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GX200 & 6.5 Chinese OHV 212 Predator 224cc Predator
208cc DuroMax GX240, GX270, & 9/11hp Chinese OHV GX340, GX390, 420 Predator, & 13/15hp Chinese OHV
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Hop Up Kit; GX340 to GX390, 420 Predator, & 13/15hp OHV; Stage 1 Hop Up Kit; GX340 to GX390, 420 Predator, & 13/15hp OHV; Stage 1

Basic Kit for Improving the Performance of GX390s, 420 Predators, 13/15 HP Chinese OHVs. Simple to Install and Provides Significant Performance Increases!

Our Price: $35.94
Hop Up Kit; GX240, GX270, 9/11hp OHV, & 301; Stage 1 Hop Up Kit; GX240, GX270, 9/11hp OHV, & 301; Stage 1

Basic Kit for Improving the Performance of GX270 & 270/301cc OHVs. Simple to Install, You Can Expect Significant Performance Increases!

Our Price: $41.15
Hop Up Kit, GX200 & 6.5 Chinese OHV, Stage 1 Hop Up Kit, GX200 & 6.5 Chinese OHV, Stage 1

Basic Kit for Improving the Performance of GX160, GX200s, and Chinese 6.5 Engines. Simple to Install, You Can Expect Significant Performance Increases!

Our Price: $45.61
Hop Up Kit, 212 Predator Hemi, Stage 1 Hop Up Kit, 212 Predator Hemi, Stage 1

Basic Kit for Improving the Performance of 212 Hemi Predator Engines. Simple to Install, You Can Expect Significant Performance Increases.

Our Price: $47.07
Hop Up Kit, 208cc DuroMax, Stage 1 Hop Up Kit, 208cc DuroMax, Stage 1

Basic Kit for Improving the Performance of 208 DuroMax Engines. Simple to Install, You Can Expect Significant Performance Increases!

Our Price: $47.86
Hop Up Kit, 212 Predator OHV (Old Style), Stage 1 Hop Up Kit, 212 Predator OHV (Old Style), Stage 1

Basic Kit for Improving the Performance of 212 OHV Predators (Old Style). Simple to Install, You Can Expect Significant Performance Increases.

Our Price: $48.07
Hop Up Kit, 224cc Predator, Stage 1 Hop Up Kit, 224cc Predator, Stage 1

Basic Kit for Improving the Performance of 224 Predator Engines. Simple to Install, You Can Expect Significant Performance Increases.

Our Price: $50.47
Hop Up Kit; GX240, GX270, 9/11hp OHV, & 301; Stage 2 Hop Up Kit; GX240, GX270, 9/11hp OHV, & 301; Stage 2

A Step up from the Stage 1, This Kit Is Designed to Further Improve the Power of GX240s and GX270s by Adding a Larger Carb and Cam.

Our Price: $157.00
Hop Up Kit; GX340 to GX390, 420 Predator, & 13/15hp OHV; Stage 2 Hop Up Kit; GX340 to GX390, 420 Predator, & 13/15hp OHV; Stage 2

A Step up from the Stage 1, This Kit Is Designed to Improve the Power and Durability of GX340s and GX390s.

Our Price: $175.00
Hop Up Kit, 208cc DuroMax, Mud Motor Kit with Exhaust Hop Up Kit, 208cc DuroMax, Mud Motor Kit with Exhaust

Special Kit Designed to Improve the Performance of 208cc Duromax Engines Used in Marine Applications, Including Mud Motors, Mud Skippers, Long Shafts, Mokais, etc.

Our Price: $186.00
Hop Up Kit, 224cc Predator, Mud Motor Kit with Exhaust Hop Up Kit, 224cc Predator, Mud Motor Kit with Exhaust

Special Kit Designed to Improve the Performance of 224cc Predator Engines Used in Marine Applications, Including Mud Motors, Mud Skippers, Long Shafts, Mokais, etc.

