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This is a bolt-on Stage 1 kit for the 212cc Hemi Predator engine, the engine found on many go-karts, mini bikes and pressure washers. It bundles an open air filter and adapter, a choke bracket, a matched jet, upgraded 18 or 22 lb valve springs, a valve cover gasket, an offset timing key, and a choice of small fan or aluminum flywheel, with an optional header. The combination of more airflow, more fuel and a timing advance is the standard recipe for waking up a stock 212, and the kit claims roughly 10+ horsepower. It suits owners who can turn wrenches and want a proven parts package rather than piecing it together. The main trade-off is that it is not a complete build: no head gasket, no oil for the filter, and the stock flywheel is called out as a failure risk, so the flywheel choice matters.
In stock
Owners of 212 Hemi Predators treat Stage 1 kits like this as the standard first upgrade and report a clear seat-of-the-pants gain in power and response. The recurring complaints are about fitment details and the parts that are not in the box.
This Stage 1 hop up kit is a basic performance upgrade for 212 Hemi Predator engines. It is simple to install and is rated at approximately 10+ HP of added power.
The kit includes a race/open air filter with adapter, a choke bracket, a jet matched to the application, upgraded valve springs, a valve cover gasket and an offset timing key. You choose either a small fan or an aluminum flywheel. A header/exhaust is optional.
Manufacturers sometimes use different jets on the same models, so the stock jet size should be known before ordering. The filter should be sprayed with K&N-type oil, especially in dirt applications. Oil is not included. The header or pipe should be supported with a bracket or brace to the frame or engine, or it may fracture or break.
