callam_nffc wrote:I thought the whole principle of dropping gearing was to give you a lower ratio in 1st? Therefore giving you even more drive in first....?
With the argument of "just change down a gear" you can always just change up with a downsprocketed bike, im very rarely in sixth when out for a blast anyway
Well my answer to that is how much more drive do you need in 1st?
My bike, with the stock gearing will happily flip over backwards in 1st if you are in anyway hamfisted with the throttle, so how much more is needed?
I could also say that with stock gearing 1st isn't used much so why would I need a gear even lower?
Yes you can just change up 1 on a downed geared bike...but now how much have you spent to get the same performance while running 1 gear higher in the gearbox?
To keep things simple let's leave 1st and 6th out of this for a moment. You say you don't use 6th and I say your 1st is all but unusable with the down gearing.
Lets talk real world riding. What I am saying is if you could be put on the bike while it is already in motion. Let's say 80mph at that point could you tell the difference between a 15\43 geared bike in 4th and a 16\41 geared bike in 3rd with all other things being the same?
If you can tell the difference could you explain how? Close enough to be called the same final drive, same rpm, so to me you will get the same performance.
I guess I carry on so much about this because I am really trying to understand the other side of the gearing thing but it just doesn't make sense.
After showing mathematically that there is really nothing gained except swapping 6th for a lower 1st it usually goes to something like "it feels better to me" or " the way I ride. its better"
Which just feels like a cop out, sorry. To me it is the same as, if we use my 2 pints example, you saying you like the pint on the left and when told they are actually the same coming back with "The way I drink beer, it just tastes better"? Really...would you accept that as a valid answer?
Along with all that, lets go back to launching the bike off the line.
Can we agree that the limiting factory of any good bike launch is max acceleration while keeping the front wheel on (or at least close

) to the ground?
Also that once you lift the front wheel you stop accelerating as now the power is going to lift the front not drive the bike forward? This is why if anyone ever lofts the front wheel at the start of a race, they get left in the dust.
Now can we also agree that properly tuned (even bone stock but running correctly) VTR will happily loft the front end in 1st just on throttle even with stock gearing?
So if we are good so far, let me ask you this.....
If you had the 2 hypothetical same bike\same rider etc. with the only difference being one was geared 15\43 and the other 16\41.
Now run them from a standing start to top end, which bike would be in front and why?
Personally I would bet the farm on the stock geared bike, how can this be...... you know I have an answer.....
On launch the limiting factor is not how much power you have but how much throttle you can give it while keeping the front end down.
If you could slip the clutch there could be an advantage here but as it can not be done on these bikes so it is taken out of the equation.
What this does is, while the lower geared bike has a mechanical advantage the higher geared bike can negate that by using more of the available power A.K.A. give it more throttle.
So to me, off the line it will pretty much be a dead heat
Towards the top of first I can see the lower geared bike having a slight advantage for a fraction of a sec and then will have to shift first.
This is when the stock geared bike would pass as it would still be pulling the top of first.
Now what happens is the lower geared bike has just shifted to the same final drive ratio that the stock geared bike is topping out in which means it is running a higher MPH at this point.
So while things might see saw a little with the gear changes the lower geared bike will always be shifting up to the same ratio that the stock geared bike is topping out in.
This continues until the lower geared bike runs out of gears and the stock bike clicks one more and says bye-bye.....
So like I have said, I can't see an advantage anywhere and would really like to know if I have missed something.
I will stop boring you guys and leave you with one final though.
I understand you saying you rarely use 6th but I would reply that in the 17 yrs of running this bike I have never tried to downshift out of 1st feeling I needed more drive.
And yes I have run all the different gearing I have talked about not just trying to be a tw@ about it all

Loud pipes don't save lives, knowing how to ride your bike will save your life.