I have a RT100 dirtbike that I just absolutely cannot get to run. It used to run about 3 months ago, but now it doesnt, has good compression, sparks good, and the carb is clean as a whistle. Any ideas? I'm thinkin it has to be the carb, I'm going to try and find a new one on ebay or somewhere.

 

hhmm what was i gonna say... is it getting fuel??

 

could a hose r soemthing b clogged...

 

It takes fuel, compression, spark, and..............timing.

Crank flywheel key sheared?

 

Unless the carb is broken, why would you replace it? Just clean it out and check the float level, replace all the jets if you feel like it, but it makes no sense to replace it.