RE: Ohlins TTX rear shock on
maybe try the suspension bit of KTMtalk
or PM harry reed , coppersmith or even javier would probably know.
how long is the stock shock eye to eye? my kt894 ttx was 409.5mm its easy to lengthen or shorten the stroke a few mm or shorten or lengthen the overall length.
just need an angle grinder and a lathe