Which way do you move the slide needle on a carburetor?
An E-clip sets the position, and that position is often referred to as “the clip.” Moving the clip up will lower the needle, making it leaner. When there are no clip positions on the needle, you can move the needle up by placing small washers (a move called shimming) in between the needle and slide.
What should the orifice of a needle jet be?
A needle jet that has an orifice of .105″ will be too lean to a point where it could introduce unwanted detonation. A needle jet that has an orifice of .107″ will be too rich where it will significantly reduce fuel mileage and could foul the spark plug.
Where is the injector in a multi point fuel injection system?
Port Injection System: The injector is fitted in the inlet manifold near the inlet valve. The uniform mixture formed enters into the cylinder. Every cylinder is provided with a separate injector in multi-cylinder engine as shown in fig below. Multi-point Flue Injection (MPFI) near Port 14.
Can a worn needle jet cause a bike to explode?
Yes, that hotter plug will burn off the unburnt fuel from the plug below half throttle caused by a worn needle jet, but when you take the bike out on the highway, and running above half throttle, the fuel mixture will be too lean for that hotter grade plug. This brings you are one step closer to catastrophic destructive pre-ignition and detonation.
A needle jet that has an orifice of .105″ will be too lean to a point where it could introduce unwanted detonation. A needle jet that has an orifice of .107″ will be too rich where it will significantly reduce fuel mileage and could foul the spark plug.
Yes, that hotter plug will burn off the unburnt fuel from the plug below half throttle caused by a worn needle jet, but when you take the bike out on the highway, and running above half throttle, the fuel mixture will be too lean for that hotter grade plug. This brings you are one step closer to catastrophic destructive pre-ignition and detonation.
Where is the metering needle on a Zenith Stromberg?
Closeup of the metering needle still in the piston. Before we start taking things apart, please note the small notch on the side of the base of the metering needle. Note that it points in the direction of the orifice (basically it points in the direction of the retaining screw).
Where are the transfer ports on a concentric slide?
The transfer ports are located each side of the back edge of the slide. They are the primary, the smaller of the two, located just behind the back edge of the slide and the secondary, larger than the primary, and located under the back edge of the slide. • The typical Pilot jet in a 4 stroke version of the Concentric is pressed into the body.