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WORLD FORMULA
Adjusting Valve Clearance
Feeler Gauge
Torque to 50 - 70 in-lbs.
(6 - 8 Nm)
Installing Cylinder Head Plate
Torque to 90 - 120 in-lbs.
(10 - 14 Nm)
Torque to
70 - 90 in-lbs.
(7.9 - 10.1 Nm)
GENERAL SPECS
Model: 124335
Type: 8104/8105
Displacement:
12.48 Cu. in.
- 205 cc
Design: Slant, 30 degree,
Overhead Valve, Electric Start
Bore: 2.6875/2.6885 in. (68.3mm)
Stroke: 2.2 in. (55.9mm)
Compression Ratio: 9.5 to 1
Factory Timing: 29 degrees BTDC
HIGHLIGHTED FEATURES
· 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
SPECIAL TOOL REQUIREMENTS
General Model 12 Manual Part No. 272147
PVL Flywheel Puller Part No. 19584
Flywheel Wrench Part No. 19433
TORQUE SPECS
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 95-125 lb-in. (11-14 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)
RACING SPECIFICS
PVL™ Ignition Module Gap - .010/.014 (.15/.36mm)
Digital Rev Limiter - 7,000 RPM +/- 50
Spark Plug - Champion™ RG4HC
Fuel Requirements - 98 Octane (RON)
Recommended Oil Capacity – 14-16 oz. of kart racing specific
oil. We no longer recommend using automotive oil beyond
break-in due to recent domestic and international changes
that could adversely affect product life.
Exhaust System Requirements-50mm x 57mm Flex Coupling,
50/90 Canister Muffler.
Starter System-12 Volts @ 20 Amp Capacity-180 Cold Cranking
amps. Refer to your sanctioning body rules for required
installation location.
OPTIONAL PERFORMANCE PARTS
High - G/Force Breather Bypass System - Part No. 555688
Fuel Filter - Part No.
Drain Plug - Part No.
3
WORLD FORMULA ENGINES
Not for
Reproduction
Not for
Reproduction