4

A 3x2 setup tends to run on just the middle carb most of the time and the throttle on the outer two is only opened in high rpm operation. There isn't a need to match the number of barrels to the number of cylinders when the outer carbs are essentially just there to allow a lot more air in at full throttle and high rpm. Some race cars do use 4x2 setups with ...


2

That would iirc be a temperature controlled choke unit, so if it is warm enough then the choke is off. Operated by a temperature-sensitive coiled spring.


1

One of the issues is air control at very small openings. Smaller throttle bodies work better at or near idle (in general). As for maximum performance, a key input is V.E. (volumetric efficiency). To achieve high numbers, smooth airflow is important. Smooth flow promotes high velocity flow which in turn creates momentum. So when the piston hits bottom, ...


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

FI vs Carbeurated: Pros and Cons As SolarMike is trying to say in the comments, if you are doing your own maintenance work, rather than using a shop or mechanic, that will change the decision for you. This is one of the reasons that (even though this is partly a technical question) I still think it to be a bit off topic as it is worded now (maybe you want ...


1

It could be a leak in the bulb or connected tubing: Replacing the bulb is a fairly maintenance item, like replacing a spark plug.


1

Yes, your battery repair could definitely have something to do with it. At low revs there could be vibration and movement. I'd get that sorted first as it is the obvious weak point. If that doesn't sort it, then further diagnosis is required.


1

It's definitely a fueling issue, which puts it right in the realm of the carburetor. You said you cleaned the carb, yet didn't touch the screws. There's no way to thoroughly clean a carb without removing the jetting screws. Most carbs are setup to adjust the screws in all the way, then back them out 1.5 turns. This puts it in the ballpark, so there shouldn'...


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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