Badknee
LIFE MEMBER
Sorry to say @Knotties i think it will be well over the top. We have a Hobby 700 tag and have had it uprated to 5250kgs and were close.Not yet. I'm sure it will be close to the limit
We have a Yam 125 on our rack.
To get back to the OP, a 50cc wouldn't be very good plus rack will take your rear axle over. Get your van ready for a holiday, fuelled up, gassed up, food, clothes and wife on board and get weighed.
This is us ready for a six month trip to Spain.
Good luck.