< ANIMAL – Krybaby Performance
ANIMAL

ANIMAL

Briggs & Stratton Animal race engines for Quarter Midget Racing. 

We build each racing engine to spec per the class and organization you will be competing in.  Every Krybaby Racing Engine is given 100% of what the rules allow  –  we build each engine to peak performance. 

Everyone starts quarter midget racing in the Honda 120 class - its a mild performer and easy to handle. The Briggs Animal is  the opposite "its an Animal" Way more power and a sound that is unmatched. Once they are fired up you know you have entered another level of racing. The animal has been around for 23 years with basically the same architecture but the newer the better. 

While this engine comes with the splined crank for the gear box no gear box is included so its another $300 in parts. The parts list is long and reaches nearly $650 before an engine is even purchased. Then the fun begins - the engine will be completely dissembled and every weight and measure checked and brought to the rule book specs. Out of the box its a good start and we will make it better. If you want win this class it starts with no lifting and ends with the checkered flag.

Again in 2024 we brought engines to the rumble in Fort Wayne and our animal build was king of the hill winning all the features of the weekend and nearly all the heat races too. 

Its not the cheapest way to race but there is no other engine like it.

The sister engine is the Briggs Lo206 with the orange side over - almost exactly the same and often used when the animal is not available due to limited production. The orange side cover gives it away and takes a few more parts to convert it ( now have to buy a $150 dollar crank and a few other parts) but the outcome is exactly the same but with a higher cost. 

MODEL/TYPPE(S)124332 8203-01 M.A.P. PRICE$759.00 HORSEPOWER/TORQUE8.8 hp/10 ft. lbs. torque*
DISPLACEMENT204cc BORE/STROKE2.6875”/2.6885” COMPRESSION RATIO8.5 to 1
RPM-DIGITALLY LIMITED6,100 RPM FACTORY TIMING29 degrees BTDC FUEL TYPE87 Octane
  • Reinforced, cast iron sleeved, dual ball bearing racing cylinder
  • Single cast, custom aluminum alloy cylinder head with high-flow intake port, custom seat/guide material
  • Squeeze cast, T-7 heat treated aluminum rod with reinforced I-beam
  • Carbon steel crankshaft with Induction hardened micro-polished crankpin reinforced timing gear and hardened splined output shaft for 6-1 gearbox (555721)
  • Custom top control plate firewall clearance
  • Cam ground, barrel faced, eutectic alloy piston with 3 piece ring set with chrome faced top ring
  • High silicon racing engineered valve springs for seasons of racing
  • High grade stainless steel, dished valves with nitrated exhaust
  • 3-piece automotive style keepers and reinforced rocker arm and lock ball
  • Digital ignition with built in rev limiter
  • Steel hub, cast aluminum flywheel
  • Briggs & Stratton tooled 22mm round slide, fully adjustable jet carburetor
  • Custom graphite composition head gasket

Fastener Torque Specs

Air Guard 7 mm 40-50 lb-in. (4.5-5.6 Nm)
Blower Housing 10 mm & 3/8” 60-110 lb-in. (7-12.5 Nm)
Carburetor (to manifold) 10 mm 80-110 lb-in. (9-12.4 Nm)
Connecting Rod 5/16” 125-135 lb-in (14-15 Nm)
Cylinder Head Bolts 10 mm 200-220 lb-in. (20-27 Nm)
Exhaust Brace Screws 10 mm 95-125 lb-in. (11-14 Nm)
Exhaust Stud 10 mm 95-125 lb-in. (11-14 Nm)
Flywheel Nut 15/16” 55-75 ft-lbs. (74.5-101 Nm)
Flywheel Fan 10 mm 180-240 lb-in. (20-27 Nm)
Intake (to cylinder) 5 mm Allen 70-90 lb-in. (8-10.2 Nm)
Oil Drain Plug 3/8” 100-125 lb-in. (11-14 Nm)
PVL Ignition Module 7 mm 20-35 lb-in (2.3-4 Nm)
Rocker Arm Stud 7/16 90-120 lb-in. (10-14 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 "10 mm (patched, grade 8.8) 10 mm (unpatched, grade 8.8) 10 mm (patched, grade 10.8 )" "215-230 lb-in. (24-26 Nm) 160-175 lb-in. (18-19 Nm) 260-270 lb-in. (29-30 NM)"
Top Control Cover 10 mm 70-90 lb-in. (8-10 Nm)
Valve Cover 10 mm lower & 3/8” 30-60 lb-in. (3.5-7 Nm)
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