Version 7/10 N ep o ro t fo du r ct io n Racing Performance Catalog & Reference Guide R Model/Type: 124335 8105-01 (International) 124335 8104-01 (US Standard)
Table of Contents SAFETY........................................................................................................................ 1 N ep o ro t fo du r ct io n WORLD FORMULA General Specs............................................................................................................. 3 Special Tools................................................................................................................ 3 Torque Specs.......................................................
N ep o ro t fo du r ct io n R SAFETY SAFETY 1
R N ep o ro t fo du r ct io n 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.
WORLD FORMULA Installing Cylinder Head Plate GENERAL SPECS world formula ENGINES Torque to 90 - 120 in-lbs. (10 - 14 Nm) 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 Torque to 70 - 90 in-lbs. (7.9 - 10.1 Nm) SPECIAL TOOL REQUIREMENTS General Model 12 Manual Part No. 272147 PVL Flywheel Puller Part No.
WORLD FORMULA cylinder assembly (Engine Model Series 124335) 272147 Repair Manual 555664 Ring Set 55513 Ring Set 557122 Piston Assembly 555665 Ring Set 55514 Ring Set 557123 Piston Assembly 555666 Ring Set 55515 Ring Set 557124 Piston Assembly 555667 Ring Set (Std., with File to fit Top Ring) (Std.) (.10" Over, with File to fit Top Ring) (.10" Over) (.20" Over, with File to fit Top Ring) (.20" Over) (.30" Over, with File to fit Top Ring) (.30" Over) (.10" Over - Contains 10 Top Rings) (.
WORLD FORMULA head assembly (Engine Model Series 124335) 699230 Hex Washer Head Metric Screw (Rocker Cover Top & Sides - 1/4”-20 UNC) (Rocker Cover Bottom) 555679 Rocker Cover world formula ENGINES 692557 Hex Washer Head Screw 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 (Cylinder Head Plate) 557025 Valve Retainer* 557024 Valve Spring* 557047 Exhaust Gasket N e
WORLD FORMULA housing & flywheel (Engine Model Series 124335) world formula ENGINES 555577 Label Kit 557125 Magneto Armature 699477 Metric Screw (Magneto Armature) 557128 Starter Ring Gear (Includes 4 Pcs. 557129 - Screw) 698039 Starter Drive Cover (Used on Type No.
WORLD FORMULA carburetor assembly world formula ENGINES (Engine Model Series 124335) 557081 Needle Jet 555647 Throttle Cable Boot 555650 Needle Valve Retainer (Contains 5 Clips & 5 Retainers) 557083 Throttle Valve 698973 Air Cleaner 557096 Air Cleaner 557088 Throttle Cable Cap (Water Repellent Cover, Optional) 690939 Nut+ (Carburetor) 557007 O-Ring Seal* N ep o ro t fo du r ct io n 557087 Throttle Return Spring 555586 Idle Speed Kit 555255 Pilot Jet 557130 Carburetor Spacer+ 557086 Emulsion
WORLD FORMULA clutch (Engine Model Series 124335) world formula ENGINES 557023 Centrifugal Clutch Assembly (Does not contain Radius Washer 2400025) 557115 Snap Ring 557116 Cartridge Springs Kit N ep o ro t fo du r ct io n (Includes 3 Orange & 3 Yellow) 557114 Clutch Cartridge (Includes Springs) 557111 Clutch Drum 557112 Clutch Hub Shaft 557113 Clutch Thrust Spacer/Bearing R 557115 Snap Ring 557019 Mounting Hardware 2400025 Radius Washer (Required for inboard mounting, included with Clutch Ass
WORLD FORMULA starter assembly world formula ENGINES (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 N ep o ro t fo du r ct io n 691286 End Cap* 691293 Brush Retainer* 497608 Brush Set*+ 690635 Clamp (Starter Solenoid) 557072 Starter Housing* 691029 Nut*+ (Brush Retainer) 692966 Starter Armature* 691261 Washer*+ (Brush Re
WORLD FORMULA control bracket & gasket set (Engine Model Series 124335) world formula ENGINES 808656 Fuel Pump 793379 Stop Wire (Used on Type No.(s) 8101 - 8105) 692602 Stop Wire (Rocker Switch, Used on Type No. 8002) 699479 Metric Screw (Control Panel) N ep o ro t fo du r ct io n 555699 Control Panel 557028 Starting Switch 692602 (Rocker arm Switch used on type no.
PZ26 Carburetor Tuning Guide world formula ENGINES To adjust the Idle Mixture Screw proceed as follows. Turn the Idle Mixture screw in until it lightly seats or stops. Back the screw out the specified number of turns. Warm the engine and set the Idle Speed screw slightly higher than the desired idle rpm. Turn the Idle Mixture screw in or out to obtain the highest rpm. Turn the Idle Speed screw to the desired idle rpm. A slightly rich idle mixture is usually better for acceleration.
ELECTRICAL SCHEMATIC Electric Start Wiring Diagram See starter wiring schematic for starter switch and battery cable connections. PULSE LINE FUEL PUMP FUEL PUMP 808656 N ep o ro t fo du r ct io n The following diagram shows the recommended layout for attaching the fuel pump to your World Formula racing engine. A Mikuni fuel pump is supplied. The fuel pump should be installed as recommended by your local CIK organization.
