Wow, you poor Bugger Dave, what a crime it is that VMX overlooking your beloved post 1978 bikes. My overburdened heart bleeds for you. I was so inspired by your cry for help that I decided to do a little detective work and do a head count covering the last four issues of VMX in a bid to help you in your campaign to get more of your favourites in the mag.
Guess what Dave? The magazine is already looking after your interests. Starting with issue #30 and going through to issue #34 we find that overall there were 4 pre 65 feature bikes, 14 pre 75, 6 pre 78 and 16 of what we'd call Evo bikes.
That to me looks like VMX magazine is indeed covering your narrow interest more than any of the other divisions. That would mean that the forty somethings must be cock'a'hoop over the VMX mix.
Being a VMX reader Dave, I'm sure you knew that but it seems that you want even more. Well, being in England you're front row centre to open up a campaign to Classic Dirt Bike for more post '85 bikes in their magazine. I'm sure they could fit the odd post '85 motocrosser in between their trials pieces. Or, you could approach Retro Racer in the USA and ask Mr Doughty if he would like to help you out with your need for more post '85. I'm sure he could fit something in between his anti AHRMA editorials and old road racers.
Dave you need to stand back and appreciate the fact that there is much, much more to this movement than your own narrow perspective. VMX magazine has an obligation to cover all of the factions that constitute the world of VMX and they're doing a brilliant job keeping everyone happy. Sure, from time to time the mix may be a little lopsided but eventually the imbalance is corrected and all factions are treated fairly .
There is another alternative Dave. You could always start your own magazine, call it 'Single Shock' and sit back and watch your money go down the gurgler quicker than Graeme Noyces career.