Home > Hop Up Kits
We found 20 results matching your criteria.
Choose a sub category:
GX200 & 6.5 Chinese OHV GX160 Honda 212 Predator
GX240, GX 270s, & 8/9 Hp Chinese OHV GX390, GX340, 420 Predator, & 11 hp up Chinese OHV Builders Prepared (AKRA)
BSP & AKRA F200 Kits

BOLT ON HOP UP KITS FOR HONDA & CLONES

Kits are 100% Complete with all parts needed (Engine not Included). All kits require Aftermarket Exhaust and/or Header to work properly. Exhaust is not included and must be ordered separate. Horsepower ratings are for reference only and assumed tuned exhaust. Actual HP may be different.


WARNING: STOCK FLYWHEELS ARE UNSAFE!!!!

ANY MOTOR WITH GOVERNOR REMOVED SHOULD USE AN ALUMINUM FLYWHEEL.
Sort By:
Page of 1
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, 200s, and Chinese 6.5 Engines. Simple to install, you can expect significant performance increases.

Our Price: $49.99
Hop Up Kit- 212 Predators, Stage 1 Hop Up Kit- 212 Predators, Stage 1

Basic kit for improving the performance of GX160, 200s, and Chinese 6.5 Engines. Simple to install, you can expect significant performance increases.

Our Price: $49.99
Hop Up Kit, GX340 - GX390, 420 Predators and 13/15hp, Stage 1 Hop Up Kit, GX340 - GX390, 420 Predators and 13/15hp, Stage 1

Basic kit for improving the performance of GX390s, 420 Predators, 13/15 hp Chinese OHVs. Simple to install, you can expect significant performance increases

Our Price: $58.99
Hop Up Kit - GX240 - GX270 - 301 Predators and 9/11hp , Stage 1 Hop Up Kit - GX240 - GX270 - 301 Predators and 9/11hp , Stage 1

Basic kit for improving the performance of GX270 & 270/301cc OHVs. Simple to install, you can expect significant performance increases

Our Price: $58.99
Hop Up Kit - GX200 & 6.5 Chinese OHV's, Stage 2 Hop Up Kit - GX200 & 6.5 Chinese OHV's, Stage 2

For those looking to get the maximum performance without opening up the case, we offer our stage 2 kit. Where possible, we only use genuine Honda components to improve reliability and power. Same as our stage 1 kit but with the addition of a bored carb and to produce a solid 10+ hp on GX200s.

Our Price: $87.99
Hop Up Kit- 212 Predators, Stage 2 Hop Up Kit- 212 Predators, Stage 2

For those looking to get the maximum performance without opening up the case, we offer our stage 2 kit. Same as our stage 1 kit but with the addition of a bored carb to produce in excess of 10 hp.

Our Price: $87.99
Box Stock Project Kit (Upgrade Kit), Stage 1 Box Stock Project Kit (Upgrade Kit), Stage 1

Includes everything you need to set your engine for the Box Stock class (engine not included). Some parts may differ from picture.

Our Price: $142.99
Hop Up Kit - GX240 - GX270 and 8/9hp Chinese OHV, Stage 2 Hop Up Kit - GX240 - GX270 and 8/9hp Chinese OHV, Stage 2

Step up from the Stage 1, this kit is designed to further improve the power for the GX240s and GX270s by adding a larger carb and cam.

Our Price: $157.99
Hop Up Kit - GX200 & 6.5 Chinese OHV's, Stage 3 Hop Up Kit - GX200 & 6.5 Chinese OHV's, Stage 3

Now you are getting serious. A set-up from Stage 2 kit, we add a cam and a choice of carburetors. A billet rod and all need gaskets are also included. HP will range between 11 and 14 depending on cam/carb selected.

Our Price: $199.99
Hop Up Kit- 212 Predators, Stage 3, New Style (Hemi) Hop Up Kit- 212 Predators, Stage 3, New Style (Hemi)

Now you are getting serious. A set-up from Stage 2 kit, we add a cam and a choice of carburetors. A billet rod and all need gaskets are also included. HP will range between 11 and 14 depending on cam/carb selected.

Our Price: $209.99
Hop Up Kit- 212 Predators, Stage 3, Old Style (non-Hemi) Hop Up Kit- 212 Predators, Stage 3, Old Style (non-Hemi)

Now you are getting serious. A set-up from Stage 2 kit, we add a cam and a choice of carburetors. A billet rod and all need gaskets are also included. HP will range between 11 and 14 depending on cam/carb selected.

Our Price: $219.99
Upgrade Kit, Builder Prepared, Kit A Upgrade Kit, Builder Prepared, Kit A

Kit A - Upgrade BSP to Builder Prepared

If you have Box Stock Engine built according to Box Stock Rules and want to upgrade to the more powerful Builder Prepared Class, this kit contains the new parts you need.

