"It fits a 212" is not a specification
The 212 is the most-cloned engine in this class. The name tells you displacement and almost nothing else — bore, keyway and exhaust flange all vary between production runs and between clones, which is why two builders with "the same engine" end up needing different parts. Every part below is selected by a measurement taken off the engine in front of you.
Engine-side worksheet
| Measure | Where | What you'll get | What it selects |
|---|---|---|---|
| Crankshaft bore | Output shaft, clutch removed. Calipers on the bare shaft. | 5/8" (16 mm) · 3/4" (19 mm) · 1" | 3/4" or 1" → 30 Series TAV2 converter 5/8" or 3/4" → 420 chain, clutch & sprocket kit |
| Chain pitch | Ten pins on the existing chain, centre to centre, ÷10. | 0.375" = #35 · 0.500" = #41 or #420 | Must be consistent from clutch or converter output all the way to the rear wheel |
| Frame clearance | Space outboard of the crank, engine mounted. | Varies — measure it | Whether a converter physically fits; it is much wider than a bare clutch |
| Frame tube diameter | Where a tank band would wrap. | ≈75 mm or ≈100 mm | Selects the 1.1 L or 2.355 L cylindrical gas tank |
Drivetrain — what bolts on once you have measured
| Part | The number that governs fit | Our part |
|---|---|---|
| Torque converter | Crankshaft bore — 3/4" or 1" | 30 Series TAV2, both bores, 669 belt, #420 and #35 sprockets |
| Chain & sprockets | Chain pitch — #35 or #420 | 420 kit — 10T clutch, 60T rear, 120 links |
| Exhaust | Flange pattern and frame clearance | Header pipe with muffler kit — side exit, heat wrap included |
| Fuel tank | Frame tube diameter — 75 mm or 100 mm band | Cylindrical gas tank, 1.1 L or 2.355 L |
Why "it fits a 212" is not a specification
The 212 is the most-cloned engine in this class, which means "212" tells you the displacement and almost nothing else. Bore, keyway and flange all vary between production runs and between clones. Every part above is chosen by a measurement taken off the engine in front of you — not by the engine's name. The measuring sequence is the same one that applies to any mini bike drivetrain: bore, then pitch, then tooth count.
On a specific machine
Wrong-part traps
- Assuming every 212 has the same crankshaft. Bore varies across production runs and clones. Measure it.
- Buying a converter before checking frame clearance. A converter is wider than a clutch, and 212 swaps are often already tight.
- Mixing pitches after a swap. If the converter's driven sprocket is #420, the rear sprocket has to be too.
- Reusing the stock chain length after fitting a converter. The output moves; the chain length changes with it.
- Ordering an exhaust off engine name alone. Flange pattern and available frame clearance both need checking.
FAQ
What torque converter fits a Predator 212?
A 30 Series TAV2 is the matching size class for a 212cc engine, running a 669 belt. Which kit you order depends on the crankshaft bore you measure — 3/4" or 1" — and on whether your chain is #35 or #420.
What chain does a Predator 212 build use?
The engine does not set the chain — the drivetrain does. Most 212 builds run #420 for its higher tensile strength, but what matters is that the clutch or converter sprocket, chain and rear sprocket all share one pitch.
Do I need to change the chain length after fitting a torque converter?
Usually yes. A converter's driven output sits in a different position than a bare clutch sprocket, so the chain run changes. Buy long and shorten to fit.
Will a Predator 212 exhaust fit any mini bike?
Fit depends on the exhaust flange pattern on the engine and on the clearance available in your frame, not on the engine name. Check both before ordering.
Parts that fit
Shop drivetrain parts 30 Series TAV2 torque converter — 3/4" or 1" bore
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