Performance Parts that will fit Predator 224 (Listed)

Harbor Freight has given us a new Engine to play with! But what are the rules? Mostly very similar to the Honda and Clone Engines. There is no part that is exclusively for this engine, everything you wish to upgrade is already available in the market.

Stage 1 Kit (Air Filter, Jet, Adapter & Exhaust)	Will take the same stage 1 kit as Predator 212 and clone engines	Stage 1 Kit
Carburetor	Any carb that fits Predator 212 will also fit the Predator 224	26mm Mikuni VM22 Clone, Original Mikuni VM22
Billet Connecting Rods	With an OEM Piston & crank you’ll need to find a Rod with: Wrist Pin – .716” Crank Pin – 1.181″ Center to Center – 3.303″	ARC 6773
Flat Top Piston	Diameter – 70 mm Wristpin Diameter – 0.708″ Note: This Piston won’t fit the OEM connecting Rod, will require a rod with a 0.708″ wrist pin	Wildcat 223 Flat Top Piston
Billet Rod for Flat Top Piston	Wrist Pin – .708” Crank Pin – 1.181″ Center to Center – 3.303″ to 3.323″	ARC 6271 or EC 8281 (will require clearancing)
Billet Flywheel	Same as the ones used in Honda and Honda Clones	ARC 6619
Camshaft	Same as the ones used in Honda and Honda Clones	Dyno Cams
Valves	Intake: 27mm Exhaust: 25mm Stem Size: 5.5 mm	27mm Intake SS Valve, 25mm Exhaust SS Valve
Valve Spring	Up to 26 lb spring can be used without additional machining work	18lb, 22lb, 26lb
Ratio Rockers	Will take the same ratio rockers as the Predator 212 Non-Hemi and Clone Engines	1.3 Stamped Rocker Arm from ECCarbs

Governor Removal

It uses the same mechanical governor as the Predator 212 but instead of 3600 rpm, this governor limits the rpm to 3750. It is placed in the same region inside the engine as the 212cc Predator. The removal process is also the same, you can expect to touch 5000 to 5500 rpm with the removed governor before the valve floats.

Stage 1 Kit

Carburetor

Connecting Rod & Piston

You have a few options here, you can either get a flat top piston and +0.020″ rod or get a standard size rod with the OEM piston. Keep note of the wrist pin size and pin size (stated in the table) before ordering the parts.

0.030″ Clearance should be maintained at all times, choose the rod length accordingly, otherwise some machining work will be needed on the piston.

Valves and Valve Spring

It will use the same valves as the honda/clone engines. If you’re experienced with valve seat cutting, you can upgrade to bigger valves.

The stiffest valve spring it can take is the 26 lb. Some work will be required to fit in the 36lb or dual spring valves.

Other Parts

Almost every other parts including Camshaft, billet Flywheel, and ratio rockers are the same ones used on Honda and its Clones.

The only thing worth mentioning is that the OEM camshaft is made of plastic, it will be able to withstand the higher RPM builds but if you’ve got doubts, that might be the first thing to replace (if you already have an older Predator 212 or clone, you can swap the cams).

If you’re new to Engine building and want to know about what each of these upgraded parts will do to the engine then you can check our Predator 212 mods guide.