I got a margay recently that is lo specific. It seems they are flexier than the TAG compkart chassis I used prior.
Personally I’d go with either of those two engines and the appropriate frame for the engine type. Odds are you’ll wear out the frame by the time you decide to switch engine packages.
Lo vs Ka100:
Ka100 is two stroke and feels so very good. It goes braaaap and has power. As far as two strokes go, it’s quite economical.
Lo206 is 4 stroke and very low powered. It’s a momentum based driving style that teaches you to be efficient. It is also very fun, particularly for a newer driver as the speeds are a bit lower and the acceleration is tepid and not likely to spin wheels. It is ultra inexpensive compared to two stroke, both to buy and maintain. So, there’s that.
From my experience, (I started in 100cc and then went to 125tag), you’d be doing yourself a favor doing lo206 for a season or two. The lower power keeps you from being a savage and forces you to learn how to drive efficiently. Then, when you jump into more powerful engines that can break traction easily, you will be ready. This is only relevant if there’s a healthy lo206 field. End of day, the fields with a good crowd is where you want to be, ideally.