nice one chap you know it makes sense
i wouldn't worry to much about the smoke as long as it's not all the time,
me and the good lady wife rode up to calne bike day in july with a load of chaps from the bike club, and in true convoy fashion we rode to the slowest bike's speed, a 125 so only got to about 75 on the down hill bits, twas more like 55/60 most of the way there and back,
on the way home they turn off before me, and in true poser fashion, i dropped back, then went howling past em at a quick pace

later i had text about the smoke belching out, although apparently only for a few 100 yards and then it was smoke free
the upshot is i don't think they like to be ridden long distances like a 125

and they need a good blowout to stop em getting coked up
just a theory
but as mine don't drink a lot of oil, and runs like it should, it works for me