Thread: dirt bike rebuild, are there any tell tail signs when its needed?

Take the exhaust off go T.D. torch in the port and look at the piston skirt ,then kick star lever lower the piston and you'll get a lookthru to the back of the barrel you wont see everything but you will get an idea of or if theirs any bad scoring ,if it looks bad it will give you an indication things mite not be so good else where internally ,other then general wear the biggest contributor to fucked engines are lack of clean air filters and oil i dont like running thinner oil thery be cause of the heat there 4 strokers produce viscosity go's out the window quick enough with out doing that, not knowing how to fit the air cleaner correctly is another , because these bikes run hot i have a rule of thumb ( one ride change oil regardless of hrs 2 ,4 or or 6 hrs and use full syn ) when i sell a bike iv owned it will come with at lest three used air filters ,even at some trail rides i change a filter don't matter if its hot dry wet cold muddy ,a trail ride still getting 200 plus k in a day unless your there to eat your lunch