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.
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.
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
Sale Price: $12.00
Head Gasket GX390 MLS
Multi Layer Steel head gasket that fits the Honda GX390 engine. Gasket has 89mm bore to fit the stock bore size on the 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.
Engine Mount, 460cc Big Block
Bullfrog Performance Products big block engine mount plate will fit 460cc engine base plate dimensions that are longer than the Honda GX390. Machined from billet aluminum and ready to bolt to a Burris Racing BMC541 or BMC542 chassis mounts and many other Burris Racing kart chassis mounts.
THIS MOUNTING PLATE WILL ONLY FIT THE 460cc VEGAS CARTS STYLE ENGINE!
Our Price: $65.00
Sale Price: $38.00
Crankcase Cover Gasket and ARP Bolt Kit Honda GX340, GX390
Crankcase cover gasket and ARP side cover bolt fastener kit for the Honda GX340 and GX390 side cover. Changing out a cam or making internal repairs or just plain building a new engine from scratch then you will need our kit to get maximum seal and clamp load your side cover needs to hold the bottom end together.
Cylinder Block, 460cc 10 Bolt 92mm Bore
Bullfrog Performance Products 92mm 460cc cylinder block. Our block features a 10 bolt side cover and a tall deck to allow for even more stroke without the piston popping up above the deck. Our cylinder block accepts all Honda GX390 internals, including camshaft, lifters and cranks seals.
Billet Crankshaft, Big Block Honda GX390, +.200 Stroker
New from ARC Racing is a billet crankshaft for the big block clone 460cc or Honda GX390 engine. This billet crankshaft has +.200" more stroke than the Honda GX390 factory crankshaft. Crank stroke is 69mm. If using this crankshaft in the Honda GX390 block you will need to mill the top of your piston to achieve the correct deck height.
500cc Big Block Racing Engine, Longblock
Bullfrog Performance Products is the first in the industry to offer a 500cc big block racing engine package. We are always innovating and bringing new engine packages to the small engine performance enthusiast. Our 500cc longblock is custom built and comes with the following high quality components:
- Bullfrog Performance Products custom Big Bore tall deck cylinder block for stroker crank applications
- Bullfrog Performance Products custom forged piston and low drag ring kit
- Head Dowels
- Side Cover 10-Bolt
- ARP side cover bolt kit
- Solid side cover dowel pins
- Dipstick and oil fill cap
- Cranksaft oil seals made from Viton material for higher operating temperatures
- Roller main bearings
- Custom stroker crankshaft
- Bullfrog Performance Products billet connecting rod kit
- ARP rod bolts
- Babbit Rod Bearings
- Victor Reinz big bore fire ring style head gasket
- Bullfrog Performance Products custom head package
- GX390 aftermarket cylinder head
- Big valve package
- Custom multi-angle valve job
- Ported, polished and flow tested head
- Dual valve spring package
- Billet valve spring retainer kit
- Chrome moly pushrod kit
- Roller rocker arm package
- ARP head bolt kit
- Performance cam and lifter kit
- Billet valve cover with integral cooling fins
- Engine is a longblock