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.
Bronze Valve Guide, 6.5mm Honda GX390
Bullfrog Performance Products bronze valve guide set will fit the Honda GX340, GX390 and many other big block clone engines with factory diameter valve stem size of 6.5mm. Our bronze valve guide will outperform in longevity and performance over the factory steel guide. Has closer to the same heat expansion rate as aluminum head for a more stabil valvetrain operation. These are sold per valve guide so order two for replacing guides in head intake and exhaust!
Air Filter, Angled 4" Long x 2 7/16" ID
Small engine racing air filter for use in many applications including go karts, mini bikes and many other off road applications.
Aftermarket air filter for the Predator 212cc, Honda GX390, Clone engines when using our air filter adapters with 2 7/16" OD. This air filter is an aftermarket version of the K&N cotton gauze design. Be sure not to forget our air filter oils and cleaners to keep your air filter performing at its best.
Red Line Two Stroke Racing Oil
Red Line Oil’s popular two-stroke lubricants contain base oils which have the highest film strength and greatest affinity for hot metal. Because Red Line is a superior high temperature lubricant, it can be used at lower fuel to oil ratios, increasing power and providing excellent scuff protection and cleanliness. Where many two stroke oils are recommended to run at 32:1, many Red Line customers often mix their fuel at a leaner, 40:1. Red Line provides the lubricating qualities of castor oil, but provide exceptional cleanliness, with low carbon residue that dramatically reduces plug fouling and smoke. Red Line provides special protection for reformulated fuels. Dyno proven to make more power over longer periods of operating time.
*Two Stroke Racing Oil*
The ultimate in two-cycle performance - provides improved power and perfect cleanliness. Power improvements of 3-5% have been obtained in dyno tests. The high-temperature stability prevents deposits in even the hottest upper ring and piston crown areas. Suggested for use at 50:1, but can be used richer or leaner, up to 100:1 depending on the type of engine and its operating conditions. Provides unequalled protection in motorcycles and marine engines as a premix or injection oil.
Liqui Moly, Anti-Friction Engine Treatment
MoS2 Anti-Friction Engine Treatment ensures immediate friction and wear reduction, adds an extremely protective and pressure-resistant boundary layer with low friction and lubricates during cold starts to prevent damage from lack of oil. Contributes to lower fuel consumption, longer engine life and less noise. Specifically designed for older engine designs with or without a turbocharger.
Dual Valve Spring Kit for Honda GX390 65 lbs
Bad Ass Minis 65 lb. dual valve spring kit for the Honda GX390 big block single cylinder racing engines. We highly recommend our 65 lb. kit when using any cams with .300" lift and higher.
96mm Head Gasket for Big Block Engine (No Oil Feed Hole)
Bad Ass Minis performance head gasket specifically designed for Bad Ass Minis big bore 95mm cylinder blocks. This head gasket fits 96mm bore big blocks and is Made In USA!. This head gasket has a 96mm bore and is .043" thick and does not have the oil feed hole made into gasket.
Liqui Moly, Ceratec Engine Treatment
High-tech anti-wear additive, suitable for most 4-stroke engines as well as manual transmissions and compressors. Reduces friction and wear thanks to a unique combination of ceramic compounds and chemical anti-wear agents. It will prevent direct metal-to-metal contact and reduce friction to increase engine life and reduce fuel consumption in gasoline and diesel engines.
40mm Stainless Steel Intake Valve for Honda GX390, 460cc Big Block
Bad Ass Minis stainless steel intake valve fits Honda GX390, 460cc engines. We highly recommend this valve when using high lift aftermarket racing cams to prevent valvetrain failure.
Be sure to include our billet aluminum or titanium valve spring retainer kit with our valve.
33mm Stainless Steel Exhaust Valve for Honda GX390, 460cc Big Block
Bad Ass Minis stainless steel exhaust valve fits Honda GX390, 460cc engines. We highly recommend this valve when using high lift aftermarket racing cams to prevent valvetrain failure.
Be sure to include our billet aluminum or titanium valve spring retainer kit with our valve.
Crankshaft, 69mm Stroke GX390
69mm stroker crankshaft for big block 460cc engines. Can be used in Honda GX390, but you may have to mill your piston to fit the Honda GX390 block.
Billet Valve Cover, Honda GX390 Big Block w/Cooling Fins
Our billet valve cover for the big block engine features our unique integral cooling fins for additional valve spring chamber cooling. Our billet valve cover is the lightest cover on the market. You can throw away your stock valve cover gasket as our cover comes with an o-ring seal that promotes better clamping force and eliminates oil leaks. The other billet valve covers on the market do not have the machining time put into their valve cover to make them work as a bolt on piece. Our cover is taller than the factory valve cover so it will clear any roller rocker arm on the market. You will also receive our custom machined aluminum crankcase breather fittings.
Bullfrog Performance Products billet valve cover fits big block engines listed below:
- Honda GX240
- Honda GX270
- Honda GX340
- Honda GX390
- Powerhorse 414cc
- Vegas Carts 460cc
- LCT 414cc
Our big block billet valve cover will only fit the wedge style head and it will not fit the hemi heads on Predator 420cc.
