Why does a motorcycle need a battery to keep running?
If you bike has a magneto, you don’t need a battery to keep it running, but there are very few of those bikes around anymore - small dirt bikes, maybe. If you have a magneto and kick start you don’t need a battery at all. Road legal bikes (with fuel injection systems and electronic ignitions) have too many power demands for a magneto to work, so they have an alternator and a battery.Modern bikes have fuel injection, fuel pumps, electronic ignition, computers, lights and bells and whistles (accessories) that all need to work before your bike will start and run. They also have an alternator which runs off the engine. The alternator outputs more energy the faster the engine is running. When at idle, the alternator doesn’t produce enough power to keep the ignition and the accessories running. When at higher RPM, the alternator produces more power than the bike needs, therefore it has a regulator on the system to keep it from being overcharged.The excess energy needs to go somewhere and that is part of a battery’s job. It store energy for later use at higher RPM. At lower RPM, the battery provides extra juice to keep things working and the lights from dimming.The battery is a metering device for electricity in your bike. It evens out the distribution of electricity through all of the possible cycles of use. It’s kind of a pacifier, raising the lows and lowering the highs of alternator output. It helps protect delicate electronic circuits from frying. The battery stores enough energy to turn the starter - which has an enormous demand for amps, compared to anything else the bike runs.Most modern bikes will not run without a battery, nor will they start without a battery. You have to have enough electricity to power the fuel pump, the sensors and the computers, as well as the starter itself to get the engine to run and idle. Most of these bikes cannot be bump started with a dead battery or no battery. The alternator simple won’t turn fast enough nor long enough to power the fuel pump and the ignition won’t turn on until the fuel system has enough pressure.
Virago 535c won't start. Ran out of gas. Bikes turning over but won't start?
after all that those guys said set the carb to the PRI position to prime the carbs by filling the float bowls.Only set in that position for about a minute as the fuel flows continuously in that position.
My motorcycle died while riding. After, it cranks, but doesn't turn over. Why?
So what you're seeing is "fuel starvation" - you've juice to crank the motor, but it won't 'catch', or "Air starvation" - you're running too rich and there's not enough oxygen for the fuel to burn, flooding the engine.Possible causes: * Low/no fuel. If your ride has a fuel "petcock" make sure that it hasn't been set to Off, or if you've not much fuel in the tank, set it to Reserve (the normal "On" setting doesn't draw fuel from the bottom of the tank). * Blocked fuel line/filter. If your bike has sit for a long time, or you've not had the fuel tank cleaned, you may have pulled gunk into the fuel filter and clogged it, and it's time to change out the filter. Or, your fuel line is clogged. Old bikes that have sit around often get this problem.* Bad fuel pump (on bikes that have one instead of gravity-feed fuel lines). * Blocked air filter/airbox - check to make sure that you've not got anything (rat's nest, clogged filter) impeding airflow. Usually bikes run 'lean' so this is not that common with newer bikes. * Blocked/clogged exhaust.
Why is my dirt bike backfiring?
I have an 04 crf230f. it recently started backfiring whenever i give it gas. i didn't think much of it at first, but it then started really getting bad. i pulled the carb and cleaned it out, got a new plug, and made sure i had good fuel and that the boot wasnt split. it will idle fine, but whenever i really give it gas, itll will really sputter and backfire until it gets to high rpm. anyone have an idea of what might be causing this?
I put too much oil in my 2-stroke bike engine. What do I do now?
If you have used a suction device to suck all of it out of your tank and refilled with the right ratio, now take out the spark plugs and clean them up with a clean rag and wipe the gluck off the holes where you put the spark plugs back in. If it does not start, you may have to clean the plugs with a bit of gas, and get the hose cleaned up better. If not, your bicycle shop or dealer or garage mechanic may give you more help. Best of luck.
If your engine seized, will it turn over at all?
If your engine seized, will it turn over at all? It depends on why it seized and which components seized. Back in the 1980s I had a car engine seize on me because of a blockage in one of the oil ways, which lead to a big end bearing seizing onto the crankshaft. The engine suddenly changed note, lost all power, and I could see a trail of smoke behind me. As soon as I depressed the clutch to free-wheel to a halt, the engine simply stopped, seized solid, and all attempts at restarting it didn't turn the crankshaft in the slightest. Even a very long handled spanner on the front pulley bolt wouldn't budge it. However after half an hour or so, when the engine had cooled down, it did restart, but with the accompaniment of a horrendous - and expensive - knocking sound from the bottom end, but at least I was able to drive the couple of miles back home, very slowly... If it's one of the piston rings which has seized, or perhaps a bearing on a camshaft, you could well find the engine seized up permanently though. The only reason I was able to eventually restart mine was because the white metal lining to the big end bearing had melted out, so a gap was left after it had cooled.
What are the pros and cons of changing the stock air filter in my bike? Will it also improve the fuel efficiency?
Most bikes come from the factory on the lean side. Meaning, the manufacturers dial back the bike's use of fuel. Some of this is for fuel economy, but mostly it's to meet emissions and sound regulations.The basic premise of an engine is to bring in air & fuel, burn it, then spew out the exhaust. This process needs to be a fine tuned system. For instance, if you were to seriously open up your intake, your bike would probably run like crap. What was already lean, is now leaner. You didn't also increase fuel.Let's say you opened up your intake AND fuel, it would still run like crap because the stock exhaust couldn't handle the increase from the pre-burn side.Bottom line is, if you're looking for a performance increase, you will need to touch all points. More air, more fuel, free flowing exhaust. And only as much as the cylinder can handle. As another mentioned, this will increase sound and emissions, in addition to power. The manufacturers made a trade off, you will need to as well.Now ... a K&N, despite the marketing hype, isn't going to do much power wise. You'd need a dyno to see the slight uptick. And it isn't going to let in so much more air that the balance of air/fuel will be noticeably affected. So, what's the pro? Well, they're re-usable. Clean 'em, oil 'em, stick 'em back in. You won't be throwing away filters any more. If you're riding offroad, they will flow better, even with dirt and dust. And they're easy to clean on trail side.Another pro is that you will hear a slight increase in sound (if that's your thing), but it won't be that noticeable. Carb'ed engines may make a whistling sound with more air flowing. FE engines might be just a tad louder from the air flow. But it won't be anything you'd beat your chest over.Personally, I've had them. Liked them. Not sure the cost is worth it. On my KLR, I have the stock foam filter, which is also cleanable. So going the K&N route isn't really necessary. And there aren't any more ponies to be had from the engine, so I'm not even thinking of searching for increased performance.HTH
I accidently put oil in my moped gas tank, what should I do?
Put oil in the oil tank regardles of the oil mixed with gas. You didn't say what brand of moped- some of the later 2 strokes followed Suzuki's pattern of direct injection of oil to crank main bearing and rod bearing, premixed gas mixture only would not properly lubricated crankshaft and connecting rod bearing. Best bet is drain most of gas mix from gas tank, fill oil tank, put straight unleaded gas in gas tank and ride. at 4 oz to the gallon you have about a 32 to 1 mix in tank- good racing dirt bike mix but a probable plug fouler in moped. save the premix fuel for a chainsaw, weedwhacker, Lawnboy mower- or just put it in a pickup fuel tank to get rid of it.
WHat happens if you dont turn off your choke?
The choke causes your bike to run rich. (More fuel) when cold and as it warms up it don't need the choke. You continued to run rich(choke on) even when warmed up and probably fouled the spark plug or plugs depending how many cyls you have. So to start with I would put new spark plugs in it and it should start. No you didn't hurt it and there should be no damage.............md