take two similar (naked) bikes one a 600(ish)cc and one a 1000(ish)cc for example
Hornet Vs CB1000R
Street Triple Vs Speed Triple
FZ6 Vs FZ1
etc
would you think that the 1000cc would have more power/grunt low in the revs than the 600s?
Or would you need to rev the 1000cc engine even more?
It all depends on the state of tune P - e.g. a 1000cc engine IL4 is theoretically able to give more of everything (torque, mid-range, top end) than an equivalent IL4 600 simply because it is a larger capacity engine - on the other hand if the 600 is specifically tuned for mid-range and the 1000 is tuned to make all it’s power higher up the rev-range - then the 600 could be making more power in the mid-range than the 1000.There are people on here that know a sh1tload more about engines than I do - and so I defer to their opinion - but I think that is basically what it boils down to - tune.
As above.
1000 should give more of everything over 600, but the low end torque is more a characteristic of the type of engine rather than size.
That’s why, even though it’s a well made tool, I didn’t get a CBF1000 but a TDM900 instead, the V-Twin delivery was just more engaging and better low-down grunt.
Not had personal experience but I thought this was why the triumph triple is well liked as it sorta straddles the two and gives benefits of both Twin & IL4.
thats why i am referring to nakeds and not sportsbikes as they are usually tuned for lower end power…
With two engines similarly tuned the 1000 will give more of everything…There ain’t no substitute for CCs;)
Hornet Vs CB1000R
Street Triple Vs Speed Triple
FZ6 Vs FZ1Yes Pan - all these bikes have similar power charachteristics (tuned for strong mid-range with less emphasis on top end than their sports bike equivalents).
And the 1000cc bikes will have a wider stronger spread of low-down and mid-range power than the six hundreds.
cool that does sounds logica,
for some reason i thought that the 1000cc would be more revy (revier?) than the 600s :blink:
The opposite will be true … the 600s will require more revs to achieve similar power. However, if you give the 1000s more revs, you will get loads of power.
There is a bit more to it than revs and CC’s…engines are tuned in a number of ways and its to do with carb valve and inlet sizes…along with of course revs and cc’s
In an ideal world given the fact that four cylinder engines are happiest at about 14-15k revs…maximum…and that you have the same set-up in terms of advance (spark advance) fuel/air mixture revs and valve openings the bigger engine will generate more torque and therefore power at every setting…
However engines are tuned to give different performance at different settings…and also for different tasks…some have it all at maximum revs…some mid range, some at very low revs…
single cylinder engines give excellent torque, and the bigger the capacity the bigger the torque…all typically at relatively low revs
twins, v or inline offer good torque and better rev range and are a smoother ride than a single
Triples fired correctly should be the ideal balanced set-up…but it doesnt always work like that…depends on the length of the crank and the bore and stroke…and many other issues
Four pots have become the norm as they offer the best in revs, power and crank size on an inline engine…and within the confines of a motorbikes frame…
I could go on for ever but that is just a bit of it… in reality each bike has its special characterisitics depending upon its design…and today electronics and hydraulic valves and other clever stuff can make the engine act very differently to its typical design characterisitics…ie the Ducati V-twins…
Exactly what I said:)
A 1000cc+ will have gobs of power from tickover, and you tend not to notice things like going uphill/having a pillion as much. Smaller engines have to be revved more to get the same effect.
For practical purposes, both are probably overpowered, it just depends whether you like revving the nuts off your bike, or if you like a smooth, quiet riding experience on a big bike where you can get away with doing almost no shifting and just puttering away in low rpms.
Personally, I like cruising at 50mph in 6th at 2500rpm. I’m so quiet that if people hear me coming it’s already too late… bit like a stealth bomber xD
In Germany we have a saying, “There is no substitute for displacement, except more displacement!” 
??
the TDM has off-set crank pins in order to emulate the power delivery of a V twin even though it is an inline twin
Yes, IIRC its a 270 degree crank or something like that. A bit like a Big Bang engine:w00t:
Hi Panagiotis
I have just upgraded my CBF600 to a CBF1000 and can confirm what the other guys have said. The new bike pulls much faster at much lower revs than the 600. Got it yesterday and so have only had the chance to do 25 miles in heavy traffic, so I haven’t really got it 6,000 RPM yet. On the old bike I was using pretty much the full rev range. This means a much smoother ride with the large engine.
Sorry, thanks for correcting this it is a parallel twin not V, but feels pretty similar to a V on power (without the vibes) due to the firing order stuff I don’t begin to understand. 
thanks for this! 
Yeah, agree on the CBF1000… on my CBR 1100 XX you could install a rev limiter at 5000 RPM and it would still be more than usable for all everyday situations. (The real rev limiter is just under 11000 RPM.)
Overkill? Yeah. Fun? Of course. And in the wet and at slow speeds? Just shift early… and pull the clutch in before you hit any dodgy road surfaces.
