I swapped over the rubber boot on the top of my 70k mile NC 6 speed today with new parts from MX5PARTS. The old one was somewhat worn and split.
When I took it off there was a load of gunk, worn old rubber ‘dust’ everywhere, so I undid the three bolts that allowed the gear lever assembly to lift out so I could give it a clean.
When clean it was obvious that the rubbing surfaces on the left to right limit plate was pretty worn on the left side. So when changing from first to second, the plate on the lever runs over a notchy worn side plate. I should have taken a picture, but if you have been in there you will understand what I mean.
I could not see a replacement part on MX5PARTS, and if it had not been raining I might have taken my time and tried to polish the surfaces up, but that would not have cured the wear.
My gearbox when cold is not great changing 1st to 2nd. 3rd to 2nd isn’t great either. The rest of the changes are OK. When warmed up, everything is fine. I understand this is pretty common with the six speed.
Now the question… has anyone changed the rubbing limit location surfaces? If so, where did you get the parts? And did it magically improve the shifting?