[rotorwrench]

First thing I'd check would be a look down the throat of the carburetor and operate the throttle to see if the accelerator pump is working. That will also indicate if there is fuel available in the float bowl. You can pull a plug and lay it against a ground source in the head someplace and turn the engine with ignition on then see if you get spark. With modern condenser quality being very poor these days, I tend to check it first if the spark in weak or non existent. Burned points would be the indicator of a bad condenser. A good rule of thumb is to start with the easy stuff first and hope it's something simple. Plugs could have gotten a bit fouled. A quick cleaning would remedy that.