ORIGINAL: English J3 piper cub
Thanks a lot Allan.
Matthew
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You can fly it in on the model. Just don't tune it super rich. No need to do so and it isn't good for ABN engines to be ran super rich, although many of them won't be hurt by it. Still, a slightly rich two-stroke is preferred.
Try not to fly it at full throttle all of the time, if you can help it. Let it build up some heat and then throttle back and let it cool down. Four or five flights like this should have your engine broken-in satisfactorily.
Ed Cregger