Includes:

  • Camshaft, Builder Prepared

  • Billet Rod, Std Length

  • Carburetor, .625 Merthanol

  • Spring, Valve, 26 lb, Pair

  • RLV 3 Stage Exhaust Pipe

  • Muffler and Clamp

Our Price: $239.99
Hop Up Kit - GX240 - GX270 and 8/9hp Chinese OHV, Stage 3 Hop Up Kit - GX240 - GX270 and 8/9hp Chinese OHV, Stage 3

As step up from the Stage 2, this kit is designed to improve the power for the GX340s and GX390s along with improving the durability.

Our Price: $369.99
Upgrade Kit, Builder Prepared, Kit B Upgrade Kit, Builder Prepared, Kit B

Same as Kit B - Builder Prepared Complete Kit,

Same as Kit A, but for those who wand to build a Builders Prepared from scratch. Kit includes everything you need except the engine (some parts may vary from picture)

Kit Includes

  • Top plate/throttle hookup
  • Fuel Pump (Mikuni or Walbro)
  • Pulse inlet fitting
  • 5' fuel hose
  • Chain guard/heat shield
  • Billet Aluminum Flywheel
  • Camshaft, Builder Prepared
  • Billet Rod, Std Length
  • Carburetor, .625 Methanol
  • Spring, Valve, 26 lb, Pair
  • RLV 3 Stage Exhaust Pipe
  • Muffler and Clamp
  • Billet Air Filter Adapter
  • Angled Filter

    Camshaft, Builder Prepared

  • Billet Rod, Std Length

  • Carburetor, .625 Merthanol

  • Spring, Valve, 26 lb, Pair

  • RLV 3 Stage Exhaust Pipe

  • Muffler and Clamp

  • ;

    • Filter should be sprayed with K&N type oil, especially in dirt applications. Oil not included click here

    Our Price: $429.99
    Hop Up Kit - GX340 - GX390, 420 Predators, and 13/15hp Chinese OHV, Stage 2/3 Hop Up Kit - GX340 - GX390, 420 Predators, and 13/15hp Chinese OHV, Stage 2/3

    As step up from the Stage 1, this kit is designed to improve the power for the GX340s and GX390s along with improving the durability.

    Our Price: $439.99
    Hop Up Kit - GX200, 6.5 Chinese OHV's, Stage 4 Hop Up Kit - GX200, 6.5 Chinese OHV's, Stage 4

    Our Stage 4+ kits 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. Options include everything from roller rockers to stroker kits. This kit will allow you to build a motor in excess of 20+ hp.


    KIT INCLUDES:


    • Race/Open Air Filter & Adapter,
    • 22mm Mikuni Carb Kit (other carbs optional)
    • Ported & Milled Chinese OHV Head
    • 1.2 Billet Rocker Arms
    • Chrome Moly Pushrods
    • Stud Kit
    • 26 lb Springs,
    • Lash Caps
    • Offset Timing Key (not with all flywheels)
    • Gasket Kit
    • Billet Rod (not shown in picture), std with Chinese OHVs, .020 with GX200s
    • Billet Guide plate
    • Choice of Compression Ratios - Compression ratios based on Flat-Top piston. If a Dished piston is used, deduct approx 1.5 points,
    • Choice of Cams
    • Optional Long Rod
    • Optional Roller Rockers
    • Optional Flywheels
    • Optional Crankshaft
    • Optional Stroker Kit
    Honda Kits use genuine Honda 18cc Heads, Clone Kits use 22cc Clone Heads (Honda kits will fit Clone if 18cc head is desired)


    Picture is for reference only!!! Actual content based on above description and selections. In otherwords, the flywheel shown is optional!!
    Due to the head work involved in these kits, Allow 1 week to ship

    Filter should be sprayed with K&N type oil, especially in dirt applications. Oil not included click here

    Note: This kit will not fit Harbor Freight 212 (predator) engines. Please see our Predator Kits for those applications

    These kits are intended for experienced engine builders. Some clearancing, fitment, or other engine building "tricks" may be needed.

    Aluminum or Honda flywheel recommended. Stock flywheels are prone to failure and very DANGEROUS

    Our Price: $619.99
    Hop Up Kit - 212 Predators, Stage 4 Hop Up Kit - 212 Predators, Stage 4

    Our Stage 4+ kits 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. Options include everything from roller rockers to stroker kits. This kit will allow you to build a motor in excess of 20+ hp.


    KIT INCLUDES:


    • Race/Open Air Filter & Adapter
    • 22mm Mikuni Carb Kit (other carbs optional)
    • Ported & Milled Head (OHV or Hemi depending on kit)
    • Oversize Stainless Valves (27/24 on Old style, 28/25 on Hemis)
    • 1.2 Roller Tip Rocker Arms
    • Chrome Moly Pushrods
    • Stud Kit
    • 26 lb Springs,
    • Lash Laps
    • 8 degree Timing Key,
    • Gasket Kit
    • Billet Rod
    • Billet Guide plate
    • Choice of Compression Ratios - Compression ratios based on Flat-Top piston. If a Dished piston is used, deduct approx 1.5 points,
    • Choice of Cams
    • Optional Long Rod
    • Optional Roller Rockers
    • Optional Flywheels
    • Optional Crankshaft
    • Optional Stroker Kit


    Picture is for reference only!!! Actual content based on above description and selections. In other words, the flywheel shown is optional!!

