The TTR case is on the left and you can see the amount of metal that would need to be removed to install a TTR cylinder in TW cases.
I used a Dremel and water to keep the bit cool and from clogging up from the hot metal. See the scribe mark along the black paint so I do not take to much off.
Next a sanding to smooth it out.
I can explain it to you, but I can't understand it for you.
Powdercoated '87 frame, extended swingarm, YZ fork legs, ATV tire, 14/55, XT350 tank, spliced quick-release seat, disc brake conversion, beeg headlight, beeger rack, Lizrdcooler, Lizrdventz and bunch of other stuff all covered in invisible ink.
I see what you are doing, and it looks cool, but that doesn't mean I know what you are getting at...
Why are you boring out the TW cases and not using the TTR cases. Maybe I'm missing something but that's what I did. the TW generator side cover with the outrigger bearing fits it no problem.
The TT-R counterbalancer is different from the TW counterbalancer. If you're using a longer stroke, might want to use the heavier counterbalancer.
Did you happen to know which TT-R balancer came from what year? I expect the heaviest would provide the smoothest running stroker engine.
Boy oh boy, you have quite a project there. I suspect, at some point you will have quite the trailbike as well. Thanks for all the great pictures and info. Your project will make one helluv a sticking. Gerry
Take care my Friend.........