HONDA GX PARTS
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HOW TO UPGRADE
Honda GX200, Titan or Predator up
to 26hp...
Many modifications can be performed on your Titan or other engines including
Honda, Predator and more, for little or no cost. All the parts and info
you will need can be found on this page. Whether you are a recreational
user or want to race, these upgrades will help you unleash the power of
your engine
Item No: NR-390-BLUESTRIPE-PAIR
shown for reference only: $36.99
Spring, Valve, Heavy Duty, set (Fits 240, 270, 340, & 390s). Approx 50 lbs at 1.125 installed height, 42lbs at 1.2, with 110 lb open pressure (.375 lift)
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Item No: NR-390-DUAL-PAIR
shown for reference only: $36.99
Spring, Valve, Heavy Duty, set (Fits 240, 270, 340, & 390s). Approx 65 lbs at 1.125 installed height, 42lbs at 1.2, with 110 lb open pressure (.375 lift)
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Item No: NR-420PISTONKIT
shown for reference only: $39.95
90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi).
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Item No: NR-AIRFILTERKIT-390
shown for reference only: $39.95
Race Air Filter Kit, Velocity Stack Style - GX270, GX390, 13/15hp & 420/460cc OHV
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Item No: 6270
shown for reference only: $71.94
ARC Billet Rod for the GX 200 or 196cc Clone.
It is one of our Pro Series Rods, featuring ARC's trademark forced oil dipper.
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Item No: NR-24BOREDCARB
shown for reference only: $74.25
These 24mm bored carburetors come with a 3rd Circuit to tune Intermediate range performance and provide your GX390/Clone engine with the extra air & fuel it needs in a Mini-bike or Go-Kart application. Note: These aftermarket Carbs (not genuine Hondas)
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Item No: 6282
shown for reference only: $77.94
Billet Connecting Rod 3.484" Tecumseh OHH50 5.5 OHV Stock Length with solid dipper. 3.484" center to center with a 1.0023" crank pin bore and a .5637" wrist pin bore.
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Item No: DJ-1104
shown for reference only: $96.90
Dyno F275 welded lobe cam is designed to fit 5.5 and 6.5hp engines Honda, Titan, and predator. Excellent cam when running stock style carburetor. It will require an upgraded spring train package, billet rod, and billet flywheel. Target (MAX) RPM:8200-8400
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Item No: DJ-1112
shown for reference only: $96.90
The Dyno .308 cam is easy on the valve train and has a very wide power band. This cam requires an upgraded spring package, billet rod, and billet flywheel. Designed to fit 5.5 and 6.5hp engines Honda, Titan, and predator. Target (MAX) RPM: 8200-8400
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Item No: G-6689
shown for reference only: $122.35
SFI certified billet aluminum flywheel for Honda GX160, GX200, Titan TX200. The keyway is fixed in. the stock position and the stock pull starter can be used. Weighs 3.5lbs and incorporates a special low drag fan design. MADE-IN-USA
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Item No:
shown for reference only: $129.95
Basic kit for improving the performance of GX390s, 420 Predators, 13/15 hp Chinese OHVs. Simple to install, you can expect significant performance increases.
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Item No: 6057
shown for reference only: $139.98
Billet Sidecover for GX200/Clone/Predator Hemi
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Item No: 6058
shown for reference only: $139.98
Billet Sidecover for Predator 212 (non-hemi)
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Item No:
shown for reference only: $144.95
306 SERIES - Race cam with awesome mid-range power. Serious race cam with awesome mid-range power camshaft for serious motors. Lobe designed esp. for Honda 270 - 390 Motors. Approx .306 lift and 240 duration (at .050).
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Item No: NR-390CAM-307
shown for reference only: $144.95
307 SERIES camshaft for serious motors and big tracks. Approx .307 lift and 260 duration. This cam was 6 month in development. Special Ramp Designed for running 12 to 1 or higher compressions using Race Gas or Methanol. Use with Dual springs and 1.3 rocke
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Item No: NR-STAGE1KIT270
shown for reference only: $159.00
Basic Stage 1 Kit for improving the performance of Honda GX270 & 270/301cc OHVs. Simple to install, you can expect significant performance increases.
