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Author Topic: Will bike motors increase in size indefinitley?  (Read 691 times)

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Offline letsgofishing

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Will bike motors increase in size indefinitley?
« on: February 12, 2009, 01:15:52 pm »
What's the limit to a DS bike engine? 10 or so years ago, the biggest DS bikes were in the 750-1000cc range. Weren't we happy with the amount of power then? Did we think they under-performed? Take BM: 1100, 1150,1200 - what's next in 5 years time - 1500cc with 150hp?KTM seem to be heded along the same path as well. There has to be a limit to the size/weight of a DS bike eventually -  what will the marketing divisions do then? - no more "bigger is better".
I'd like to see a smaller DS bike resurgence - 450,600,750cc max. Just look at the power that the 600cc class of crotch rockets put out combined with a low weight - surely this is the way forward?
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Offline Tr0jan

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Re: Will bike motors increase in size indefinitley?
« Reply #1 on: February 12, 2009, 01:20:58 pm »
What's the limit to a DS bike engine? 10 or so years ago, the biggest DS bikes were in the 750-1000cc range. Weren't we happy with the amount of power then? Did we think they under-performed? Take BM: 1100, 1150,1200 - what's next in 5 years time - 1500cc with 150hp?KTM seem to be heded along the same path as well. There has to be a limit to the size/weight of a DS bike eventually -  what will the marketing divisions do then? - no more "bigger is better".
I'd like to see a smaller DS bike resurgence - 450,600,750cc max. Just look at the power that the 600cc class of crotch rockets put out combined with a low weight - surely this is the way forward?

Dunno, think bmw might be going both, look at the new 800gs = 62kw, the 1150gs = 62kw. Torque might be a problem on "smaller" engines.
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Offline Pistonpete

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Re: Will bike motors increase in size indefinitley?
« Reply #2 on: February 12, 2009, 01:31:05 pm »
It certainly looks that way. Extra power to carry the extra weight? Cars & bakkies the same thing. Remember a short while back it was unthinkable to run a 4.0 in a bakkie....now every brand has one! What energy crisis....do they know something we dont? :)
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Offline sillystunt

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Re: Will bike motors increase in size indefinitley?
« Reply #3 on: February 12, 2009, 01:32:03 pm »
i think that europe will be first to impose a 100kw limit on bikes.they have been trying too for years,its gonna happen soon.
already its a exercise in futility to have more power than that in most places on the planet.
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Offline Kawasefi

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Re: Will bike motors increase in size indefinitley?
« Reply #4 on: February 12, 2009, 01:41:35 pm »
i think that europe will be first to impose a 100kw limit on bikes.they have been trying too for years,its gonna happen soon.
already its a exercise in futility to have more power than that in most places on the planet.

There is no dual purpose bike with more than 100kw anyway...
 

Offline Buller

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Re: Will bike motors increase in size indefinitley?
« Reply #5 on: February 12, 2009, 01:42:53 pm »
i think that europe will be first to impose a 100kw limit on bikes.they have been trying too for years,its gonna happen soon.
already its a exercise in futility to have more power than that in most places on the planet.

It's already in place in one European country with a limit to 106bhp.  So the new 990 Adventure R is remapped to bring down 115bhp to 106bhp.
« Last Edit: February 12, 2009, 05:06:34 pm by Buller »
 

Offline Wagter

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Re: Will bike motors increase in size indefinitley?
« Reply #6 on: February 12, 2009, 04:27:29 pm »
I just read today that the '09 Kawa ZX-6 pumps out around 94 kW!
The torque might not be earth shattering but that is a lot for a 600cc engine.
Hopefully the DS bikes will follow the soopabike trend and start getting lighter with more powerfull but smaller engines.

Maybe we should try and put a ZX-6 motor into a KLR and freak out the KTM guys!  :pot:
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Offline Kawasefi

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Re: Will bike motors increase in size indefinitley?
« Reply #7 on: February 12, 2009, 04:39:13 pm »
Yep, a ZX-6 makes 3 times more power than a KLR but still has only about the same peak torque...at much higher revs.  Manufacturers who have been chasing bhp figures with their superbikes will have to concentracte more on torque delivery if the horsepower bans become more widely enforced.

The 106bhp limit sounds a bit more realistic to me than a 100kw limit, only the 1000cc + superbikes (maybe the 750 Gixxer too) makes more than 100kw. If it's106bhp then even 600cc superbikes will have to be restricted.
 

