Our club moved to 70t motor simply because 8-10 minutes Main was causing issues with sports, sports 2 series cars. 70t is the next slowest motor that runs a lot cooler than the Kyosho Stock motor. You can check out the Washington DC gtg sub form for our stock class rules. They have a proven success in a club and retail store after many years of fine tuning. You can take or leave the motor change. Just suggesting... find what works best for your group with least investment necessary.
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