Re: Start power!
Welcome to the forum, Flathead. I'm guessing from your screen name that you know a little about eraly Fords.
"Low end power" tells me you're not interested in top speed. That's wise. These are after all motorized bicycles, not motorcycles and getting up from a dead stop to a decent cruising speed is important. A lower rear gear will help but will compromise your top end.
What size, tooth count, are you currently running. Most Chinese 2 stroke kits come with a 44T sprocket. That's okay for most applications but heavier riders and hilly terrain might require a slightly lower rear gear. Bigger sprockets are available, 48T, 52T, 56T, even bigger like 72T but realize that every step up will decrease your top speed potential but your 'get away' should satisfy your need for "low end" performance.
You didn't say how new the engine is or how many miles it has on it. A well broken in engine with 200 to 300 miles will give you better performace than a new one. Also it's never a good idea to start adding go-fast parts until after break in and then only do one addition or modification at a time. That way you'll have a baseline comparison to see what works, what doesn't and what needs adjustment.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"