clutchless gear change

[chaz]

A friend is a mechanic and a racer. He says:

"Just go on doing clutchless upshifts - more work for me.      You can do it on the racetrack, but doing it in the street just needlesly damages gear teeth."

I still do it - 30k kilometres - still no problems with the gear shifter. Hope I haven't cursed myself. I only sometimes use clutch from 1st into 2nd. But not always.

as far as I understand bike gearboxes which isn't very far, they are constant mesh so the gear teeth are always meshed and they slide along the shafts using the dogs and splines to determine the drive? Although a triumph 21 I used for tracking did strip the first gear by clutchless starts after the clutch had snapped?