Predator 79cc Modifications
Sorted from most common entry-level upgrades to full internal builds.
The stock jet is tuned conservatively for emissions, and it's the first thing that goes wrong once you change anything else — an air filter, an exhaust, even altitude. Re-jetting to match your actual setup is the cheapest, highest-return mod on this engine, and nearly every other mod on this page requires a re-jet anyway.
The stock governor caps this engine at roughly 3,600 RPM. Removing it is well documented in the mini-bike community, but the 79cc has no oil pump — the rod bearing relies on splash/dipper lubrication. Sustained high RPM without stiffer valve springs and disciplined throttle habits is a documented way to damage the bearing, not just the flywheel.
The tiny stock carb becomes the bottleneck once you've re-jetted, filtered, and freed up the exhaust. The common step-up on this platform is a 19mm slide-style carb with a matching intake manifold — budget for a throttle-linkage kit too, since the stock cable geometry won't match a different carb body.
The stock muffler is built for noise compliance, not flow. A header or performance muffler reduces backpressure and helps the engine breathe out as well as in — pair it with a re-jet, since a freer-flowing exhaust will run lean on the stock jet.
Predator 79cc vs 212cc
Not scaled versions of the same engine — here's what actually differs, and which one fits your build.
- Displacement79cc
- Stock HP3 HP @ 3,600 RPM
- Shaft Diameter5/8" (16mm)
- Typical UseMini bikes, kid karts, utility
- Aftermarket DepthSmall — mini-bike community
- Displacement212cc
- Stock HP6.5 HP @ 3,600 RPM
- Shaft Diameter3/4" (19mm)
- Typical UseGo-karts, mini bikes, racing
- Aftermarket DepthMassive — full clone-racing scene
Choosing Your Build
Match your modifications to your goal — more mods isn't always better without supporting parts.
- Re-jet carburetor
- High-flow air filter
- Performance exhaust
- Valve lash adjustment
- Mild build +
- Governor removal
- Billet flywheel
- Stiffer valve springs
- 19mm carb upgrade
- Stage 2 +
- Custom-ground camshaft
- Ported & milled head
- Compression bump
- Matched valve train