You need help. Sicko.
But if you must I'd try find an old 125mx chamber and adapt it to fit.
Read my thread about Petes TF. Some tips there but you won't go so extreme.
You want to bring it up to PE175 port timings. Find a copy of Graham Bells 2 stroke tuning, he uses one as an example. Copies have emerged online. Std they are made for peak power at a very pedestrian rpm. Even the TS is sportier.
Likely the suspension will be too soft. A preload spacer just increases ride height not spring rate. To do that you can cut a few coils off the tightly wound end and rebend the top coil with heat then grind it flat as std. YouTube should help here. Make up the removed length.
You can also often sneak another cm or two by lengthening the damper rods. You will have to check there is reasonable overlap .
I'd invest in better rear shocks for your backs sake.
Don't you look at my accountant.
He's the only one I've got.
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