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439cc Engine - Go Kart Racing - Gx390 Gx420 Gx440 Clone - 18hp For Sale

439cc Engine - Go Kart Racing - Gx390 Gx420 Gx440 Clone - 18hp

These engines are made to our specifications and are the only 18-Horsepower Straight-shaft 439cc Honda GX390 "big block clones" available for purchase in the United States. Specifications:
-92mm Bore x 66mm Stroke
-8.75:1 Compression
-3 Angle Intake Valve Seat
-36mm Intake & 31mm Exhaust Valves
-38lb HD Valve Springs Factory Installed
-29 Degrees Timing BTDC (8-Degree Timing Key Included)
-Cam Specs : 220/212 .260/.240 110LSA
-Extra-thick Cylinder Head Deck (41cc Chamber) Can be milled over .150"<
-Uses all GX390 Parts (Billet Rods, Flywheels, Cams, etc) - Cam journal is NOT 0.008 oversize like most clones
-Lightweight 235gram Connecting Rod
-388gram Piston & Wrist Pin (-7cc Dish)
-Oil Sensor and Speed Governor have been removed and holes are plugged.
-Balance Shaft included
-1" Output Shaft w/1/4" Keyway
-All Engines are Test-Run before being shipped.
-This engine is ready to put on your Go Kart and go racing! These have a noticable edge over the similar 420 clones.
-Available in Recoil Start only!We also offer Cylinder Head porting & milling for more compression, Billet Rods & Flywheels, Rocker Arms, Stainless valvetrain, Performance Cams and much more...


Vegas Carts & Performance
2995 Coleman St
North Las Vegas, NV 89033
702-530-7753


439cc Engine - Go Kart Racing - Gx390 Gx420 Gx440 Clone - 18hp

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439cc Engine - Go Kart Racing - Gx390 Gx420 Gx440 Clone - 18hp:
$300




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