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79cc Parts

 

High Flow Air Filter Element
Code: 1502
Price: $8.00
Available for delivery
Quantity in Basket: none
This high flow air filter fits in the stock air filter box. UNI makes the highest quality air filters that flow many times better than stock air filters. With this additional air entering the combustion chamber you will need to add more fuel as well. Drilling the stock main jet is required. A larger air/fuel charge entering the combustion chamber equals more power.

Air Filter Adapter, 79cc & 99cc
Code: 2314
Price: $10.00
Available for delivery
Quantity in Basket: none
This adapter allows you to install an aftermarket air filter on your 79cc Greyhound or 99cc Predator carb. Requires air filter with 2 1/8" or 54mm ID. Made from aluminum.

High Flow Air Filter
Code: CE4255
Price: $16.00
Available for delivery
Quantity in Basket: none
High flow air filter with 54mm ID (2 1/8"). Use with our air filter adapter (2314) for 79cc & 99cc carbs. Total length is 3 1/4" long.

UNI Breather Filter
Code: 1506
Price: $15.50
Available for delivery
Quantity in Basket: none
This breather filter fits the 49cc, 79cc & 99cc 4 stroke motors. Use when the stock air filter box has been removed. The UNI filter plugs into the breather tube that normally goes into the stock air filter box.

Throttle Linkage Kit for 79cc/99cc
Code: 2900
Price: $12.00
Sorry, we are currently sold out of 'Throttle Linkage Kit for 79cc/99cc'. Please check back later.
Quantity in Basket: none
Throttle linkage kit works on the 79cc Harbor Freight engine and the 99cc Harbor Freight Predator. Comes with two brackets, conduit retainer, throttle rod, return spring and wire stop. Use with stock carburetor. Easy installation. Use kit 2904 if you are keeping the stock fuel tank on top of the engine. Disregard the throttle rod we supply if you are keeping the govenor in the engine.

Throttle Linkage Kit, 79/99, II
Code: 2904
Price: $12.00
Sorry, we are currently sold out of 'Throttle Linkage Kit, 79/99, II'. Please check back later.
Quantity in Basket: none
This throttle linkage kit can be used on the 79cc & 99cc Predator engines. We relocated some of the parts in kit 2900 to come up with this kit so it can be used with the stock fuel tank. If you are keeping the govenor in your engine disregard the throttle rod we supply with the kit.

Carb, Bored & Reworked, 79cc/99cc
Code: 2806
Price: $45.00
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Quantity in Basket: none
This is a stock carburetor that has been bored and reworked. Carb now has a .487" bore (stock is .428"). Circuitry has been reworked and butterfly and shaft have been modified. Shipped with a #82 main jet. Direct replacement for stock carb.

Main Jet for 79cc/99cc Predator
Code: 2740*
Price: $5.00
Available for delivery
Quantity in Basket: none
These main jets fit the 99cc Predator carburetors. Also fit some of the 79cc Predator carburetors. You must measure your stock jet. If the threads are .194"/4.9mm these jets will work. If the threads are .154"/3.9mm you need p/n 2742. Choose from the following sizes: 60, 62, 65, 68, 70, 72, 75, 78, 80, 82, 85, 88 & 90. After installing a high flow air filter we are using a #80. We use an #82 in our reworked carburetor.

Carburetor, 19mm
Code: 1812
Price: $26.00
Available for delivery
Quantity in Basket: none
This 19mm slide carburetor is excellent for 79/99cc Predator engines. Carburetor manifold required (2322). Use our air filter (1412).

Main Jet for 19mm Carb & 79cc Carb
Code: 2742*
Price: $5.00
Available for delivery
Quantity in Basket: none
These main jets fit our 19mm carburetor (1812). Also fit the 79cc Greyhound carburetor. Also fit some of the 79cc Predator carburetors. You must measure your stock jet. If the threads are .194"/4.9mm you need p/n 2740. If the threads are .154"/3.9mm these jets will work. Choose from the following sizes: 70, 75, 80, 85 & 90.

Air Filter, K&N Style, 1 1/4"
Code: 1412
Price: $10.50
Available for delivery
Quantity in Basket: none
This air filter fits our 19mm carb. ID is 1 1/4". Filter is 2" tall.

Manifold for 19mm Carburetor
Code: 2322
Price: $35.00
Sorry, we are currently sold out of 'Manifold for 19mm Carburetor'. Please check back later.
Quantity in Basket: none
This manifold adapts our 19mm carb to a 79cc or 99cc Predator. Solid construction with a curved shape to position the carb flush with the recoil starter and behind the valve cover. The length and shape of this manifold is great for increased low to mid range power. Great setup for the 79cc/99cc looking for more power!

Manifold Kit
Code: 2324
Price: $21.00
Available for delivery
Quantity in Basket: none
Build your own manifold using this kit. The kit includes a flange for the cylinder head side, a flange for the 19mm carb and a piece of 1" OD bent tubing. If you cannot use our manifold (2322) because your engine is not mounted flat this kit is a great alternative.

