$2,700 · 1999 YZ125

Good condition. New top end this spring. Approximately 10 hours on it. New standard bore Athena high compression cylinder kit. Kit has replaceable domes for the head. 14.8:1 compression ratio. I used a thicker base gasket to increase the squish clearance to 1.3 mm so I can use Chevron 94 octane pump gas. Can go to 0.9 mm squish but that will require race fuel. Bike has good low end power. Set up for woods/trail riding. IMS 3.6 gallon fuel tank far outlasts me. Aluminum skid plate, hand guards, New FMF Turbinecore spark arrester, pipe protection. Bike has a Noleen pipe which is no longer available but are the best pipes for late 90's early 2000's YZ's. It has its dents but they don't affect the power. Athena cylinders cost around $500 and they're plentiful as opposed to OEM which are around $900 if you can find one. Piston kit is around $150 for Athena flat top piston which has to be used with this kit. You cannot use domed pistons only flat top with this head insert. Bike rips and has no problem hauling my 200 lbs with gear around. Well maintained. Gear oil change every 3 rides and only synthetic 2 stroke premix. Comes with Haynes manual. Also have the original shorty muffler. o.b.o