I have always thought it bordering on the miraculous that 2 stroke engines actually run without siezing. Revving their nuts of,with just a dribble of oil mixed with the petrol to lubricate the crank bearings,bore,small end etc. It shouldnt really work but it does.
The quality of the oil has improved greatly though since the advent of synthetic oils.
I (along with many others of my age group) still habitually tend to ride a motorbike with the fingers of my left hand hung over the clutch lever,as it was often necessary to pull the clutch in sharpish on 70,s 2 strokes when you felt the engine start to tighten up. 
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As a young teenager I had loads of bikes for tracking. One was a BSA Bantam. The throttle cable snapped so I slipped it over the frame beind the tank and attached it to the rear brake pedal(having disconn'd the rear brake). The clutch cable always jumped out of the socket unless you permanently rode holding the slack. Our neighbour who was old enough to go on public roads and had a 650 bike asked if he could borrow my bike. I explained the workings and pointed out the front brake was very good! Be careful.
What happened was best explained by the lady riding the horse. A speeding m'bike appeared, saw me and went to slow down. But accelerated, went to use the clutch and it had dropped out of the socket so applied the only thing left the front brake which pitched him off the bike.