Offline Ama ride ride

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Re: Will bike motors increase in size indefinitley?
« Reply #8 on: February 12, 2009, 04:54:12 pm »
DS bikes need torque low down. Easies way to get that is engine size.

You need Kw for speed.
Torque to tractor over rocks etc.

So a superbike engine is a but useless in a DS bike.

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Offline Buller

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Re: Will bike motors increase in size indefinitley?
« Reply #9 on: February 12, 2009, 05:18:21 pm »

So a superbike engine is a but useless in a DS bike.

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Offline Poffmuis

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Re: Will bike motors increase in size indefinitley?
« Reply #10 on: February 12, 2009, 05:35:34 pm »
tell that to this guy

 

Offline Poffmuis

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Re: Will bike motors increase in size indefinitley?
« Reply #11 on: February 12, 2009, 05:47:03 pm »

There is no dual purpose bike with more than 100kw anyway...

Moto Morini 1200 Scrambler
138.12 HP (100.8 kW)) @ 8500 RPM :evil6:
« Last Edit: February 12, 2009, 05:47:46 pm by Mungkeeey »
 

Offline Kawasefi

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Re: Will bike motors increase in size indefinitley?
« Reply #12 on: February 12, 2009, 05:51:12 pm »

There is no dual purpose bike with more than 100kw anyway...

Moto Morini 1200 Scrambler
138.12 HP (100.8 kW)) @ 8500 RPM :evil6:

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Offline topbox

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Re: Will bike motors increase in size indefinitley?
« Reply #13 on: February 12, 2009, 07:44:11 pm »
bike sizes increase continuously and then the manufacturer will bring in a new smaller model and if successful grow that

eg: a polo is what a golf  used to be. A Golf is now into Audi territory.

(excluding the citigolf which is like the slow retarded stepchild  :pot: )
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Offline letsgofishing

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Re: Will bike motors increase in size indefinitley?
« Reply #14 on: February 13, 2009, 07:04:33 am »
I reallly don't see how the size of the engine can increase indefinitely -
can you REALLY se a 2000cc DS bike that is managable?
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Offline Ama ride ride

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Re: Will bike motors increase in size indefinitley?
« Reply #15 on: February 13, 2009, 07:06:50 am »
I reallly don't see how the size of the engine can increase indefinitely -
can you REALLY se a 2000cc DS bike that is managable?

With a low range switch it would be purrrfffect :laughing4:
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Offline Boertjie

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Re: Will bike motors increase in size indefinitley?
« Reply #16 on: February 13, 2009, 06:13:49 pm »
We will see more growth in cc 's on DS bikes. BM's newest roady is already a 1300. We will probably see something more for the big GS... but I think that there is a limit where the additional weight will make true DS less effective and therefore I do not believe that the growth will be much.

I already think that the next focus for the DS bikes will be variable valve technology to optimize both torque and output. This could actually lead to smaller engines with significantly better power curves. I would not be surprised if we see small turbo diesel engine in a bike some time in the not too distant future.
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Offline RobC

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Re: Will bike motors increase in size indefinitley?
« Reply #17 on: February 15, 2009, 03:41:16 pm »
I would not be surprised if we see small turbo diesel engine in a bike some time in the not too distant future.
Diesel is already being developed for the US military... the following spring to mind;
http://www.dieselmotorcycles.com/
http://en.wikipedia.org/wiki/Diesel_motorcycle
Diesel is the way to to go if you want torque and low fuel consumption, you also get the added bonus of a very robust engine with what should be a longer life. The technology is light years from what it was 10 years ago as well.
 

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Re: Will bike motors increase in size indefinitley?
« Reply #18 on: February 16, 2009, 08:49:02 pm »
Jip, diesel is very nice for torque. Problem might be high vibration

On the other hand, if you join 2 KLR engines on the same crank in a 90 degree configuration............. Keep carbs for simplicity. Should be a very nice touring bike. With the right cam, may run like a Harley, a beat every lamp post
 

Offline Fudmucker

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Re: Will bike motors increase in size indefinitley?
« Reply #19 on: February 16, 2009, 10:13:52 pm »
Triumph already has a 2300cc  road bike.
Big bore Jap tourers top 1700cc.
Screaming Eagle V-twin motors are just under 1600cc
Even the Mammoth Munch in the early Seventies had a transverse 1500cc NSU motor.


Engine size gives lots of low-end torque - more usable in a DS machine.
Give me lotsa torque, good ground clearance, low nett vehicle mass and a low seat height and it'll be on my shopping list... :ricky:
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