    Due to the head work involved in these kits, Allow 1 week to ship

    Note: Hemi Kits do not included Valve Cover. Order Seperate.

    Filter should be sprayed with K&N type oil, especially in dirt applications. Oil not included click here

    These kits are intended for experienced engine builders. Some clearancing, fitment, or other engine building "tricks" may be needed. Hemis may need pistons notched for valve clearance


    Aluminum or Honda flywheel recommended. Stock flywheels are prone to failure and very DANGEROUS

    Our Price: $639.99
    Hop Up Kit - GX240 - GX270 and 8/9hp Chinese OHV, Stage 4 Hop Up Kit - GX240 - GX270 and 8/9hp Chinese OHV, Stage 4

    For building a serious a GX270 or 301, the 4 kit starts with package similar to that of the stage 3 kit but adds a Ported and Milled Head with stainless, stainless valves, stud kit, & HD valve train components.

    Our Price: $819.99
    Hop Up Kit - GX340 - GX390, 420 Predators, and 13/15hp Chinese OHV, Stage 4 Hop Up Kit - GX340 - GX390, 420 Predators, and 13/15hp Chinese OHV, Stage 4

    The 3 kit starts with package similar to that of the stage 2 kit but adds a Ported and Milled Head with stainless, stainless valves, stud kit, & HD valve train components.

    Includes

    • Race/Open Air Filter & Adapter,
    • Choice of Carbs
    • Choice of Cams
    • Ported Head, Milled .100" (Chinese OHV)
    • Stainless valves
    • Aluminum Retainers & Split Keepers
    • Chrome Moly Pushrods
    • Single or Dual Springs
    • 8 degree Timing Key,
    • Billet Rod +(.040 longer)
    • Carb, Head, & Case gaskets
    • Stud Kit
    • Roller Tip 1.2 Rocker Arms (Optional Aluminum Roller Rockers)
    • Optional Header/Exhaust
    • Optional Aluminum Flywheel

    Picture for reference only and may show optional parts. See above description for actual content.
    Header not included unless specified.

    Due to head work required, allow 1 week to ship.

    Note: Use of the Choke Bracket requires use of a stock Honda (or Chinese OHV) "Air Filter to Carb Gasket". This is not included in the kit. You can use the one that came with the motor, or can purchase one at
    ;
    Filter should be sprayed with K&N type oil, especially in dirt applications. Oil not included click here

    These kits are intended for experienced engine builders. Some clearancing, fitment, or other engine building "tricks" may be needed.

    Billet Aluminum flywheel recommended. Stock flywheels, esp "Clone" are prone to failure and very DANGEROUS

    Note: UT2s series Hondas (2012 & up) or later have a built in Rev Limiter in the coil and will require a new coil to exceed 4000 rpm. The UT2 coils (4 wire) can only be used with stock flywheels.
    If using a Billet Flywheel, you must run a UT1 style coil (single wire).

    13/15 Chinese Engines (414, 420, 460) usually have UT1 style coils already. However some Lifans and 420s have a digital ignition and will need a Honda UT1 coil to run t he billet flywheel    .

    Our Price: $908.99
    Upgrade/Hop - up Kit - GX200, F200 Upgrade/Hop - up Kit - GX200, F200

    Complete Kit to to prepare a GX200 for F200 Class. Kit includes

    • Camshaft, F200
    • Choke Holder, aluminum
    • Cover, Valve Cover w/Nipple
    • Flywheel, Billet
    • Fuel Pump Pulse Fitting, Brass
    • Fuel Pump, Mikuni, Rectangular
    • Fuel Pump, Mounting Plate
    • Guide Plate, Billet, GX200
    • Key, Timing, Offset,
    • Lash caps, 5.5mm,
    • Pushrods, Chrome Moly
    • Retainer, 5.5mm, Alum/keepers
    • Rocker Arms, Reinforced,
    • Rod, Connecting, Billet,  Std
    • Spring, Valve, 37 lb, Pair
    • Stud Kit, GX200,
    • Stud Kit, Valve Cover, GX200
    • Valve, 24 mm x 5.5, SS
    • Valve, 27 mm x 5.5, SS
    • Bearing, Case, ABEC 5 C3,
    • Exhaust, F200, Kit w/muffler
    • Tillotson Dominator Kit, F200

     

    ;
    Filter should be sprayed with K&N type oil, especially in dirt applications. Oil not included click here
     

    Our Price: $1,019.99