• There is a difference in technology with a standard paper air filter and your new Green High Performance Air Filter. • Paper filters stop dirt by being made up of small holes which allow the air to pass but not the dirt. Unfortunately this is very restrictive to your engine. After each particle of dirt is stopped the filter becomes that much more restrictive, until air flow is halted to almost nothing, starving your engine of air. This drastically decreases your engine’s performance.
Oil NOTE: For your engine break-in period use ONLY a high grade SAE-rated non-synthetic 30 weight oil. Use of synthetic oil during this process could prevent proper “seating” of the piston rings, etc. Engine Break-in (Running In) The first 30 minutes of this engine’s life are the most important to ensure trouble-free racing. After mounting to the kart, we recommend that the engine be broken in using any high grade non-synthetic SAE-rated 30 weight oil.
CARBURADOR WALBRO PZ Resorte Kit del Boquerel Aguja Válvula Multifuncional del Acelerador Kit de la Cubierta del Cable del Acelerador Tornillo de Velocidad de Ralentí Conjunto Estrangulador Kit Flotador Tobera Principal Tubo de Emulsión Mezcla de Ralentí Boquerel Piloto Boquerel Principal Kit Boquerel de Gasolina (Disponible Próximamente) Kit Taza del Flotador Rango Medio / Aceleración Parcial La aguja del boquerel controla principalmente el flujo de combustible entre 1/4 y 3/4 de abertura del ac
SUICHE DE ARRANQUE ESQUEMA ELECTRICO Esquema del Sistema de Cableado del Arranque Eléctrico PARA EL MONTAJE DEL MOTOR BATERÍA DE 12V Consulte el esquema del cableado del arranque para las conexiones del suiche de arranque y el cable de la batería. N ep o ro t fo du r ct io n MANGUERA DE PULSACIÓN Bomba de Combustible El siguiente diagrama muestra la disposición recomendada para sujetar la bomba de combustible a su motor de carreras World Formula. Se suministra una bomba de combustible Mikuni.
Existe una diferencia en tecnología con el filtro de aire de papel estándar y con su nuevo Filtro de Aire Verde de Alto Rendimiento. • Los filtros de papel atrapan la suciedad por estar compuestos de agujeros pequeños los cuales permiten que pase el aire pero no la suciedad. Desafortunadamente esto es muy restrictivo para su motor.
Este motor está diseñado para ser instalado EN POSICIÓN HORIZONTAL en un kart. Debido a la instalación del carburador y al sistema de lubricación, NO recomendamos instalar el motor a un ángulo de cualquier grado. Aceite El aceite es la vida de todo motor y usar uno de buena calidad es un deber! Se recomienda operar con no menos de 18 onzas de aceite sintético grado 30 de clasificación SAE.
Carburateur Walbro PZ Ressort Kit de gicleur du boisseau Coulisse d’accélérateur S’il n’est pas possible d’obtenir un ralenti correct quand la vis de mélange est dévissée entre 1/4 et 2 tours depuis sa position fermée, il faut changer la taille du gicleur de ralenti. Un bon gicleur de ralenti permet une accélération progressive depuis le ralenti jusqu’à un régime stabilisé du moteur correspondant à 1/4 de l’ouverture de l’accélérateur.
CONTACTEUR DU DÉMARREUR SCHÉMA ÉLECTRIQUE Schéma de câblage du démarreur électrique VERS LE SUPPORT DE MONTAGE DU MOTEUR BATTERIE 12V Voir le contacteur de démarrage et les raccordements de la batterie dans le schéma de câblage du démarreur. Le schéma suivant donne la disposition recommandée pour raccorder la pompe à essence au moteur de course World Formula. Une pompe à essence Mikuni est fournie avec le moteur. La pompe doit être installée selon les recommandations de votre organisation CIK locale.
Il y a une grande différence de technique entre un filtre à air standard en papier et votre nouveau Filtre Vert haute performance. • Les petits trous des filtres en papier arrêtent la poussière et laissent passer l’air. Malheureusement, ils restreignent beaucoup les capacités du moteur. Chaque particule de poussière arrêtée bouche un peu plus le filtre jusqu’à ce que le débit d’air devienne très faible, empêchant le moteur de respirer. Ceci réduit considérablement les performances du moteur.
NOTE : Pendant le rodage du moteur, n’utiliser QUE de l’huile non synthétique SAE 30 de bonne qualité. L’utilisation d’une huile synthétique pendant le rodage pourrait empêcher le bon « rodage » des segments, etc. Rodage du moteur N ep o ro t fo du r ct io n Les trente premières minutes de la vie de ce moteur sont les plus importantes pour son avenir en course. Après l’avoir monté sur le kart, nous recommandons de roder le moteur avec une huile non synthétique SAE 30 de bonne qualité.
Log Book WORK PERFORMED 1/31/08 example: Replaced Air Cleaner SEAL NUMBER WORK PERFORMED BY DK R N ep o ro t fo du r ct io n DATE 23
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