I have a Polaris 250, 2 stroke. The oil pump drive gear disintegrated due to age It’s made of plastic. I ordered a top end kit, crank bearings, oil pump gear (steal)!
I had the cylinder bore 10 thou. Starts right up and runs great until it warms up. Then want to die at an idle and seem to run hot like it is running to lean. I brought up the needle on the slide to richen it up but it runs very rich. ( 2 stroke pop chug pop) Like they do when running rich. I wonder if the WSM piston is not expanding when hot or if the bore job was a poor job.