99cc Cylinder Head, Ported & Milled
Code: 2826
Price: $96.00
Available for delivery
Quantity in Basket: none
The factory castings have rough edges from the machining process which limits the cylinder heads power potential. This 99cc Predator cylinder head has been ported to improve performance. We also mill these cylinder heads to increase compression. The added compression will improve your engines performance throughout the rpm range. This cylinder head also fits the 79cc Predator. Verify adequate valve to piston clearance before running your engine with this cylinder head.

Cam, Custom Ground, .224" lift, 79/99cc Predator
Code: 1184
Price: $119.00
Available for delivery
Quantity in Basket: none
Custom ground cam for the 79/99cc Predator engines. This cam has .224" lift and 219* duration on the intake lobe and .231" lift and 222* duration on the exhaust lobe. The stock cam has .170" lift. Harbor Freight no longer sells parts for the 79/99cc Predator engines. You must send us your stock cam to buy this cam so we have a core to regrind.

Jackshaft Assembly for 79cc HF & 99cc Predator
Code: 2600
Price: $135.00
Available for delivery
Quantity in Basket: none
This jackshaft assembly is a great way to get the gear reduction you need. Use with our Max Torque clutch. Jackshaft has a 22t input sprocket and a 9t output sprocket. We use this with a 56t sprocket on the rear wheel for total reduction of 12.44:1. Use #35 chain from the clutch to the input sprocket (included). Use #41 chain on the output sprocket which also works with the standard wheel sprockets that use #415 chain. Backing plate is slotted to adjust slack in the chain. Clutch not included.

Max Torque Clutch
Code: 2400
Price: $39.00
Available for delivery
Quantity in Basket: none
This clutch was specifically designed to work on the 79cc & 99cc engines with our jackshaft setup. Clutch has an 11 tooth sprocket setup for #35 chain. The shoes and spring have been modified for better engagement compared to standard Max Torque clutches. Clutch engages at 2700 rpm. 100% better than clutches we've dealt with on skyhawk and 4g kits.

Max Torque Clutch, High Stall
Code: 2404
Price: $39.00
Available for delivery
Quantity in Basket: none
This clutches has been modified for a higher rpm engagement. Clutch engages at 3100 rpm which provides for a smoother take off on motorized bicycles. 5/8" bore and 11 tooth for #35 chain. Your govenor must be removed to use this clutch.

Draggin Skin Clutch, 5/8" Bore
Code: 2406
Price: $150.00
Available for delivery
Quantity in Basket: none
The Draggin Skin is a high quality clutch. Comes with 4 sets of springs and 3 sets of weights allowing engagement settings from 2850rpm to 3800rpm. The clutch comes with a matted steel stamping shoe which provides less chatter and vibration upon engagement than you would experience with a typical shoe clutch. Comes with an 11 tooth sprocket for #35 chain.

Output Shaft Bolt Kit
Code: 1750
Price: $4.00
Available for delivery
Quantity in Basket: none
Output shaft bolt for the blue 79cc Harbor Freight engine. Also works with the 97cc Lifan flat head. Does not fit the 79cc Predator. Retains clutch on the output shaft. When using our jackshaft assembly the clutch is spaced out to clear the jackshaft plate. The spacer included in this kit helps retain the clutch key so it cannot work its way off the output shaft.

Output Shaft Bolt Kit, Predator
Code: 1754
Price: $4.00
Available for delivery
Quantity in Basket: none
Output shaft bolt for the 79cc & 99cc Predator engine. Does not fit the blue 79cc Greyhound engine. Retains clutch on the output shaft. When using our jackshaft assembly the clutch is spaced out to clear the jackshaft plate. The spacer included in this kit helps retain the clutch key so it cannot work its way off the output shaft.

Motor Plate for 79cc &99cc HF Engines
Code: 2306
Price: $25.00
Available for delivery
Quantity in Basket: none
This motor plate replaces the standard 4 stroke motor plate. Use with the two frame mounts from the 4 stroke motor mount (not included). The 79cc & 99cc HF engines bolt directly to this plate. Holes are slotted for side to side adjustment and front to back adjustment. Can use optional engine sprocket (AGKZ21-9 tooth or 11 tooth) to adjust gear ratio. Can also use optional input sprocket (0521-29 tooth or 36 tooth).

Header Flange for HF Engines
Code: 2308
Price: $8.50
Available for delivery
Quantity in Basket: none
Build a custom header using our header flange. The flange has a 1" ID to be used with 1" header tubing. The stock exhaust flange has a much smaller ID which chokes the engine down and limits rpm. Building your exhaust with our flange and 1" header tubing creates a free flowing exhaust. Flange fits the 79cc HF & 99cc Predator.

Header Tube, DIY, Straight
Code: AGK661
Price: $14.50
Sorry, we are currently sold out of 'Header Tube, DIY, Straight'. Please check back later.
Quantity in Basket: none
Build your own header with our bent header tube. Tubing is 19" in length, 1" OD and 1/16" wall thickness. Tubing has a 90* bend just like AGK's straight headers.

