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Crankshaft Oil Seal for Honda GX390 Crankshaft Oil Seal for Honda GX390

Crankshaft oil seal fits Honda GX340, GX390, 420cc and 460cc engines.  Use this seal on both the PTO or Flywheel side.  Engine requires two per engine so order a quantity of two per engine.

Our Price: $5.00
ARP Side Cover Bolt for Honda GX390, 460cc ARP Side Cover Bolt for Honda GX390, 460cc

ARP crankcase side cover bolt fits Honda GX340, GX390, 420cc, and 460cc big block clone engines.  Order a total of 7 bolts for Honda GX340 and GX390.  Order a total of 10 bolts for 460cc big block clone engines.

Your Price $5.45
Dipstick for Honda GX390, 460cc Big Block Dipstick for Honda GX390, 460cc Big Block

Dipstick fits Honda GX240, GX270, GX340, GX390, GX440 and 460cc big block engines.

Our Price: $6.00
Oil Fill Plug for Honda GX390, 460cc Big Block Oil Fill Plug for Honda GX390, 460cc Big Block

Oil fill plug fits Honda GX240, GX270, GX340, GX390, 440cc and 460cc big block engine.

Our Price: $6.00
Solid Side Cover Dowel Pin Kit for Honda GX390 (Includes 2 dowels) Solid Side Cover Dowel Pin Kit for Honda GX390 (Includes 2 dowels)

Solid side cover dowel pin fits Honda GX390 engines.  Order two per engine.

Our Price: $8.00
Side Cover Gasket, 7 Bolt Side Cover Honda GX390, 420cc Big Block Side Cover Gasket, 7 Bolt Side Cover Honda GX390, 420cc Big Block

Honda GX390 side cover gasket.  Fits all 7 bolt GX390 engines and 7 bolt 420cc big block engines.

Our Price: $10.00
Main Bearing for Honda GX390, 420cc, 460cc Main Bearing for Honda GX390, 420cc, 460cc

Main bearing for Honda GX340, GX390, 420cc and 460cc engines.   Requires two per engine.  (These are sold individually one bearing).

Our Price: $12.00
Electric Starter Block Off Plate for Honda GX390, GX440 Electric Starter Block Off Plate for Honda GX390, GX440

Electric starter block off plate fits Honda GX340, GX390, and 460cc big block clone engines.

Our Price: $15.00
Copper Head Gasket, Honda GX390, 460cc, 500cc Big Block Copper Head Gasket, Honda GX390, 460cc, 500cc Big Block

Copper head gasket available in a variety of bore and thickness ranges for the big block Honda GX390, 460cc, 500cc engines.  Select the gasket below that fits your build:

Our Price: $18.00
Magnetic Oil Drain Plug, Honda GX390 Magnetic Oil Drain Plug, Honda GX390

Bullfrog Performance Products magnetic oil drain plug for Honda GX390 and big block clones.  Billet aluminum drain plug includes the copper gasket.  Our plug is a nice upgrade to catch any signs of engine trouble by catching the magnetic particles that may be in your engine oil.

Our Price: $19.00
Rod Bearing Set for Honda GX390 ARC Racing Rods Rod Bearing Set for Honda GX390 ARC Racing Rods

ARC Racing connecting rod bearing set for ARC Racing billet connecting rods part number 6272 and 6274 Honda GX390.

Our Price: $23.00
Rod Bearing Set for Bullfrog Performance Products GX390 Rod Rod Bearing Set for Bullfrog Performance Products GX390 Rod

Rod bearing set for our Bullfrog Performance Products GX390 billet connecting rod.

Your Price $24.95
Piston Ring Set, 90mm for Bullfrog Performance Products Forged Piston Piston Ring Set, 90mm for Bullfrog Performance Products Forged Piston

Piston ring set that fits our Bullfrog Performance Products 90mm diameter forged pistons with 1.100" compressrion height.

Our Price: $44.00
Engine Mounting Plate, Burris Racing GX390 Engine Mounting Plate, Burris Racing GX390

Burris Racing engine mounting plate fits Honda GX340, GX390 and Yamaha MX400 engines.

Our Price: $75.00
Billet Connecting Rod ARC Racing for Honda GX390 4.410" Billet Connecting Rod ARC Racing for Honda GX390 4.410"

ARC Racing billet connecting rod for Honda GX390 engines.  Includes rod bearings and rod bolts.

Our Price: $150.00
Billet Connecting Rod ARC Racing for Honda GX390 4.450" Billet Connecting Rod ARC Racing for Honda GX390 4.450"

ARC Racing billet connecting rod for the Honda GX390.  This rod is 4.450" center to center length and comes with rod bearings and rod bolts.

Our Price: $150.00
Bullfrog Torq-N-Rev Big Block Billet Connecting Rod GX390 4.450" Length Bullfrog Torq-N-Rev Big Block Billet Connecting Rod GX390 4.450" Length

Bullfrog Performance Products billet connecting rod fits Honda GX340, GX390, 420cc clone, 440cc clone and 460cc big block engines.  Our Torq-N-Rev billet connecting rod is CNC machined from 7075 T-6 billet aluminum and includes babbit rod bearing set and ARP rod bolts and washers. This billet rod is 4.450" center to center length.  Heavy duty rod cap and beam design for the most extreme engine setups.  Fits stock piston pin or aftermarket pistons with the standard piston pin diameter.

Our Price: $159.00
Bullfrog Torq-N-Rev Billet Connecting Rod, Honda GX390 4.650" +.200" Longer Than Stock Bullfrog Torq-N-Rev Billet Connecting Rod, Honda GX390 4.650" +.200" Longer Than Stock

Bullfrog Performance Products Torq-N-Rev billet connecting rod is manufactured from billet 7075 T-6 aluminum.  Our billet connecting rod includes rod bearings and setup with ARP rod bolts. Our billet rod is +.200" longer than stock length of 4.650" center to center length.  Works with our forged big block piston kits with .900" compression height.

Our Price: $159.00
Clutch, Bully Turbo 1" (less drive gear) Clutch, Bully Turbo 1" (less drive gear)

Bully Turbo 1" clutch for GX390, 460cc and V-Twin big block engines with 1" diameter output shaft.  This clutch sku doesn't include the drive gear as they are sold separately on our website.

Our Price: $424.00