Look here:
http://www.maltapark.com/item.aspx?ItemID=3773045
I've seen 2 young lads riding on these in Bugibba. They were very noisy and extremely fast. I was thinking they had made them themselves, but now see a lot of advert, so they must be manufactured on a (small) industrial scale.
They have 80cc engines, so could easily get up to 50km/h or more depending on gearing fitted. I know normal bike's frame, wheels, bearings, tyres or brakes aren't made to go that fast. I also see no safety or protective gear such as helmets are worn!!
I thought to ask and find out as a matter of interest:
What is the position of Malta on these?
Are they road legal?
Can anyone shed some light please?