World Formula

Building off of the success of the Animal Racing engine, the World Formula was launched in 2003 in accordance with the CIK World Formula class rules. This complete engine package balances the latest in engine design and technology to provide racers with a consistent, low-maintenance and low-cost platform, in which to sharpen their driving skills and chassis setup. Hand-built and individually tested in our Milwaukee, Wisconsin skunk works

Dual Ball-Bearing, RACING Reinforced Cylinder
Billet Rod
Slotted, Stelite-Faced, Ground Cam w/ Compression Release
Dual, High-Silicon Valve Springs
PVL™ Digital Ignition System w/7,100 RPM Limiter
CNC D-Shape Intake Port
Walbro™ Round - Slide Carburetor
Dana™ Fire-Ring Head Gasket
Racing Crankshaft w/ Induction-Hardened Crankpin
Green™ Air Filter
Federal Mogul™ Moly-Coated Cam Ground, Barrel-Faced Piston
Chrome-Faced, Racing Only Ring Package
Port-Liner, Exhaust System
Mikuni™ Fuel Pump
Noram™ Clutch w/ Quick Change Sprocket Set
Automotive 3-Piece Valve Retainer System
Beefy Rocker Arm Stud Nuts

Model Number 124335
Type 8105-01
Displacement 206
Bore 2.6875/2.6885
Stroke 2.2
Compression Ratio 9.5 to 1
Factory Timing 29 degrees BTDC
Description Wrench / socket size Torque
Air Guard 7mm 40-50 lb-in. (4.5-5.6 Nm)
Blower Housing 10mm & 3/8" 60-110 lb-in. (7-12.5 Nm)
Carburetor (to manifold) 10mm 80-110 lb-in. (9-12.4 Nm)
Connecting Rod T27 140-150 lb-in. (16-17 Nm)
Cylinder Head Bolts 10mm 200-220 lb-in. (20-27 Nm)
Exhaust Brace Screws 10mm 95-125 lb-in. (11-14 Nm)
Exhaust Stud 10mm 95-125 lb-in. (11-14 Nm)
Flywheel Nut 15/16" 55-75 ft-lbs. (74.5-101 Nm)
Flywheel Fan 10mm 180-240 lb-in. (20-27 Nm)
Intake (to cylinder) 5mm Allen 70-90 lb-in. (8-10.2 Nm)
Oil Drain Plug 3/8" 100-125 lb-in. (11-14 Nm)
PVL Module 7mm 20-35 lb-in. (2.3-4 Nm)
Rocker Arm Stud 7/16" 90-120 lb-in. (10-14 Nm)
Rocker Arm Plate 10mm 70-90 lb-in. (7.9-10.1 Nm)
Rocker Arm Set Screw 1/8" Allen 50-70 lb-in. (5.6-7.9 Nm)
Spark Plug 5/8" Deep 95-145 lb-in. (11-16.4 Nm)
Side Cover 10mm 140-170 lb-in. (16-19 Nm)
Starter Gear #2 Phillips 35-53 lb-in. (4-6 Nm)
Top Control Plate 10mm 70-90 lb-in. (8-10 Nm)
Valve Cover 10mm Lower & 3/8" 30-60 lb-in. (3.5-7 Nm)

whats the top end speed of this engine? And, whats the pricing?

Asked by: Scott B
We will not have pricing as we do not sell direct. Please work with a local technical dealer for assistance:
Answered by: Nicole_BriggsStratton
Date published: 2014-12-03

Best exhaust system for us to run on world formula in a Jr sprint car?can't even hear our car compared the others and leaving us on the starts.we all are supposed to be stock motor internals.tried different gears didn't help much.they have different exhau

Asked by:
We were having the same problem.  check your clutch engagement RPM at least 4000.  ours was too low as well as the clutch disks were glazed over and would not kick in.  Once I reset the clutch engagement RPM and scuffed the clutch disks it took off like it did before
Answered by: racer124
Date published: 2014-09-25

I need to replace the intake (between carb and motor) because it must come stright out the side in a kid´s snowmobile. Can you help me with a parts number?

Asked by: Max3
To locate any information on your engine, you will first need the model type and code. Please see the following link for assistance in locating these numbers: Once you have this information you can find information on your engine here: Select engine as your product type and follow the directions for entering the model type and trim into the search fields.
Answered by: Nicole_BriggsStratton
Date published: 2014-09-02

what is the maximum RPM and horsepower rating of the engine

Asked by: Elad
Thanks for your question. We tend to stay away from horsepower simply because organizations rule set differ, the method for horsepower testing in the field varies, and your final choice of exhaust systems will impact horsepower. Between all of these variables you can see a several horsepower difference. With that said to give you some general numbers, the World Formula will be approximately around 11.25 hp.
Answered by: Nicole_BriggsStratton
Date published: 2014-09-25

What Is the valve lash on a world formula engine.

Asked by: saumsz
We recommend running ZERO lash set when the engine is COLD, on both the intake and exhaust. The reason for this is, when the engine gets up to operating temperature, our valve lash typically grows .0015-.002".
Answered by: Nicole_BriggsStratton
Date published: 2014-10-15

Whats the price Of the engine

Asked by: Kart2000
Please contact an authorized Racing Dealer for pricing and availability. You can find a dealer here:
Answered by: Nicole_BriggsStratton
Date published: 2014-05-28

Would this possibly be a good engine to use in a backyard go-cart or some sort of chassis to pull a human body?

Asked by: Acer
Briggs & Stratton racing engines are manufactured for sanctioned racing only. We do not recommend our products used for an application outside of their initial intention, as serious injury or death could result.
Answered by: Nicole_BriggsStratton
Date published: 2014-05-22

I have a formula 2 race engine I purchased with a kart,  I am wondering what fuel is needed to run in this engine,  it cuts out some times in some corners.  I have changed needle settings and float hight trying different things.  Any ideas?

Asked by: Derikdwyer
All of our engines are designed to run standard 87 octane gasoline. If the engine is cutting out in the corners, assuming a sprint verses enduro corner which could be related to fuel sloshing at the tank (been there, done that), I would recommend the following: With a stock carburetor continue to lean fuel out by raising the float height in .015" increments. When you enter the tight/bumpy corner, a bounce could be causing a momentary increase of fuel through your main jet. By lowering the fuel slightly in the carb bowl this is eliminated. Open your spark plug gap to .040". If you are experience a momentary rich condition opening your spark plug gap will take advantage of our digital ignition systems KV firing power to jump the gap increasing the burn. This will equal out any slight rich conditions. These are the two magic adjustments that will take your bog away. I would recommend watching our carburetor float height setting video which will walk you through how to set the height properly. I would also download our carburetor tuning guide which is available under the documents tab in the World Formula section.
Answered by: Nicole_BriggsStratton
Date published: 2014-05-08