Looks like you’re going a bit past where it should go. On mine the counterweight is flush with the shift shaft.
That's odd bc MWR sent the shift shaft assembled how it is currently. Just to confirm, is this correct? (upright positions, the side the counter weight is going on, etc.)The shift shaft appears to be upside down. The notch should be on the bottom. It is possible for all of the internal levers to be installed upside down. The assembly has to be pulled from the transmission, the roll pins knocked out, and the levers flipped over.
Thanks! That helped out a lot!It looks like the shaft is assembled correctly, but installed upside down. The circled section below should face downward and engage the shift forks. Note the notch is at the bottom as well
View attachment 89460
So with no cables connected, you can shift by manipulating the counterweight, but with the cables connected, nothing happens? It seems clear that your cables are installed wrong. Maybe they are switched. That could give you the impression that everything was locked up.... it doesn't seem to want to move when connected together and with the two shift linkages connecting to the gearbox (shift and select). But when taking the linkages off the mechanism, the gearbox shifter works as it should...