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HOW TO UPGRADE YOUR ENGINE
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REMOVE THE GOVERNOR
The first modification should be to disable or remove the governor. The governor restricts the engine to 3600 RPM. With the governor disabled or removed, the RPM will increase to about 5200 resulting in a substantial increase in performance. There is a very easy way to disable the governor. see How to Remove the Governor
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HIGH FLOW AIR FILTER
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HIGH FLOW EXHAUST
The stock exhaust is also very restrictive. A favorite among Kart Racers, the RLV Header Pipe and Silencer will give you a substantial boost in power and that great sound for a low cost. You will need the Locking Collar to fasten the silencer. Also available for use on both Karts and Minibikes are the Fatty Exhaust and Stinger Exhausts Headers for Maximum Power and Awesome Sound
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STAGE 1 KIT
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CARB JETS: Upgrading the Intake and Exhaust usually requires re-jetting the Carburetor. If you have to play with your choke to get your engine to run properly, you need to adjust the Carb Main Jet. For the Stock Carb see
Honda Main Jets. The .035 Main Jet seems to work best but you may want to try .034, .035 and .036 to see which works best for your engine. For our Mikuni Carbs see
Mikuni Main Jets 120-140 for Curved Intake, 170-190 for the Inverted Intake. Open the Float Bowl, unscrew the jet and put in a larger size. see Mikuni Tuning Guide |
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TOP PLATE
You will be removing the gas tank as part of your build. In addition to its billet aluminum good looks, the Top Plate supports installation of the Fuel Pump and optional Throttle Control. (if using a Mikuni Carb, you do not need to use the throttle control)
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BOX STOCK KIT
Box Stock is the Beginner Class for Kart Racing. The Box Stock Kit has everything you need to upgrade your stock engine to the Box Stock Class except the exhaust. Kit includes the Top Plate, Chain Guard / Heat Shield, Angled Air Filter, Billet Air Filter Adapter, Fuel Pump, Fuel Line, Throttle Linkage and Hardware and more. Add the RLV Exhaust to complete this kit
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UPGRADE THE VALVE SPRINGS
With the governor removed, the stock valve springs will be too weak to operate properly at high RPM. Installing stiffer 18lb Springs will prevent the valves from floating at high RPM
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SPARK PLUG
Installing a 3910X Spark Plug costs about $7 and can add an amazing 3/4hp to your engine. This plug is longer than the stock plug and creates more compression. Also, this plug does not need to be gapped or indexed to operate at optimum performance
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HEAD GASKET
We have seen thick stock head gaskets on an increasing number of engines. Replacing the stock gasket with a thin .010 gasket will decrease the size of the combustion chamber thereby increasing compression
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FLYWHEEL
Before going any further with your engine upgrade, we recommend replacing your heavy 7 pound stock flywheel with a much lighter and better balanced
Billet Aluminum Flywheel. The stock flywheel is prone to failure at high rpm, which could result in serious injury. The lighter weight will boost your horsepower and acceleration
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ROD
As the RPMs continue to increase, replacing the stock rod with a much stronger and lighter billet aluminum rod is needed to get from 5600rpm to 7200.
The ARC Rod is the best choice. It can be ordered stock length or It can also be ordered .010 or .020 longer to increase compression without machining the block, a big boost
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CAM
For the Box Stock Class, use the CL1-Improved Cam to follow the racing rules. If you don't care about rules, you can use the Superbox CM .275 Cam, which is as hot as you can go without Rocker-Arm upgrade
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SUPERBOX UPGRADE KIT
The Superbox Class is the advanced Clone Kart Racing Class. If you have a Box Stock Engine (Box Stock Kit installed) this Superbox Upgrade Kit will provide you with all the parts needed to upgrade to the more powerful Superbox class
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BUILDER PREPARED CLASS
The Builder Prepared Class is the top Clone Kart Racing Class. The complete Builder Prepared Parts Kit includes: Intake, Exhaust, Chain/Heat Guard, Top Plate, Fuel Pump, Valve Springs, Cam, Main Jet, Billet Flywheel, Billet Rod and more
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SUPERBOX PARTS KIT
Take your stock Honda, Titan, Predator and other Engines, and use this Superbox Parts Kit to Build your own Superbox class engine
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CRATE ENGINE KIT
Upgrade your stock Honda Titan or Predator engine with this Crate Engine Kit. Includes the Rod, Flywheel, Cam, Mikuni Carb/Intake, Stinger Exhaust, Superchrome Gas Tank and much more. CLOSED COURSE COMPETITION only
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CRATE ENGINE
Ready-to-Run, Complete Crate Engine. Choose a Titan or Predator. We will install, test, tune, crate and ship. CLOSED COURSE COMPETITION only
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