So I finally got around to pulling some of the bits off the zzr...stock exhaust,tank seat unit etc....Put it on the scales and it was about 160-170 kg (dry weight,stock exhaust weighed 12kg alone !!)
So the boss tried it for size and found she could move it around as easy as...lower seat and less weight..."I could ride this easy" were her words....
So before I get involved in frame swapping I'm gonna give this a go....
Got a bargain price zxr400 f/end (should bolt straight on) and rear wheel...
I'm going to remove the lowering links from the rear suspension and make a new rear subframe to get the seat as low as possible.
I'll be changing the swing arm too...its got a huge cast lump at the front....must be summat lighter out there...
Starting point....

