Keeping the power system identical, I’ve made several suspension upgrades.
Today, I’m testing the speed of “The Frog” with three major chassis modifications.
Let’s see how these geometry and tire changes affect our top speed.
Power System and Three Suspension Upgrades

The power system remains the same as my previous test run:
- Motor: YOKOMO ZERO3 8.5T
- ESC: YOKOMO BL-EP6
- Battery: LiPo 2S 7.4V 50C 4000mAh
For this session, I modified three key areas of the suspension:

Full details on the rear modification are available in this article.

You can check the details of the front arm swap in this article.

Read more about the tire selection in this article.
Speed Test Results at the Park
I took the modified buggy to the park to evaluate the new setup.

The GPS speedometer clocked a top speed of **49.9 km/h**!
This successfully edges out my previous record of 49.7 km/h.
Thermal Issues and Future Solutions
However, I noticed a performance drop after a few high-speed passes.
Upon inspection, the ESC was running at a very high temperature.
This speed drop was likely caused by the ESC’s thermal protection kicking in.
To maintain consistent performance, I am now planning to install a cooling fan before the next run.
Conclusion
The three suspension adjustments successfully squeezed out a slightly higher top speed.
At the same time, it highlighted the critical need for proper thermal management with high-power electronics.
I’ll add a cooling fan and push for an even higher record next time!
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