How likely am I to be able to get finance on a motorcycle at 18?

I am currently 18 years of age and want to get a nice new 125cc (honda cbf125 or yamaha ybr125/mt125) for running around London, how likely am I to be able to get it on finance and what does it depend on? If anyone could explain this in simple terms that I d understand then I d appreciate it, I have no license yet or anything but if I am able to sort out finance etc. Then I ll be getting my cbt done.

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