Re: Tandem owner - new here
There's a lot of excellent information here on the motorized bicycle forum, Mac.
Run the search for 'predator' and review all the information in the threads to get the full story.
Bottom line is, with your tandem, you will want all the torque you can get.
And considering your wife will be accompanying you, the predator offers lower noise levels and improved reliability over the HT engines.
I'd advise the 98cc model which you can pretend is a quasi legal <50cc assist.