My honda 125 from 1986 wont start anymore. And how can i get it to go faster. I already have a 300ex stock pipe on it any suggestions?

 

Have it rebuilt with a larger high compression piston and have the head ported. Add a longer duration cam and run race gas. Your best bet would be to sell the old Honda and get something new like the YFZ450 from Yamaha

 

Try adjusting the valves before you panic.

 

try doing a carb job soaking all the parts in cleaner, then change the spark plug, and fresh oil. as far as power gains, a bigger piston, machine the head and add the k&n air filter. that should get you some extra power.