The small shaft on the front is the PTO and is used for running various implements. My snowblower runs off of this with an electric clutch. The problem with this shaft is that it takes a wierd spline that doesn't seem to be available from any current source. Many people have tried finding it. I think there is almost enough room where the idler is located, leaving everthing else intact and disconnecting the existing dynamo. Might have to run with the left engine side panel off though, to maximize room for the alternator.