Word up Kneedown Do you have a 125 now to wizz about on? If so then a week between lessons is fine as you can practise stuff between. If you don't that's fine but you'll have a bit at the beginning of the day just remembering how everything works and getting in to the swing of things. The bigger bikes should feel more comfy for you. Most centres do a free assessment. It's a good way to go check out the bikes they have, meet the instructors etc. I imagine they'll recommend either a 4 or 5 day course - you should be fine on a 4 (which gives you plenty of training time tI nail those tests first time!)