So let's assume I'm on 1st gear.

Shift down to second works, third works, fourth, fifth, sixth all work.

Does not shift to seven...except on a rare occasion.

Now shifting up it gets weirder.

Let's assume I tried to shift to seventh, but it's still in sixth gear.

Shift up to sixth, gear stays in sixth.

Shift up to fifth gear, gear stays in sixth.

Shift up to fourth, gear moves up to fifth.

Shift up to third, gear moves to fourth.

Shift up to second, gear shifts to third.

Shift up to first, gear skips second and goes right into first.

Then I can shift down gear by gear except it never reaches seventh, and all the above can be repeated.

Also, when shifting up I sometimes have to coax it by slightly overshifting to the next but not enough for the shifter to engage - i.e. halfway to third from fourth and it'll shift to fourth.

Tried messing around with the limit and tension but I'm not certain I'm picking what's right. Headscratcher.

Suggestions?

M.