think you will get a sale, at least its 200quid in your back pocket to go for a new bike...mb put an advert in your local rag and school, see what response you get, mb even go visit your local bike mechanics and see if any of them will take her off your hands for a suitable sum? just my 2cents so to say ....