2006-06-16 04:40:30 · 19 answers · asked by Anonymous in Cars & Transportation ➔ Motorcycles
To clarify some of the correct answers above ... most bikes are air-cooled and designed to operate in "warm" condition. When they are still cold, they do not run well, and can stall easily.
It is necessary to run most air-cooled bikes for several minutes at idle before they will reach optimum operating temperature.
If it is a fluid-cooled bike, they're just showing off, or functioning from habit.
BTW, some bikes have transmissions that require the engine to be turning over at a certain RPM rate in order to go into first gear, so you will hear some riders give their bikes a little pop on the throttle when the light turns green.
My .02 Ameribucks, unadjusted for inflation since 1959.
2006-06-16 06:38:38 · answer #1 · answered by Grendle 6 · 0⤊ 0⤋
To keep the engine from stalling out (particularly with bikes where the idle is set too low, say 800RPM or less), and additionally to give the engine time to warm up. Engines are made from a variety of components of different metals, which all heat up at different rates. Bringing a bike up to highway speeds before giving the motor a chance to warm up can blow gaskets and warp rocker boxes and heads. That being said, you can keep your bike at idle without cracking the throttle wide open every two seconds and making a jackass of yourself.
2006-06-16 08:52:05 · answer #2 · answered by armored_dillo 3 · 0⤊ 0⤋
jake & frogprincess are the only ones that gave sensible answers. I don't know a single person that rides and knows anything about bikes, who revs their engines to lubricate it. People that just ride without thinking, rev their engines because they think it makes them look cool (I'm a biker, keep out of my way).
-The # 1 reason is to prevent the motor from stalling when letting out the clutch. Things in motion tend to stay in motion. When the engine is spinning and you let out the clutch, it's most likely to keep spinning.
-If the engine is just idling when the clutch is let out, it takes the engine a lot of force just to get the bike moving.
-Go to any motorcycle race or automobile drag race. While sitting at the starting line waiting for the flag to drop, the vehicles are reving at top RPMs. When they let out the clutch, the engine is spinning full blast and just GOssssss!!!!!!!!
My answer was for why people rev their engines while sitting at a traffic light.
If you've just started your bike, reving the motor helps to warm it up faster.
2006-06-16 05:10:42 · answer #3 · answered by guardrailjim 7 · 0⤊ 0⤋
When you first start you bike, it's wise to let it idle for a few minutes so that the oil warms up and is flowing freely through the engine.
If you're asking why they roll the throttle at traffic lights, then take off..........it's so that they can think they look cool to everyone around them who really couldn't care less, burn more of that $3.00 a gallon gas, and heating up their engine since they're not getting any cooling, and wear it out quicker.
2006-06-16 10:57:14 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Revving the engine up heats it up.
A hotter engine is more performant, and is less prone to stalling.
It also lubrifies all the needed areas before use, thus reducing friction damage (there's no difference ON THE SPOT, but in the long run your engine stays in better condition).
2006-06-16 04:44:39 · answer #5 · answered by Anonymous · 0⤊ 0⤋
It is really easy for cars not to notice bikes. When a motorcyclist revs up it lets everyone know where they are, so next time you think they are ruining your hearing remember they might be trying to save their *** from the pavement.
2006-06-16 04:52:35 · answer #6 · answered by Blue 2 · 0⤊ 0⤋
That'll be frequently Harley and cruiser bikers who endulge in the sound of their loud pipes or their piece of junk that calls for the engine to warmth up slightly. I vacation a recreation bike and fairly a lot only enable the bike warmth up 30-60 seconds and take off. maximum different recreation bikers I see do an similar and do not typically rev up their engines till now starting up up or enable them to idle for a lengthy time period. actual, my vendors guide on my Ninja ZX6 warns no longer to allow the egine to idle more desirable than 5 minutes.
2016-10-31 00:04:36 · answer #7 · answered by ? 4 · 0⤊ 0⤋
Yeah, the chicks really dig it when I rev my engine.
(well, actually I bet they do!)
Yes, it needs to be warmed up and idling high enough. If you are reving it while you are taking off in first to keep it idling high enough, you are going to stall or lurch when the clutch reaches the friction zone perhaps.
I guess sometimes we do it to get OUR motor running! You need to make sure you are ready, 'in the zone'. It's a crazy game of survival out there.
2006-06-16 07:47:41 · answer #8 · answered by ridethestar 5 · 0⤊ 0⤋
Some do it just to show out but others do it to warm up the engine quicker. A cold engine idles rough and is more jerky on a motorcycle.
2006-06-16 08:15:56 · answer #9 · answered by N H 1 · 0⤊ 0⤋
mostly so the unrestricted exhaust will deffen the person it the car next to em and should be a law against it, will they pay for your hearing loss , take the guy on the gold wing he just takes of no noise that's class, these other guys want to be noticed look at me i am a want to be what ever
2006-06-16 04:46:51 · answer #10 · answered by Mechanical 6 · 0⤊ 0⤋