Nice bike, Cyberzar

indeed man...
I 've just measured the distance (wheel axle-top yoke)...

My stock XT 600 forks = 86+ centimetres
My new YZ 125 -//- = 91- -//-
Total difference = ~5 (five) centimetres.....(46-48 milimetres to be exact)
Regarding that even with the stock-factory front end, the back part of the bike was -already- kinda low and a lot of users without changing the front end, they although did fit an aftermarket shock (usually longer), I must be in seriousl trouble with 5 whole cm added to the equation...:confused1:
Please, let me be as noob as it takes...
I am watching at the interesting photos of Cyberzar. I am trying to understand, how the linkage works under load and what affection would happen if we were trying to fit a longer shock in the specific stock distance. I assume that the upper part of the swingarm linkage (the one that is facing backwards, to the rear wheel) should tend to touch the swingarm itself. For example, in Cyberzar's bike, there is a tiny little space (...about couple mm?) and is almost touching the main body of the swingarm. Suppose it is on the limit, on the edge of extension? Does this happen due to the longer shock? Or this is the "typical image" of a swingarm linkage, even with the stock-factory rear shock? (...please...try to be polite with a...non expert)
I 've taken some photos from my bike, although it's late evening here and the quality is not ideal, and I 've found that I too have an almost identical "image" of my upper part of the swingarm linkage. Almost touches the main body of swingarm. Is that a bad sign? Do I have any more "room" for a longer shock, or not? I 've also tried to take a photo of the lower part of that bloody swingarm linkage (tired of this word

). Seems there is more "room" in the bottom (I 'say -at least- 1 cm). Maybe I am lucky enough, and that specific space, between the lower linkage and the main swingarm body...defines the spare "room" I can take advantage?
(I 'll try to upload couple of photos)
Last one. What do you Cyberzar mean by:
"I extended the length of the frame tube (top side)."
In which direction? backwards? up verical? Any photos, please?
Thanx again for sharing knowledge...