Our Price: $188.00
Hop Up Kit, GX200 & 6.5 Chinese OHV, Stage 2 Hop Up Kit, GX200 & 6.5 Chinese OHV, Stage 2

Maximum Performance without Opening up the Case! Same as Our Stage 1 Kit, but Also Includes Bored Carb and Performance Cam to Produce a Solid 10+ HP on GX200s & 6.5 OHVs.

Our Price: $220.00
Hop Up Kit, 212 Predator Hemi, Stage 2 Hop Up Kit, 212 Predator Hemi, Stage 2

For Maximum Performance without Opening up the Case! Same as Our Stage 1 Kit, but with the Addition of a Bored Carb and Performance Cam to Produce in Excess of 12 HP.

Our Price: $223.00
Hop Up Kit, 208cc DuroMax, Stage 2 Hop Up Kit, 208cc DuroMax, Stage 2

For Maximum Performance without Opening up the Case! Same as Our Stage 1 Kit, but with the Addition of a Bored Carb and Performance Cam to Produce a Solid 12+ HP on 208s.

Our Price: $223.00
Hop Up Kit, 224cc Predator, Stage 2 Hop Up Kit, 224cc Predator, Stage 2

For Maximum Performance without Opening up the Case! Same as Our Stage 1 Kit, but with the Addition of a Bored Carb and Performance Cam to Reach 12+ HP.

Our Price: $226.00
Hop Up Kit, 212 Predator OHV (Old Style), Stage 2 Hop Up Kit, 212 Predator OHV (Old Style), Stage 2

For Maximum Performance without Opening up the Case! Same as Our Stage 1 Kit, but with the Addition of a Bored Carb and Performance Cam to Produce 12+ HP.

Our Price: $255.00
Hop Up Kit, GX200 & 6.5 Chinese OHV, Stage 3 Hop Up Kit, GX200 & 6.5 Chinese OHV, Stage 3

Now You Are Getting Serious! A Step up from Our Stage 2 Kit, We Add a Racing Camshaft, a 22mm Carburetor, and a Billet Rod. This Kit Produces 13-15HP or More.

Our Price: $287.00
Hop Up Kit, 212 Predator Hemi, Stage 3 Hop Up Kit, 212 Predator Hemi, Stage 3

Now You Are Getting Serious! A Step up from Our Stage 2 Kit, We Add a Racing Camshaft, a 22mm Carburetor, and a Billet Rod. This Kit Produces 13-15HP or More.

Our Price: $289.00
Hop Up Kit, 224cc Predator, Stage 3 Hop Up Kit, 224cc Predator, Stage 3

Now You Are Getting Serious! A Step Up from Our Stage 2 Kit, We Add a Cam and a Choice of Carburetors. A Billet Rod and All Necessary Gaskets Are Also Included. HP Will Range between 11 and 15, Depending on Cam/Carb Selected.

Our Price: $317.00
Hop Up Kit, 212 Predator OHV (Old Style), Stage 3 Hop Up Kit, 212 Predator OHV (Old Style), Stage 3

Now You Are Getting Serious! A Step up from Our Stage 2 Kit, We Add a Racing Camshaft, a 22mm Carb Kit, and a Billet Rod. Produces 13-15HP or More.

Our Price: $323.00
Hop Up Kit, 208cc DuroMax, Stage 3 Hop Up Kit, 208cc DuroMax, Stage 3

Now You Are Getting Serious! A Step Up from Our Stage 2 Kit, We Add a Cam and a Choice of Carburetors. A Billet Rod and All Needed Gaskets Are Also Included. HP Will Range between 11 and 15, Depending on Cam/Carb Selected.

Our Price: $328.00
Hop Up Kit; GX240, GX270, 9/11hp OHV, & 301; Stage 3 Hop Up Kit; GX240, GX270, 9/11hp OHV, & 301; Stage 3

Now You Are Getting Serious! A Step up from Our Stage 2 Kit, This Is Designed to Improve the Power and Durability of GX240s and GX270s.

Our Price: $345.00
Hop Up Kit, 420 Hemi Predator, Stage 3 Hop Up Kit, 420 Hemi Predator, Stage 3

Now You Are Getting Serious! A Step up from Our Stage 2 Kit, This Will Further Empower the 420, Producing up to 20+ HP.

