I actually had a English Bullet Trials bike , but it was almost sixty years ago and I can't remember to much about the bike!
But if it had been bad I probably would have !
I recall riding it for a week or two without a clutch cable so the neutral finder was real handy.
Had it downtown when the Aston Martin from one of the Bond Movies was in town for the Edinburgh Tattoo, Managed to out drag it away from traffic lights , it just flew when you slipped it into gear without a clutch, and I knew the light sequence to the second so I had a flying start!
Most roller bearing cranks are pressed up , as it is a bit tricky getting a one piece rod over the flywheels. The old floating bush was never a weak point anyway unless you were planning on trying to get another2000 revs / 15 HP out of it.
Most recently Nicole has had a Bullet ELectra for six years/ 55000 km , it has been almost trouble free and it is a really nice bike to ride.
Feels lighter than the Hima, nice turn in and , like the Hima, well dialed in suspension, much better than you would expect from basic components.
They are a thumper, so yes, they do thump , but I found it a pleasant feeling, not a unpleasant vibration.
The Electra feels fine thumping along at the State limit of 110 km/hr , the BT might have lower gearing, but if you are going to fit Trials tires you wouldn't want to run them much more than 100 km/hr anyway.