Has any one actually measure the bore or is this an assumption? You turn a 350 V8 into 373 V8 by swapping in a 400 crank. No bore change just a little longer stoke.
WOW those 53cc motors are all over ebay now. Could be 142f's for all we know. If they are real 144f's in size I'd still be more confident in buying a Grubee at $210 and know it's a real Huasheng motor.