No it will not without modding the bottom end
yes it will fit.
80 to 85 ft lbs 80 to 85 ft lbs torque to 40 first starting at center and stagger tightening bolts side to side ,each bolt till you reach the outer ones then tighten to 80 to 85
so of them will
it is out of a pass car between 80-85
It is: 85% of 80 = 68
Any smallblock Chevy engine will physically "fit" into a 85 Impala
Operating temperature: 80-85 deg Cent
The plastic would not fit the 85 because the 125 is a larger bike not only engine size but body size too.
85 - (15/100 x 80) = 85 - (0.15 x 80) = 73
Any of the seats from the 80-85 model years should work.