Big Bang on a production bike

I'm wondering how long it will be before one of the big four comes out with something. Even though you probably would not need it on a streetbike. Seems like it would be a huge selling tool.  

I don't see it happening ever... you really only need it on extremely high power bikes (200+whp), and for a street bike, I'd think the lower rev range would be somewhat rough.  

I agree with you but I also think we did not really need slipper clutches, and even to some extent upside down forks, radial mounted brakes the list just keeps growning. Don't get me wrong I love all of these things but I think we could get along just fine without them.  I think that a lot of this type of stuff is "trendy"  

I brought up this subject on a another board. I think it's inevevitable (sp?). Liter bikes are only getting more power, and are already being made more "rideable" by making 1st gear really tall. It would be a great selling tool if it worked. In British Superbike last year, one team made a big bang R1. This one didn't have two cylinders firing simultaneosly though. It was more like two sets of one-two punches with a set of two cylinders firing miliseconds apart, a pause, then the other set.  

I think you are right, My dad is in the snowmobile industry. He is building a big bang engine right now with the RX1. He's doing it with no real knowledge of motogp. Should be intersting to see how it works. Traction is the main issue with these things.  

Tell him to be carefull. It's more than just altering firing order. You're subjection all the internal miving parts to twice the force they were designed to withstand. Broken cranks come to mind....

Everything has to be rethought. If he's not an engineer, he's probably just going to spend a lot of money on something that doesn't work.  

What is big bang exactly?  

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Tell him to be carefull. It's more than just altering firing order. You're subjection all the internal miving parts to twice the force they were designed to withstand. Broken cranks come to mind....

Everything has to be rethought. If he's not an engineer, he's probably just going to spend a lot of money on something that doesn't work.

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doughboy.  Big Bang is a firing system in the engine that has two cylinders firing at the same time.  Instead of having the four firng in seperate orders.  Not sure of the power it creates, but I know that Yamaha tried it out before they settled on their current M1 in motogp.  I have read that it sounds amazing too.  

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doughboy.  Big Bang is a firing system in the engine that has two cylinders firing at the same time.  Instead of having the four firng in seperate orders.  Not sure of the power it creates, but I know that Yamaha tried it out before they settled on their current M1 in motogp.  I have read that it sounds amazing too.

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To add to that…

It does rob some power, but the trade off is supposed to be worth it in some applications, such as MotoGP. They already have more power than they can use, traction is the problem at levels approaching 250 hp. This is what a big bang can help with. It works on the same premise as a v-twin in Superbike. Even though they have less power than the inlines, they can still compete because they can get on the gas sooner. A v-twin, and a big bang, offer a pause between pulses of power. That minuscule pause offers just enough time to allow the tire to “re-grip”….basically.

Oh, and they sound the nuts!!!  

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In British Superbike last year, one team made a big bang R1. This one didn't have two cylinders firing simultaneosly though. It was more like two sets of one-two punches with a set of two cylinders firing miliseconds apart, a pause, then the other set.

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In British Superbike last year, one team made a big bang R1. This one didn't have two cylinders firing simultaneosly though. It was more like two sets of one-two punches with a set of two cylinders firing miliseconds apart, a pause, then the other set.

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Here is a bit of news about the BSB R1

They can't change the crankshaft in that series, which leaves just a couple of options for changing the cams and firing two cylinders at the same time.

AT

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Yeah, I beleive they staggered the firing order slightly to lessen the punch. Kind of a "medium-bang"  

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Yeah, I beleive they staggered the firing order slightly to lessen the punch. Kind of a "medium-bang"

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Yeah, I beleive they staggered the firing order slightly to lessen the punch. Kind of a "medium-bang"

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They couldn't stagger it because they had to use the stock crankshaft, and that's one of the reasons they had trouble with it. The only way to do it would be to have the inner or outer cylinders fire at the same time (as opposed to 360 degrees apart). You can do that by just changing the ECU and camshafts.

AT

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I knew it was something like that, my memory failed me a little. It was cylinder 1 then 2-3 together then 4.

I think they said the actually gained power too.

I'd really like to see, and hear, a production one.