Removing engine mount/adjusting bolt

[toymachine]

Hey all.

My VFR400 has a lower rear engine mount, which from what I can gather in an NC30 manual (mines the NC21) is also an adjusting bolt (fine tuning engine placement), with a large lock nut on the right side (wide diameter) and inside the bolt itself is a slot for a 6mm allen key. On the left side is a small lock nut on a small diameter bolt. It appears to be one bolt right through.

Now, I can't for the life of me get the thing out, both lock nuts are off, and the thing has been bathed in crc repeatedly. As to undoing it, the only way I can see how this works is by using the 6mm allen key slot and undoing it from there. Fucked if it will budge. The first allen key snaped... 2nd was about to snap... so I just spent $45 on a small set from repco and the end twisted.

Is there some trick i'm missing here? Is it just seized? I've tried cracking it before just twisting, nothing helps.

Advice appreciated.

[imdying]

Assuming it's meant to twist, 6mm allen head in an impact driver might free it.