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Briggsracing.com
Briggs&sTra TTOn POsT OffICe bOx 702
CORPORATION MIwl Aukee, wI 53201 usA
414 259 5333
MS-5702-4/08 ©2008 Briggs & Stratton Corporation
Not for
Reproduction
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Version 4/08 Racing Performance Catalog & Reference Guide Model/Type: 124435 8105-01 Not for Reproduction
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Table of ConTenTs safeTY .................................................................................................1 WoRlD foRMUla General Specs ......................................................................................3 Special Tools .........................................................................................3 Torque Specs ........................................................................................3 Racing Specifics ...........................
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safeTY 1 Not for Reproduction safeTY
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safeTY Briggs & stratton does not approve or authorize the use of these engines on 3 wheel all terrain vehicles (atvs), motor Bikes, fun/recreational go-karts, or aircraft products. use of these engines in such applications could result in property damage, serious injury (including paralysis), or even death. this engine requires special technical expertise and preparation Before it can Be used in competitive events. 2 Not for Reproduction
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WoRlD foRMUla Installing Cylinder Head Plate GeneRal sPeCs Torque to 90 - 120 in-lbs. Model: 124335 (10 - 14 nm) Type: 8105 Torque to Displacement: 12.48 Cu. in. 70 - 90 in-lbs. - 206 cc (7.9 - 10.1 nm) Design: Slant, 30 degree, Overhead Valve, Electric Start Bore: 2.6875/2.6885 in. Stroke: 2.2 in. Compression Ratio: 9.5 to 1 Factory Timing: 29 degrees BTDC sPeCIal T ool ReQUIReMenTs General Model 12 Manual Part No. 272147 PVL Flywheel Puller Part No. 19584 Flywheel Wrench Part No. 19
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WoRlD foRMUla enGInes WoRlD foRMUla cylinder assembly (engine Model series 124335) 555664 Ring Set 55513 Ring Set 557121 Piston Assembly (Std.) (.10" Over - Contains 10 Top Rings) (Std., with File to fit Top Ring) 272147 Repair Manual 555665 Ring Set 55514 Ring Set 557122 Piston Assembly (.10" Over) (.20" Over - Contains 10 Top Rings) (.10" Over, with File to fit Top Ring) 555666 Ring Set 55515 Ring Set 557123 Piston Assembly (.20" Over) (.30" Over - Contains 10 Top Rings) (.20" Over, with File
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WoRlD foRMUla head assembly (engine Model series 124335) 699481 Hex Washer Head Metric Screw (Rocker Cover Bottom) 692557 Hex Washer Head Screw (Rocker Cover Top & Sides) 555679 Rocker Cover 691890 Rocker Cover Gasket* 557045 Exhaust Manifold 691764 Hose Connector 694543 Rocker Arm Adjuster* 557015 Rocker Arm* 694544 Rocker Arm Stud* 699230 Hex Washer Head Metric Screw 557016 Valve Cap* (Cylinder Head Plate) 557025 Valve Retainer* 691343 Push Rod Guide* 557047 Exhaust Gasket 557024 Valve 698214
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WoRlD foRMUla enGInes WoRlD foRMUla housing & flywheel (engine Model series 124335) 555577 Label Kit 557125 Magneto Armature 557128 Starter Ring Gear (Includes 4 Pcs. 557129 - Screw) 699477 Metric Screw (Magneto Armature) 698039 Starter Drive Cover 555568 Stop Wire (Used on Type No. 8002 & 8003) 557126 Flywheel 699201 Screw (Flywheel Fan) 557134 Blower Housing 699201 Screw 555629 Hex Washer (Starter Drive Cover) Head Metric Screw (Blower Housing) 692592 Flywheel Fan 699359 Hex Jam Nut (Flywhe
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WoRlD foRMUla carburetor assembly (engine Model series 124335) 557081 Needle Jet 555647 Throttle Cable Boot 557083 Throttle Valve 555650 Needle Valve Retainer (Contains 5 Clips & 5 Retainers) 698973 Air Cleaner 557096 Air Cleaner (Water Repellent Cover, 557088 Throttle Optional) Cable Cap 690939 Nut+ (Carburetor) 557087 Throttle Return Spring 555586 Idle Speed Kit 557007 O-Ring Seal* Pilot Jet 557086 Emulsion Tube 557130 Carburetor Spacer+ 557012 Main Jet (Gasoline - Contains: 30 & 34 mm Pi
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WoRlD foRMUla enGInes WoRlD foRMUla clutch (engine Model series 124335) 557023 Centrifugal Clutch Assembly (Does not contain Radius Washer 2400025) 557115 Snap Ring 557116 Cartridge Springs Kit (Includes 3 Orange & 3 Yellow) 557114 Clutch Cartridge (Includes Springs) 557111 Clutch Drum 557112 Clutch Hub Shaft 557115 Snap Ring 557113 Clutch Thrust Spacer/Bearing 557019 Mounting Hardware 557020 Clutch Gear (17T, #219) 557021 Clutch Gear (16T, #219) 557092 Clutch Gear (19T, #219) 557091 Clutch Gear
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WoRlD foRMUla starter assembly (engine Model series 124335) *Included with 557068 Starter Assembly +Included with 557073 Brush Retainer 557120 Screw 690323 Screw* (Support Bracket) (Starter Motor) 557119 Support Bracket (Starter) 691532 Starter Strap 691286 End Cap* 691293 Brush Retainer* 690635 Clamp (Starter Solenoid) 497608 Brush Set*+ 557072 Starter Housing* 691029 Nut*+ (Brush Retainer) 692966 Starter Armature* 691261 Washer*+ (Brush Retainer) 557067 Starter Solenoid 692353 Pinion Gear 790
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WoRlD foRMUla enGInes WoRlD foRMUla control bracket & gasket set (engine Model series 124335) 808656 Fuel Pump 793379 Stop Wire (Used on Type No.(s) 8104, 8105, 8106) 692602 Stop Wire (Rocker Switch, Used on Type No. 8002) 699479 Metric Screw (Control Panel) 555699 Control Panel 557028 Starting Switch *Included with 557110 Engine Gasket Set + Included with 557027 Valve Gasket Set 557044 Intake Gasket*+ 694088 Cylinder Head Plate Gasket*+ 699485 Crankcase Gasket* 691890 Rocker Cover Gasket*+ 2998
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PZ26 Carburetor Tuning Guide If a smooth idle cannot be obtained with the Idle Mixture screw between 1/4 - 2 turns out from closed, a different size Pilot Jet may be needed. The proper size Pilot Jet will allow for smooth acceleration from an idle and steady engine speed up to 1/4 throttle opening. Midrange / Part Throttle The Jet Needle primarily controls fuel flow between 1/4 and 3/4 throttle opening. The Jet Needle has five notches and a C-clip on the top of it. To richen the part throt
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WoRlD foRMUla enGInes WoRlD foRMUla electric starting system (engine Model series 124335) Electric Start Wiring Diagram 12 Not for Reproduction
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log book DaTe WoRK PeRfoRMeD seal nUMbeR W oRK PeRfoRMeD bY 1/31/08 example: Replaced Air Cleaner DK 13 Not for Reproduction
