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.

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 15 depending on cam/carb selected.

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.

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.

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

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.

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

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 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.

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.

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.

The Stage 4 kit starts with package similar to that of the stage 3 but adds a Ported and Milled Head with stainless, stainless valves, stud kit, & HD valve train components. This kist allows up to 35+ HP out of a GX390 and 40+ out of 420/440cc engines.

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