Quick view Kawasaki 1980-1985 Yamaha YT125 Tri-Moto Cylinder Boring Service Compare MSRP: $100.00 - $300.00 1980-1985 Yamah YT125 Tri-Moto Cylinder Boring ServiceCommon engine problems: low compression, oil burning, poor performance, or visible cylinder wear.This service will restore compression, stop burning oil, increase horsepower and extend engine life... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List