Still learning the in's and outs of the bike and had a question... I've noticed in YouTube videos that people that drive sport bikes do these loud engine revs, it sounds like they are just throttling the whole RPM while holding the clutch in... Is that bad for the engine or is that ok? So you can hear what I'm talking about, in the below video forward it to 24 seconds and you'll hear what I'm referring to.
Are sport bikes the only ones that can do this or can our Vulcan S do it too without damaging the engine. I know it's a pointless action to even do but was just curious.
Generally speaking it's not good for an engine to be spun to high RPMs unless it's under a load. From the video the rider was trying to emphasise his anger, but even that's not a good idea, either.
I understand his anger part in it but it seems like a norm with sport bikes since I'm always hearing them do this on their bikes. Was just wondering if the same was possible with the vulcan s and if possible damage could occur and how they did it, just pull the clutch in and pull the throttle to the max and it will automatically do that high pitch engine skip..?
Nah, he didn't miss a shift. That's called a 'rev bomb' in that world. Usually used to announce ones arrival at a bike meet by said douches or to let someone know they done messed up. I've done it a few times in the latter sense...a horn, which on most bikes, is pretty weak...but a rev bomb with the full tone of a 140hp+ machine will perk their ears RIGHT up. I had a full exhaust on my bike (no cat, etc.) so that thing SCREAMED. If I rev bombed you, you know you did something REALLY wrong as I'm generally pretty easy going.
Unless you're doing it 4-5 times a ride and for 5-10 seconds each time, doing it once a month for 1-2 seconds won't hurt the bike. As others said, the rev limiter is there to prevent damage but it's better to ride an engine under load.
Nah, he didn't miss a shift. That's called a 'rev bomb' in that world. Usually used to announce ones arrival at a bike meet by said douches or to let someone know they done messed up. I've done it a few times in the latter sense...a horn, which on most bikes, is pretty weak...but a rev bomb with the full tone of a 140hp+ machine will perk their ears RIGHT up. I had a full exhaust on my bike (no cat, etc.) so that thing SCREAMED. If I rev bombed you, you know you did something REALLY wrong as I'm generally pretty easy going.
Unless you're doing it 4-5 times a ride and for 5-10 seconds each time, doing it once a month for 1-2 seconds won't hurt the bike. As others said, the rev limiter is there to prevent damage but it's better to ride an engine under load.
I used the Cobras on my Voyage like a horn regularly. Very different sound though.
Correct me if I'm wrong; but the bike in the video doesn't sound like a twin.
I'm pretty sure you'd have to have a VERY high revving twin to make a 'rev bomb' sound good.
Not sure about the Vulcan S; but most cruiser twins are going to sound like they're in the process of self destructing rather than expressing displeasure with someone else.
Long stroke twins blip the throttle to get that power pulse combustion stroke to bark like a big angry dog.
My Rocket has aftermarket pipes, but being a triple doesn't have the same bark as a big twin or the RPMs to make a good rev bomb. I have a air horn though, so all's good.
My FJR has the factory exhaust and I'm happy with the quietness; have the PIAA twin horns on it though so all's good there too.
So, I'm curious if I'm right. To get a good rev bomb you're going to need a lot more combustion strokes than a twin at 6-7k rpm...correct???
Its called stupidity and they DO IT to impress whoever is within earshot!
WHY do you think all the cruiser with the straight pipes always hit the throttle a little at a light?
So they and everyone around can hear their bike. Dont need to do it but they "need" to hear it.
I just laugh.
You can easily flash the same tune as a Ninja 650 using a PCV but it won't run the same and will most likely run worse. Even though it's claimed that they have the same engine, they don't.
Different pistons, head, cams and most importantly, a heavier crank.
On some models you can raise the rev limiter using the PCV but with a heavy crank it's not a good idea.
Ninja is able to spin up much higher revs due to a lighter crank and in doing so it's able to generate more power and torque, but to do this you need to wring it's neck!
The Vulcan S has more take off power as it peaks earlier at a lower rev range.
So I rev bombed the FJR.
Not really impressed. It has a two phase rev limit. I think at 9k it shuts down fueling to two cylinders then somewhere around 10 it shuts down the other two.
It's not as bad as I thought it would be but really just a poor mimic of the bike in the video.
Even if I had fancy race bike with 4 cylinders and a high rev limit I don't think I would do it as practice.
I will admit to enjoying watching someones eyes get the size of a dinner plate when I'd make the Cobras bark after them drifting into my lane. The wolo bad boy had done the same thing for me on the Rocket.
So, I don't look down on those that use it like that on a bike with the right set-up. It's just not for me.
Scott
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