Timing or lack of fuel
.5 / .6
the gap is 0.024
yz 125 use the same plastics from 1996 to 2001
no i have a 2000 yz 125 and can beat a kx 125 blind folded
no it will not
NGK BR9EG is the correct plug for a 2001 Yamaha YZ 125
I'd say check your owner's manual or call your local Yamaha dealer.
yz 125 are considered a classic not an antique because of the technology put into it
I have a 2001 Yz 125 stock Gearing, Fmf Pipes. 60-65Mph
The horespower of 1988 yz 125 is 33hp or 35 with fmf fatty pipe
Most spark plug gaps are very similar from the point of view of sufficiency. The thickness of your thumb nail will suffice. Not tight though.
with a little snipping there should be no problem. if you don't mind doing a little hand work. it's possible because i slapped 1999 yz 250 plastics on my 1990 yz 125.