Hi I have added a little engine oil in my bike but it looks like it has now gone over the max line. Do I have to drain a bit out or will it be OK? It's mixed reviews when I search for it but most say drain off. I'm new to motorbikes and to have mine repaired just cost me near £600. Manifold, front brake disc and pads, carb clean, new front wheel, gasket, o-rings, but my bike was a little spluttering after all the work and my engine oil looked low, thought the garage was pulling a fast one to get more work out of me. I'm trying to find a manual online so I can start repairing myself. Any advice please