This is my TL250 which I use regularly.
The frame was modified before I got it but has been done well and helps a lot, I have built 2 engines for it, tl bottom ends with XL head ( bigger valves ) xl flywheel ( a lot heavier than the TL one strangely ) and with a nos powroll 280 piston. The other engine will be taken out to 305 again with a powroll piston.
The tank took a lot of work to get like that and each side panel was made up from 4 pieces, not from the same panels! ( I had a leg in plaster at the time so could spend plenty of time on them!)
I would be really interested in a works style 305 tank/seat for this bike in any condition.