HONDA ENGINES
HONDA/ UPGRADE
HOW TO UPGRADE A HONDA GX120/160/200 ENGINE and clones
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bolt on upgrades!
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Many modifications can be performed on your Honda, or clone engine including Titan, Predator and others, 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
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Boost your Honda, Titan or Predator up to 26hp...
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Read the Upgrade Guide below,
CLICK ON THE BLUE LINKS TO SEE PARTS
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REMOVE THE GOVERNOR
The first modification should be removal of the governor. The governor restricts the engine to 3600 RPM. With the governor removed, the RPM will increase to about 5200 resulting in a substantial increase in performance. click to 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 Honda 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 Honda 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 or Clone Engine, 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
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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
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Item No:
List Price: $249.95
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Bolt-on Engine Upgrade Kit, bump-up to 11hp for your Honda GX120/160/200 (stock carb) engine including Titan and Predator Engines. Choose your Exhaust, Air Filter, K&N or Standard Angled High Flow Air Filter, K&N Pre-Filter, Intake Adapter + more
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Item No: GAR3910X
List Price: $12.00
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The AR3910X spark plug is longer. This increases compression and can add as much as 3/4hp. A must have for your Honda GX120/160/200, Titan and Predator. Works great on our Titan Engines
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Item No: DJ-1104
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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
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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:
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Ready-to-Run, just drop it in. Choose a Titan or Predator Engine, CLOSED COURSE COMPETITION only. Rated at about 25hp, Options: GTC Torque Converter, Drag Clutch, Mikuni Inverted Carb, Fatty or Stinger Exhaust. SPECIAL ORDER allow 10-14 days build time
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Item No: G6877
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The Pulse Inlet Fitting installs into the Valve Cover and allows installation of a vacuume line in. order to Pulse the Fuel Pump
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Item No: DJ-1130
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Clone valve cover with fuel pump pulse fitting installed
Item is as pictured.
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Item No:
List Price: $37.95
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Top plate/throttle mechanism is CNC machined from 1/8" aluminum plate so you know it looks great. The integrated throttle mechanism is adjustable to maximize foot pedal travel giving you more precise throttle control. Honda GX120/160/200, Titan, Predator
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Item No: DJ-1102
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Improved BSP-4 Cam for Honda GX160, GX200, Titan and Predator Engines. Heat treated, hardened, and designed for higher RPM the BSP-3 cam fits the 5.5 and 6.5hp engines Honda and Titan. Works great on our Titan Engines.
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Item No:
List Price: $59.00
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4100 Exhaust Silencer for Honda GX160/200. Installs on RLV 5436C exhaust pipe. works great on our Titan engines
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Item No:
List Price: $69.99
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5436C Honda GX200 Exhaust Curved Header exhaust pipe will wake up your Honda GX120/160/200. Get on the throttle with this bolted on your motor and prepare for instant RPMs and acceleration. works great on our Titan and Predator
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Item No:
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REMOVABLE FUEL TANK WITH BRACKET, BUTTERFLY CLAMP, VENT TUBE, PICK UP TUBE WITH WEIGHT AND ARE OPAQUE in. COLOR.
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Item No:
List Price: $84.95
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62XX Billet Rod for Honda GX160, GX200 Engines. Select stock length or a little longer to increase compression with no machining of the block needed. fits the 5.5 and 6.5hp Honda Engines, Titan and Predator. Works great on our Titan Engines MADE-IN-USA
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Item No:
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add this kit to your Honda GX200 engine and Build your own Crate Engine, CLOSED COURSE COMPETITION only, NHRA JR DRAG. Rated at about 25hp, Options: GTC Torque Converter, Drag Clutch, Mikuni Inverted Carb, Stinger Exhaust. ABOUT 25HP works great on Titan
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Item No: DJ-1055HD
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The "Red Stripe" spring is the strongest 10.8 lb spring on the market. The Heavy Duty clone spring will allow the engine builder to custom fit their spring kits. Having been through a specific process, which will reduce the amount of spring pressure loss.
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Item No: DJ-1103
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Dyno BP-2 cam meets lift requirements for stock but has a lot of extra duration producing better horsepower over a broader RPM range. Designed to fit 5.5 and 6.5hp engines Honda, Titan, and predator. Target (MAX) RPM: 7000+
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