A torque converter is an automatic clutch system commonly used on minibikes and go-karts. At idle, the drive clutch is disengaged. As engine RPM rises, flyweights inside the drive clutch push outward, engaging the belt and transferring power to the driven clutch. The ratio changes as RPM increases, giving strong acceleration at low speeds and a higher final drive at top speed — similar to an automatic transmission.
The most popular torque converter for small engines is the Comet TAV2 (30 series), which fits engines from 2 to 8 HP and uses a 3/4 inch bore drive clutch. The Comet 40 series is designed for higher horsepower applications. Stall speed and engagement RPM can be adjusted by changing the spring rate inside the clutch.
The Comet TAV2 (30 series) has a drive ratio that varies from approximately 3.5:1 at engagement down to about 0.9:1 at top speed, acting like a continuously variable transmission (CVT).
Torque converters provide better low-end acceleration and hill climbing ability. Centrifugal clutches are simpler and cheaper but have a fixed drive ratio. For trail riding or hilly terrain, a torque converter is generally preferred.
Most stock Comet torque converters engage around 1,500-2,000 RPM. Stiffer springs raise engagement RPM for more aggressive performance.
Yes. The Comet TAV2 30 series is a direct fit for the Predator 212 and most Honda GX160/GX200 clone engines with a 3/4 inch crankshaft.
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