|A salutary tale! (In the UK the law is to wear a helmet.)
The rhyming couplets work well but you might like to think about a pair for 'As a member of the heavenly Host.' On the other hand, the missing line does bring the poem to an unexpected stop - rather like poor Charlie.
I think, also, that the syllable rhythm could do with a bit of polishing, it kind of stumbles here and there. Do a syllable and stress count on the lines and see what you think.
Spelling and stuff like that is ok.
I do like the humourous way you treat the subject, it hits home the message so much better than a ream of lectures. I also like the way that you point out that Charlie wears his leathers, if you've ever done a slider from a bike, you will know how they save your skin, and the flesh underneath. Again, it underlines the consequences of Charlie's momentary lapse.
Overall - a really good effort, well done!
Have your gift points back - you deserve them.