RSS
Newsletter Recevez la newsletter :
Recherche Recherche :

Précédent   Forum Scooter-Station.com > Forums scooter > Accessoires et pièces scooter

Accessoires et pièces scooter Equipement du scooter : accessoires, bulles, échappements, top case, pièces adaptables ou de rechange, transmissions, pneus, etc.

Réponse
 
Outils de la discussion Modes d'affichage
  #1  
Vieux 05/08/2013, 08h11
junda junda est déconnecté
StatioScoot
 
Date d'inscription: juillet 2013
Messages: 2
Par défaut Carb Jet Needle Adjusting

Adjusting your jet needle makes your engine run leaner or richer. If your plug electrode is black and sooty looking you're too rich. If it's bare or glazed you're too lean. It should look a light tan or grey.Here are some common sense guidelines and tests from our friend Alleyoop for determining if your carb is running rich or lean, and a spark plug chart.

First remove the top of the carburetor:


Remove the long spring:





Then the diaphram, vacuum slide, and needle; be careful, the diaphram is somewhat delicate:






Next, use a phillips screwdriver to turn the screw at the bottom of the tube to release the needle, parts may vary considerably from carb to carb so please take note of yours!:




This is the plastic retaining nut with it's spring on this particular carburetor:








Turn the diaphram carefully upside down and remove the needle taking note of the retaining parts and their order, again, they may vary from these:





Carefully reposition the clip up or down as needed, moving the clip down richens the mixture by pulling the needle up higher and releasing more fuel. Moving it up leans the mixture by holding the needle farther down in the jet:





There's been some confusion in the past about what direction moving the clip "up" or "down" means. Up is higher and closer to the flat top of the needle and away from the taper. The following diagram shows how moving the clip affects the mixture:









Some needles do not have a clip and adjustment is more problematic. In these cases members have used different sized washers to change the mixture. If you need more assistance, ask in the GY6 or 250cc sections. Reassembly is of course in the reverse order, make sure the small tab (red arrow) on the diaphram fits into the small notch on the carburetor:








Put the cap on with it's tab (red arrow) oriented on top of the diaphram's:



__________________
1983 Yamaha Riva 180cc
2007 Yamaha Majesty 400cc

MotoPartsCenter
Réponse avec citation
Réponse

Outils de la discussion
Modes d'affichage

Règles de messages
Vous ne pouvez pas créer de nouvelles discussions
Vous ne pouvez pas envoyer des réponses
Vous ne pouvez pas envoyer des pièces jointes
Vous ne pouvez pas modifier vos messages

Les balises BB sont activées : oui
Les smileys sont activés : oui
La balise [IMG] est activée : oui
Le code HTML peut être employé : non

Navigation rapide


Fuseau horaire GMT +1. Il est actuellement 06h42.

Hébergement par Planet-Work

 

Annuaire des concessionnaires 
Trouvez votre concessionnaire
scooter moto près de chez vous

 
 

Pour trouver et acheter vos accessoires, pièces, équipements, occasions, moto et scooter en ligne

Pros online : notre sélection de boutiques, professionnels de la moto et du scooter sur internet

 

 

 
 

Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Version française #23 par l'association vBulletin francophone
© 2000-2011 Scooter-Station.com - Manuprod SARL