Header Tube, DIY, Candy Cane
Code: AGK681
Price: $14.50
Sorry, we are currently sold out of 'Header Tube, DIY, Candy Cane'. Please check back later.
Quantity in Basket: none
Build your own header with our bent header tube. Tubing is 19" in length, 1" OD and 1/16" wall thickness. Tubing has a candy cane bend just like AGK's candy cane headers.

Muffler, Universal
Code: AGK688
Price: $10.50
Available for delivery
Quantity in Basket: none
Universal muffler works great for stock and mild motors. This muffler is much quieter than the RLV silencers we sell. 3/4" threaded pipe end. Welding or some other method is required to install. Canister is 5" long (6 1/4" including threaded end) and 2" in diameter. Good flow, low price and great performance.

Header, Short, fits 79cc/99cc
Code: 2506
Price: $44.00
Sorry, we are currently sold out of 'Header, Short, fits 79cc/99cc'. Please check back later.
Quantity in Basket: none
The stock exhaust has these engines choked down. We use laser cut flanges and 1" tubing to create a high flow header. The can muffler provides high flow as well while maintaining a reasonable exhaust note. This header should be braced to prevent breakage from heat and vibration.

Header, Long, fits 79cc/99cc
Code: 2508
Price: $57.00
Available for delivery
Quantity in Basket: none
The stock exhaust has these engines choked down. We use laser cut flanges and 1" tubing to create a high flow header. The can muffler provides high flow as well while maintaining a reasonable exhaust note. This header should be braced to prevent breakage from heat and vibration.

Header Brace
Code: AGK770
Price: $5.50
Available for delivery
Quantity in Basket: none
Headers are subject to tremendous heat and a lot of vibration. This header brace kit will help prolong the life of your header under these conditions. The 6.5hp engines have a drilled and tapped hole on the side of the cylinder head. This is a perfect place to mount the brace with the provided bolt/washer. Use the hose clamp to secure the brace to the header.

Valve Cover Gasket, 79cc, 2.5hp
Code: 2800
Price: $2.00
Available for delivery
Quantity in Basket: none
This valve cover gasket fits the 79cc HF engine.

Gasket, Intake, Insulator to Cylinder Head
Code: 2802
Price: $2.00
Available for delivery
Quantity in Basket: none
Intake gasket fits 79cc HF and 99cc Predator engines. This gasket goes between the black plastic insulator and cylinder head.

Gasket, Intake, Carb to Insulator
Code: 2804
Price: $2.00
Available for delivery
Quantity in Basket: none
Intake gasket for the 79cc HF & 99cc Predator engines. Gasket fits between the carburetor and black plastic insulator.

Gasket, Intake, Carb to Air Filter Box
Code: 2808
Price: $2.00
Available for delivery
Quantity in Basket: none
Gasket fits 79cc HF & 99cc Predator engines. Goes between the carburetor and air filter box.

Gasket, Exhaust
Code: 2820
Price: $2.50
Sorry, we are currently sold out of 'Gasket, Exhaust'. Please check back later.
Quantity in Basket: none
This exhaust gasket fits the 79cc HF and 99cc Predator engines.

Gasket, Cylinder Head, 79cc
Code: 2810
Price: $6.00
Available for delivery
Quantity in Basket: none
Replacement cylinder head gasket for the 79cc HF engine. Use as a high compression gasket for the 99cc Predator. The stock 99cc cylinder head gasket is .040" thick this gasket is .010" thick which will increase compression. When used on the 99cc Predator check piston pop up first. If the piston is out of the hole more than the thickness of this gasket, the piston will make contact with the cylinder head...not good. The piston height varies in these engines so it would be wise to check your piston depth before installing this gasket.

Gasket, Side Cover
Code: 2812
Price: $4.00
Available for delivery
Quantity in Basket: none
Side cover gasket fits the 79cc HF & 99cc Predator engines.

Gasket Kit, 79cc
Code: 2818
Price: $15.00
Sorry, we are currently sold out of 'Gasket Kit, 79cc'. Please check back later.
Quantity in Basket: none
This gasket kit fits the 79cc HF engine. The head gasket in this kit is for the 79cc Greyhound engine. The Predator engines use a thicker head gasket.

Recoil Starter, 79cc
Code: 2816
Price: $18.00
Sorry, we are currently sold out of 'Recoil Starter, 79cc'. Please check back later.
Quantity in Basket: none
Recoil starter fits the 79cc HF engine.

Modified 79cc Predator Engine, Stage 2
Code: T1094
Price: $755.50
Available for delivery
Quantity in Basket: none
This Custom Built 79cc Predator engine has the following modifications.
  • custom performance ground camshaft
  • professionally ported cylinder head & milled for increased compression
  • HP valve springs for high rpm
  • billet flywheel with adjustable timing
  • breather filter
  • 19mm carb
  • custom curved manifold
  • high flow air filter
Engine does not come with exhaust, throttle cable or clutch. Our race proven engines are the result of many hours of R&D. This modified 79cc Predator is great for mini bikes, motorized bicycles, go karts and many other applications.