The idiots strike back...
I rode two petrol power motorized bikes for 2000 miles+. The first was a Raleigh MTB with a 22cc two stroke motor from Golden Eagle bikes, which was stolen. The second which I still have is based on a Cruiser frame with a 33cc piped two stroke.
Both are capable of 30, the D7 of 38mph but that has a tuned pipe on it. The latter one I upgraded the brakes, lights and various other equipment - all simple things to do and got the brightest lamps I could lay my hands on.
The piglets locally didnt have a clue what to make of it - one tells me its entirely legal - another verbally abuses me, gives me 6 points for driving without insurance (its a SODDING bike) - and his boss flat out lies through his teeth after I threaten to go to the IPCC. Not to mention he plainly had no concept of cycling since his comment at what had been the brightest LED tail-light on the market was 'thats small isn't it' - notwithstanding the fact you cant even look into it without literal pain - your eyes actually hurt!
The only accidents I had on it was dropping it on wet pavement at speed (a lesson learned, and a brake handle destroyed - wet road and front brake, bad idea) and some dozy Asian girl who walked out in front of me glued to her mobile phone completely oblivious (goddess knows how, the thing sounds like a hornet on methaphetamine run through an guitar amp).
I agree with the people who say that speed actually helps cyclists - the faster you go the safer you are, end of. There is a steep hill near were I used to live, cars parked on both sides, and a bus route. The 22 bike wheezed a bit on it, but the D7 flew up it at traffic speeds - which is much safer than toiling up it,swaying all over the place, doing barely walking pace, in a lovely shade of puce... millimeters away from the front of a 65 bus.
But heres the thing. The D7 bike cost me about £1000 all told - would sit at WOT all day without complaining and would do 22+ miles on 600ml of petrol, with some still left.... If you said I could have gotten 25 out of a tank thats 189MPG - full throttle all the way. Average speed of 28mph for the journey. Top roadspeed on the flat, 35mph.
I am now driving a car, doing the same journey. If I am really careful and hypermile the car gets 28mpg or so, even the best diesel manages maybe 65-80mpg - and on a bad trip the average speed is 15mph!
The government have no interest in cutting carbon footprint - if they did they would actively sponsor machines like mine, not treat people who are actually making massive carbon savings, taking a car off the road, and travelling efficiently, like target practice for traffic police with PMS. Thats not to mention there are various people online who have converted their bikes into cargo haulers for businesses. A fully-sus MTB based 22cc GEBE was able to carry over 600lbs of equipment without problem, using just off the shelf components fitted to the bike alone - that wasnt including what it could have towed via trailer. The 33cc 2S GEBE could probably pull half that again. Add that to the fact you can buy a frame extensions off the shelf that will allow you to seat 4 people in tandem & still make 25-30mph, it makes you think...
Government... if you want to save money, save resources, free up money in the wider economy and generally improve peoples lot. and ironically health, then Electric assist and Petrol assist bikes are the way to go. Most people who build their own bikes take alot of care about it, and finish them to a high standard - a simple check would suffice - not the same palaver for a motorized bike as for a Caterham 7.