Hey Miles, welcome to MiniRiders!
The RevMX has far more "great" features than just the linkage. I was part of the design process, and given i had a bit to do with the bike's inception, i was pretty picky with it in my review... I'm also possibly a little picky owing to the fact i've been riding 28 years, with the majority of that spent on Jap MXer's... so as far as reviews go, i might be a bit more condemning than most...
HOWEVER, the Revmx has a many brilliant features, and is a very well appointed, and excellently priced bike, particularly when compared to similarly priced bikes... If you can find a linkage bike with high end suspension and 155z motor for $1900, grab it...
From a handling perspective, the Revmx is a huge leap above non-linkage minis. Traction in the rear is a long way from what a non-linkage bike is capable of, and while the forks are pretty stiff, it's a simple fix to soften them up, and get them tracking as well as the rear...
Braking is very very strong on both ends, strong and progressive in the rear, and the front is capable of standing the bike on it's nose with one finger... so far i've not had an issue with the brakes...
The engine is the second generation 155Zongshen motor, also known as the 160HO... upgrades include cam work, head work, closer internal gearing and a six plate clutch... so the chinamen tell us....
Starting is very easy, and it would appear to have a decomp cam in it...
So far i've found the engine to be reliable, and offer very strong performance right through the rev range, and is ample in power for the bike.
Being a relatively new motor, long term reliability is yet to be determined, but if it's anything like the 155z it's replaced, it will be a good motor if cared for properly, like any other motor...
Another "great" part about the Revmx is the general appointments of the bike... billet 1/4 turn throttle, OKO26mm Flatslide carby standard, DNM M200 forks, UD-DHL Hi-Lo shock, on the fly alloy clutch and perch, Braided lines on the brakes, strong frame and nice half-waffle grips... compare prices with other brand new bikes, and then compare the parts lists, i think you'll find the Revmx comes out on top by quite a bit.....
As for the fuel cap issue, i'm not sure if that's been rectified, you'd have to ask Russ from Revmx...
measurements are as shown below... the bike looks big in pics, but it's decieving... it's about the same height as a midsize mini, but longer wheel base...
Seat height: 820mm
wheelbase: 1185mm (approx, depends on chain adjustment)
bar height: 1100mm
width:790mm (bars) 430mm (pegs, very narrow.
)
weight: approx 72kg i think
hope that clarifies things a bit...
For the price of the bike, the spares kit, and the performance of the bike in general, you'd be hard pressed to find an equal bike for the same money...