Who doesn’t want to add a few extra miles, am I right? Careful though! If your mini bike is for children, it’s best to leave it like it is. But for adults and teens who are looking for a little more fun, here are the few things you can do.

Torque Converter

Swapping out the centrifugal clutch transmission system for a torque converter is our favorite modification. For most of you, this is the only change you need to make. It will add 10-15 mph to the current top speed of the minibike without affecting the low-end torque needed for the 19″ tires.

It can also come in handy for hill-climbing, especially if you’re on the heavy side of the weight spectrum. A CVT will provide the minibike with a lot of torque at low rpm, making it easy to take off and drive up on the slope.

How to Install a Torque Converter on the Massimo MB200?

The Engine shaft in the Massimo MB200 is not the same as predator or other Honda Clones, installing the Torque Converter will require some (simple) grinding work and a Dorman 611-107.1 Lugnut (Amazon Link).

The Crankshaft of this mini bike is externally threaded, it will look somewhat like this:

This external threading means, you won’t be able to put on the driver pulley of the torque converter unless you use a Lugnut (mentioned above).

You’ll also need to use a Dremel to grind the internal key of the driver pulley’s slider so that it fits well with the Lugnet and some machining work will also be required on the mounting plate of the CVT.

Overall, it might seem like too much work, but it is well worth the effort. Torque Converters are a huge upgrade from Clutches for any minibike and as said earlier, for most people’s needs, it is the only upgrade that is needed.

Governor Removal

The Engine has a speed governor that limits the engine from making more than 3600 rpm, the governor can be removed, which will give the engine the ability to make near 5000 rpm, making it nearly 1.5 times faster than before.

Note: We strongly recommend replacing your stock flywheel and connecting rod with a billet flywheel and a billet rod. Even though many people run their Minibike without a governor on a stock engine, the internals is not good enough to withstand high RPM for a long duration.

Stage 1 Kit

Stage 1 kit comes with a better air intake and exhaust which will allow better air circulation.

The kit also includes a larger main-jet (0.36 and 0.37), a bored-out emulsion tube that will help the carburetor to take in more fuel, an 8-degree advanced timing key, and an 18 lb Valve spring.

Note: Once the valve springs are upgraded to 18 lb or more and the governor is removed, it’s absolutely necessary to upgrade the flywheel and connecting rod. If you do not want to buy it, do not change the valve spring or do not remove the governor.

Overall, this kit will give you a nice boost in power without extensive modifications, you can expect 3-4 hp increase in power. The only downside is that your minibike will make a lot of noise due to the new exhaust pipe.

Stage 2 Kit

Stage 2 kit has everything from stage 1 + a Non-EPA style carburetor.

We recommend getting a Mikuni VM22 knock-off carburetor and the stage 1 kit instead of buying a stage 2.

Other Modifications for Performance

Here are some more mods that can be made:

Please Note: You’ll probably never need to go to such high speeds. It can be extremely dangerous. If this is your first mini bike, we highly recommend just installing a Torque converter. That is more than enough.

Once you’re comfortable with a CVT and still want more speed, then you should move on to other modifications.

Conclusion

Massimo MB200 is a solid competitor for Coleman CT200U-EX, Tailsmaster MB200, and other mini bikes of a similar category. It’s available in different colors and looks similar to the classic Baja Warrior MB200.

It comes with a Honda GX200 clone engine and produces 6.5 hp power from it’s factory condition, uses a clutch and jackshaft as a transmission system with a gear ratio of 10:1. The top speed is advertised as 25 mph but in reality, it would be fair to expect a few mph lower.

It can be heavily modified to go nearly 2-3 times it’s initial speed. The only major con about these mini bikes is that their engines come with external threading in the shaft making it hard to install a Torque Converter (which can still be done after some machine work)

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