2

Qjets are bad about the secondary metering well plugs leaking fuel which causes a rich condition, this explains why vacuum never drops off. Most Kits include a metering well closed cell sponge to stop this. This is not a permanent fix as they eventually leak through the sponge, and needs replaced occasionally. This is a more permanent fix to the problem but ...


2

I believe you are going about it slightly wrong. Here's what I found out about the adjustment for the Q-jet: Start by completely warming the engine and setting the idle speed where it’s comfortable, and the engine will still idle in gear without experiencing problems. First, check to make sure both idle mixture screws are adjusted equally. Next with the ...


2

The symptoms you describe (hesitant, low power, running hot) point to a lean condition. It sounds like you may have set the floats too low, I'd set the floats back to where they were and see if that improves the situation.


2

This suggests that when the clutch pedal is pressed, the clutch is not fully disengaging. Check the linkage (if mechanical), or the hydraulics (if hydraulic). If these systems are operating correctly, then you'll probably have to disassemble things (I don't know how the Alto is designed) and examine the internal clutch pieces and bearings for faults.


1

Your suspicions are correct. Don't forget to check the oil level. It will probably start just fine the next day. If not: --turn off the fuel supply using the red knob I see in the picture. --move the fast/slow (silver) lever to the "fast" position. --pull-start the cord many times. --shake the entire unit from wheel-to-wheel (side-to-side) ...


1

The plenum is usually an enlarged section feeding the 4, 5, 6, 8 or more ports so that there is less turbulence in the air as it enters the ports. Too much turbulence and funny things start to happen like one cylinder runs rich compared to the others.


1

The shape of a carburetor creates low pressure inside, fuel jets spray fuel into the chamber where it is mixed thoroughly and pulled into the engine's cylinders. The fuel to air mix needs to be a certain ratio for the engine to run, too much fuel to air means it is too rich, too little fuel means it is too lean. Putting your hand on the air intake restricts ...


1

It appears that the engine ingested something it should not have, and it got stuck there, as evidenced by the beat up edges. It may not be magnetic, but I would try to get a parts grabber or a magnet on it and see if you can pull it out. Getting it out, if it is unconnected, may help the engine run better. Also, you will be able to see further in, as ...


1

It appears that the engine ingested something it should not have, and it got stuck there, as evidenced by the beat up edges. It may not be magnetic, but I would try to get a parts grabber or a magnet on it and see if you can pull it out. Getting it out, if it is unconnected, may help the engine run better. Also, you will be able to see further in, as ...


1

Overall, and especially on multi-cylinder engines, carburetors simply don't stand a chance. Jets that may get clogged, diaphragms that may rip, and reliance on exact pressure levels all provide failure points. Unless the bike has some sort of automatic start assist, you'll also have to get used to using the choke to start the engine when cold. If anything ...


1

Same problem here. New Ignition coil worked for me. The ignition coil wire was burned on the head under the plastic engine cover


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