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Engine, Racing, 420cc Big Block, Package 2
Engine, Racing, 420cc Big Block, Package 2


 
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Our Price: $1,248.00

Stock Status:(Out of Stock)

Part #: ENG-RAC-420-PACK2

Select Engine Type

420cc Hemi Predator
420cc OHV [+$21]
Select Carburator

GX390 Bored - Gas
Crankshaft Type/Options

Stock Crankshaft
69mm Stroker Crank, Cast (440cc) [+$128]
Add Fuel Tank & Pump Options

None

Qty:
Description -
 
High Performance 420cc Engine - Great for Kart Racing and Mini Bikes!
With almost 30hp, this engine will pull hard from 2500 to over 6000rpm. Ready to race or just have fun!

Includes:
  • 420cc Race-Prepped Assembly
  • Electric Start
  • Open Element K&N Style Air Filter
  • Removal of governor
  • HD Valve Springs
  • Billet Flywheel
  • Ported & Milled Head
  • 3 Angle Valve Job
  • Choice of Bored 24mm Stock Appearing or 34mm Mikuni carb
  • Reinforced Rocker Arms (Non-Hemi Only)
  • Flat Top Piston
  • 260 Lift Cam
  • Billet Rod +.040 Longer
  • Dyno Tested
*Note: Unless stated, engines do not come with tank, muffler/exhaust, or linkage. Filter should be sprayed with K&N type oil, especially in dirt applications. Oil not included - click here. Picture is for reference only. Color/style may vary. Engines are built to order and take approximately 2 to 3 weeks to ship, depending on the season.

*We offer $10 off shipping costs for each engine if purchasing 3 or more. If shipping cost exceeds $130 in shopping cart, contact us for alternative freight methods. We can typically ship a pallet of engines for $130-$200, depending on delivery location.

WARNING: TO PREVENT SERIOUS INJURY, AN ALUMINUM FLYWHEEL SHOULD BE USED ON ALL MODIFIED MOTORS. MOTORS SOLD FOR ORGANIZED COMPETITION PURPOSES OR EXPORT ONLY. (NOT FOR USE ON ANY EQUIPMENT, OFF-ROAD, RECREATIONAL, OR EMISSIONS CONTROLLED APPLICATIONS. DOING SO IS A VIOLATION OF FEDERAL LAW).

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 1 Write a review »

  0 of 0 people found the following review helpful:
 
5 of 5 Perfect Engine For My Gold Dredge May 9, 2023
Reviewer: Dean W from Cayuga WI  
I needed an engine durable enough to handle the continuous load of running a high volume water pump on my gold dredge.  This engine has lasted 2 seasons so far running many hours day for over a month the last 2 summers.  All I do each year is change the oil (AMSOIL 10W-50 Small Engine Oil), change the plug (Brisk USA D12S Silver Racing), and adjust the valve lash.  Uses about 2 tablespoons of oil every 10 hours of running but that’s expected with the performance upgrades of this engine.  Overall this is the perfect engine to drive the water pump on the gold dredge.  Couldn’t be happier.

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