TadaMark 212CC Torque Converter 30 Series — 3/4" Bore Kit for 2–7HP Engines, Adjustable Engagement

The TadaMark 212CC Torque Converter 30 Series is a complete 3/4" bore torque-converter kit designed to upgrade small engines (2–7HP) for go-karts, mini bikes, ATVs and light equipment with a reliable, adjustable engagement range.

This kit replaces or upgrades Comet TAV2 style torque converters and fits engines with a 3/4" straight crankshaft, including popular 212/224cc Predator, Coleman and similar small-engines. It combines a cast-iron/aluminum driver and driven pulley set, a pre-measured belt, two sprockets, mounting hardware and a plastic cover so you can quickly swap from a stock clutch to a centrifugal torque converter for smoother acceleration and more usable power across RPMs.

How does this torque converter improve acceleration and drivability?

The torque converter multiplies torque at low engine RPM, giving stronger launches and more controlled acceleration than a direct clutch in many small-vehicle applications. Its centrifugal driver and driven assembly adjusts engagement based on engine speed, so you get progressive engagement instead of a single-point snap.

• Engagement range around 2350 ±200 RPM (adjustable by springs and setup)
• Smoother starts for heavier loads or passenger rides
• Better low-end pulling power for hills and towing

What are the exact dimensions and compatibility details?

This 30-series converter features a 3/4" bore driver designed for straight crankshafts and a belt sized to the included pulleys. It works with many mini bikes, go-karts, small tractors and riding mowers that accept a 3/4" crank interface and the common 30-series spacing.

• Driver bore: 3/4" (0.75") compatible with straight crankshafts
• Drive belt length: 70.5 cm (27.76") and outside circumference ~27 23/64"
• Center-to-center pulley distance range: 6-15/16" to 7"
• Fits Predator 212/224cc, Coleman, Baja Warrior, Manco and similar

What comes in the package and what materials are used?

The kit is shipped as a ready-to-install set with both pulleys, an appropriately sized belt, two sprockets for common chain sizes, a mounting bracket and a hardware pack. Components use iron and aluminum for a balance of strength, heat dissipation and durability in everyday off-road and work use.

• Included: 1 drive belt, 1 x 3/4" driver pulley, 1 x 5/8" driven pulley
• Included: 10-tooth #40/41/420 sprocket and 12-tooth #35 sprocket (chains not included)
• Includes aluminum mounting bracket, plastic assembly cover and full mounting hardware (three screw kits)

How adjustable is engagement and what installation tips help avoid problems?

The default engagement is approximately 2350 RPM with a ±200 RPM window, but you can tune engagement between roughly 1200–3100 RPM by swapping springs and fine-tuning the clutch setup. Pay attention to belt orientation and supplied fasteners to prevent fitment issues.

• Engagement adjustable via springs (not included) and mechanical adjustments
• When installing, orient the belt so the arrow-marked end faces downward
• Three screw kits included; use alternate screw set if shaft thread type differs (metric vs non-metric)

Who is this for: This TadaMark torque converter kit is aimed at hobbyists, small-vehicle owners and DIY mechanics who want improved low-end torque and smoother acceleration on go-karts, mini bikes, ATVs, riding mowers or light tractors powered by 2–7HP engines with a 3/4" straight crankshaft. It’s suitable for users who can perform basic mechanical installation and want the option to tune engagement characteristics for performance or utility applications.