Our Price: $352.00
Hop Up Kit, GX390 & 13/15hp OHV, Stage 3 Hop Up Kit, GX390 & 13/15hp OHV, Stage 3

A Step up from the Stage 2, This Kit Is Designed to Improve the Power for GX340s and GX390s along with Improving the Durability.

Our Price: $382.00
Hop Up Kit, 212 Predator Hemi, Stage 4 Hop Up Kit, 212 Predator Hemi, Stage 4

Our Stage 4+ Kit Allows You to Customize a Kit for Your Application. The 4+ Kit Starts with Package Similar to That of the Stage 3 Kit, but Adds a Ported and Milled Head, Stainless Valves, Billet Rockers, and a Serious Cam Package.

Our Price: $456.00
Hop Up Kit, 224cc Predator, Stage 4 Hop Up Kit, 224cc Predator, Stage 4

Our Stage 4+ Kit Allows You to Customize a Kit for Your Application. Similar to That of the Stage 3 Kit, but Adds a Ported and Milled Head, Stainless Valves, Billet Rockers, and a Serious Cam Package. This Kit Will Allow You to Build a Motor in Excess of 20+ HP!

Our Price: $475.00
Hop Up Kit, 208cc DuroMax, Stage 4 Hop Up Kit, 208cc DuroMax, Stage 4

Our Stage 4 Kit Allows You to Customize a Kit for Your Application. Similar to That of the Stage 3, but Adds a Ported and Milled Head, Stainless Valves, Billet Rockers, and a Serious Cam Package. This Kit Will Allow You to Build a Motor in Excess of 20+ HP!

Our Price: $475.00
Hop Up Kit, 212 Predator OHV (Old Style), Stage 4 Hop Up Kit, 212 Predator OHV (Old Style), Stage 4

Our Stage 4+ Kit Allows You to Customize a Kit for Your Application. Similar to That of the Stage 3 Kit, but Adds a Ported and Milled Head, Stainless Valves, Billet Rockers, and a Serious Cam Package. This Kit Will Allow You to Build a Motor in Excess of 20+ HP!

Our Price: $488.00
Hop Up Kit, GX200 & 6.5 Chinese OHV, Stage 4 Hop Up Kit, GX200 & 6.5 Chinese OHV, Stage 4

Our Stage 4+ Kit Allows You to Customize a Kit for Your Application. Similar to That of the Stage 3 Kit, but Adds a Ported and Milled Head, Stainless Valves, Billet Rockers, and a Serious Cam Package. This Kit Will Allow You to Build a Motor in Excess of 20+ HP!

Our Price: $540.00
Hop Up Kit; GX240, GX270, 9/11hp OHV, & 301; Stage 4 Hop Up Kit; GX240, GX270, 9/11hp OHV, & 301; Stage 4

For Building a Serious a GX270 or 301! Similar to That of the Stage 3 Kit, but Adds a Ported and Milled Head with Stainless Valves, Stud Kit, and Heavy Duty Valve Train Components.

Our Price: $830.00
   
 
Our hop up kits are 100% complete with all parts needed to enhance your kart’s performance (engine not included). All kits require an aftermarket exhaust and/or header in order to work properly and get you the expected horsepower. The exhaust is not included and must be ordered separately. Horsepower ratings are for reference only and are based on a system with a tuned exhaust. Actual HP may be different.

Improve your vehicle’s performance with go-kart racing kits for some of the most popular models in kart racing. We have kits that are compatible with the Honda GX series, Chinese OHV, Predator engines, and more. Get maximum performance from stage one to four with kits made from stock parts for the best fit. Improve reliability and power even further with stage two hop up kits that include a bored carb and cam so you can get the most out of your vehicle. Take the upgrades even further to stage three with a billet rod and gasket to get even more horsepower out of your engine. Finally, we offer the peak of racing go-kart kits: the stage four hop up kits. Achieve peak performance with the addition of ported and milled heads, stainless valves, billet rockers, and a heavy-duty cam package. These kits are more customizable than the previous stages and allow you to build a motor exceeding 20 horsepower.