Anyone Running a ESP Modified 30.5cc CY31RC Engine?

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MonsterAir

Lone Racer 🤠
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My ESP 27.2 motor suddenly lost it's umph today and stalled on a high speed run never to start again. Checked compression and it maxes out at 60 so I went looking for a new cylinder kit and came across this motor at ddm- http://www.davesmotors.com/esp-modified-chung-yang-31cc-cy31rc-engine-4-hp_2.html

They say it put's out 5.5hp compared to the 4.5hp of the 27.2 for $200 less. Anybody running one or have any input on how they compare?
 
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