<HTML>No 2-stroke will run for more than a few minutes after 15 years. Here's what to do: Take off the cilinderhead, cilinder and the pistonsprings (they should still be good if you've hardly driven the bike). Do you see that black goo on the springs and in the grooves for the springs? The springs will get stuck in the goo when you run the engine and you'll lose compression. You should clean the springs by soaking them in thinner over night and wiping off the goo the next morning. Use dentalfloss and WD40 on th goo in the grooves. Now remove teh carbondeposits in the exhaustport and put everything back together. (using new gaskets ofcourse) The engine will start after trying it for a few minutes and it'll run as good as new.