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PREDATOR 420 Parts
VIEW PREDATOR 420
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You can buy the Predator Engine on this page
The parts shown below all fit the Predator
Predator 420 Engine 13 HP (420cc) OHV Horizontal Shaft Gas Engine
Predator 420 PARTS
Many bolt-on upgrades can be added to bump up this engine to an amazing hp. All the parts and info you will need can be found on this page. These upgrades will help you unleash the power of your engine. close course competition only. not for road use
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Item No: NR-VELSTACK-390
shown for reference only: $30.99
Designed for the GX340/390 stock Carburetor. Can be used with or without an Air Filter. Accepts Choke Bracket Holder (not included)
Will work on GX270s, GX390s, and 13/15hp Chinese OHVs.
Will also work on GX200s & 6.5 Chinese OHVs using GX390 style
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Item No: NR-420PISTONKIT-HEMI-TO
shown for reference only: $31.95
90mm Aftermarket Flat-top Piston 420cc Predators. Will fit most 390 style engines.
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Item No: NR-390-BLUESTRIPE-PAIR
shown for reference only: $36.99
Spring, Valve, Heavy Duty, set (Fits 240, 270, 340, & 390s). Approx 50 lbs at 1.125 installed height, 42lbs at 1.2, with 110 lb open pressure (.375 lift)
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Item No: NR-390-DUAL-PAIR
shown for reference only: $36.99
Spring, Valve, Heavy Duty, set (Fits 240, 270, 340, & 390s). Approx 65 lbs at 1.125 installed height, 42lbs at 1.2, with 110 lb open pressure (.375 lift)
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Item No: NR-420PISTONKIT
shown for reference only: $39.95
90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi).
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Item No: NR-AIRFILTERKIT-390
shown for reference only: $39.95
Race Air Filter Kit, Velocity Stack Style - GX270, GX390, 13/15hp & 420/460cc OHV
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Item No: NR-390TRACTORPIPE
shown for reference only: $63.67
Header Pipe, fits Honda GX270, GX390, & 420cc Predator
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Item No: NR-24BOREDCARB
shown for reference only: $74.25
These 24mm bored carburetors come with a 3rd Circuit to tune Intermediate range performance and provide your GX390/Clone engine with the extra air & fuel it needs in a Mini-bike or Go-Kart application. Note: These aftermarket Carbs (not genuine Hondas)
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Item No:
shown for reference only: $129.95
Basic kit for improving the performance of GX390s, 420 Predators, 13/15 hp Chinese OHVs. Simple to install, you can expect significant performance increases.
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Item No:
shown for reference only: $144.95
306 SERIES - Race cam with awesome mid-range power. Serious race cam with awesome mid-range power camshaft for serious motors. Lobe designed esp. for Honda 270 - 390 Motors. Approx .306 lift and 240 duration (at .050).
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Item No: NR-390CAM-307
shown for reference only: $144.95
307 SERIES camshaft for serious motors and big tracks. Approx .307 lift and 260 duration. This cam was 6 month in development. Special Ramp Designed for running 12 to 1 or higher compressions using Race Gas or Methanol. Use with Dual springs and 1.3 rocke
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Item No: NR-STAGE1KIT270
shown for reference only: $159.00
Basic Stage 1 Kit for improving the performance of Honda GX270 & 270/301cc OHVs. Simple to install, you can expect significant performance increases.
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Item No: 6623
shown for reference only: $185.00
Flywheel, Billet, GX390 & 420 Predators, Recoil Start
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Item No: 6059
shown for reference only: $219.95
Billet Sidecover for GX390/420
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Item No: NR-STAGE2KIT270
shown for reference only: $249.95
Step up from the Stage 1, this kit is designed to further improve the power for the GX240s and GX270s by adding a larger carb and cam.
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Item No:
shown for reference only: $399.95
As step up from the Stage 2, this kit is designed to improve the power for the GX340s and GX390s along with improving the durability.
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