Honda versus Huasheng w Belt Drive Trans

IMHO, the Honda GXH50 is not worth the price premium over the Huasheng. The Honda _is_ the better engine but over twice as good (price)? No.

Honda GHXH50 Pros:
It's a Honda and has Honda build quality!
Runs a little quieter, has slightly more power
Has a real 5/8" keyed shaft, works great with B-E's 4G or the EZM Q-Matic

Honda GXH50 Cons:
Costs twice as much or more compared to Huasheng
Has a governor and low oil switch - both should be disconnected
The carburetor isn't set up for our throttle, needs either a linkage kit or a carb swap
Real Honda replacement engine parts are not cheap should it need to be rebuilt

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Huasheng Pros:
Costs much less than a GXH50
Doesn't have a governor or low oil switch
The carburetor is already set up to take our throttle
Has almost the same power and reliability as the Honda (some here have logged over 10K miles and still going strong)
Replacement parts are very cheap should it need to be rebuilt

Huasheng Cons:
The carburetor can be finicky, may need cleaning or even replacement
The intake/exhaust valves may need to be adjusted more often than the Honda
Some newer Huashengs have sealed adjustment screw on carb, may need plug drilled out
The 5/8" shaft version isn't really 5/8" (needs a shim)

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Either way you go, the GXH50 and Huasheng are great little engines. They can run hard all day and have excellent long-term reliability
as long as they aren't overrevved too much. If you keep em under 8K RPM, they can run quite a long time before a rebuild is needed.

When considering what transmission to use, that's going to be up to you. The 2 most common are the 4G and the Q-Matic.

The 4G is cheaper, more compact, offers better off-the-line acceleration.
The Q-matic is more expensive, larger, offers better long-range cruising.
Do some forum searching to figure out which one you want.

I have had a huasheng 4g kit for almost a year now with no complaints. Used a huffy panama jack from walmart. durable engine and trans, the rest of the kit is cheap crap.

I forgot to mention, I've had a Huasheng and 5:1 (100T) 4G on a SBP shift kit for over 3 years. Just passed the 8K mile mark and still running strong

With the same rear sprocket, an engine with more reduction (higher numerical ratio) will have a lower gear. Simply put, better low end.

Examples:

4:1, 12T output, 48T wheel sprocket = 4 * 4 = 16:1 overall (~34MPH @ 7K RPM with 26" wheel)
5:1, 12T output, 48T wheel sprocket = 5 * 4 = 20:1 overall (~27MPH @ 7K RPM with 26" wheel)

16:1 overall is pretty much ideal for all-around performance with a single-speed setup.
A typical Huasheng has about enough power to attain ~36MPH on a flat without wind.

So didja get it built yet?

You bought the kit from gas bikes?