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I race with a 41t rear at some tracks. It essentially makes the bike build RPMs faster, you will carry more RPMs for any specific speed/gear, and you will have to shift gears more often.
On the street, absolutely unnecessary. No reason at all to do it. Twin motors have a small operating window anyway, and doing that would just make it smaller.
It will negatively affect your fuel economy, make the bike more wheelie prone, and force you to manipulate the gearbox more. Not to mention it makes the bike/throttle more sensitive and "twitchy"
You can try it to see if you like it, but on the street there is no sense in it.
On the street, absolutely unnecessary. No reason at all to do it. Twin motors have a small operating window anyway, and doing that would just make it smaller.
It will negatively affect your fuel economy, make the bike more wheelie prone, and force you to manipulate the gearbox more. Not to mention it makes the bike/throttle more sensitive and "twitchy"
You can try it to see if you like it, but on the street there is no sense in it.
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I use a 41 teeth rear sprocket since a few weeks, made the bike more ridable in tight hairpins. Now in second and nearly elbow down, before I had to ride the "pins" nearly in first gear very nervous on the throttle. Yes, it tends to wheelie more so turn the DWC a notch back.
With the 41 it lacks a bit of top speed (measured on the long straight of the Nordschleife), but who wants to drive 310 km/h, for me it's a never going back to the 39.
With the 41 it lacks a bit of top speed (measured on the long straight of the Nordschleife), but who wants to drive 310 km/h, for me it's a never going back to the 39.
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I've run a 41 tooth rear sprocket for about eight months now. My corner speed on track is just about right to benefit from the gearing on most tracks. It's very dependent on me being fast though. If I go to a new track where I am a bit slower I find that I am often stuck between gears, not fast enough in the corners to change to third but running out of second. Then after a few sessions I get quicker and it is perfect.
I'm not sure exactly why but contrary to what others say, I find the bike less wheelie prone in normal fast road and track use.
I recently bought a Renthall quick change rear sprocket carrier and 39,40 and 41 tooth sprockets but haven't started using them yet. The 41 tooth sprocket seems to work just about everywhere and my skills are borderline on being at a level where it is useful to change between the sprockets plus it takes time and organisation to change between them during a track day. I have a few three day Euro track holidays coming up so I'm thinking that will be the place to experiment with gearing and suspension settings.
I'm not sure exactly why but contrary to what others say, I find the bike less wheelie prone in normal fast road and track use.
I recently bought a Renthall quick change rear sprocket carrier and 39,40 and 41 tooth sprockets but haven't started using them yet. The 41 tooth sprocket seems to work just about everywhere and my skills are borderline on being at a level where it is useful to change between the sprockets plus it takes time and organisation to change between them during a track day. I have a few three day Euro track holidays coming up so I'm thinking that will be the place to experiment with gearing and suspension settings.
I had an increasing radius corner this past weekend that required 2nd gear to the limiter/3rd for a sec/back to 2nd with the 41. Worked awesome though with the revs and power up top - gave more than a few inlines a run for their money on the drag race to the next corner. Suckaaaasssssss!!!
Mine runs so bad below 6000 RPM that going up on the rear to 41 tooth helps it get in the zone quicker...
It does let you take off from a stop without having to use as much throttle or clutch... I don't care if I give up 5 ot 6 mph on the top end I will never go that fast enough to make any difference..
Speedy
It does let you take off from a stop without having to use as much throttle or clutch... I don't care if I give up 5 ot 6 mph on the top end I will never go that fast enough to make any difference..
Speedy
41 tooth
I have a 41 tooth sprocket, and I am very happy with the results. As previously stated, starts are easier with less clutch slipping and less throttle. When riding through a parking lot for example, your speed at idle is reduced. I took the bike to Deals Gap in April, and the drive out of low speed corners is much better. Not only do you benefit from the mechanical advantage, but in second gear coming out of some corners, you are that much closer to the sweet spot of the power band. I am not certain of this, but I believe that if the bike pulled the redline in sixth gear, it would be going 199 MPH. The magazines have tested and the actual top speed is 181 MPH. With a 41 tooth rear sprocket, the theoretical top speed is 189 MPH. I have not had the chance to do a top speed run as of yet, but someone has posted, and I think it is probably true, that he saw an increase in top speed with this sprocket. I do know for a fact that I recently raced a slightly modified Hyabusa, starting from 80 MPH, and pulled away from him all the way to 160 MPH. I think I get slightly worse gas mileage when riding hard, but in normal riding I find I can be in one gear higher than I was with the 39 tooth sprocket.
I have a 41 tooth sprocket, and I am very happy with the results. As previously stated, starts are easier with less clutch slipping and less throttle. When riding through a parking lot for example, your speed at idle is reduced. I took the bike to Deals Gap in April, and the drive out of low speed corners is much better. Not only do you benefit from the mechanical advantage, but in second gear coming out of some corners, you are that much closer to the sweet spot of the power band. I am not certain of this, but I believe that if the bike pulled the redline in sixth gear, it would be going 199 MPH. The magazines have tested and the actual top speed is 181 MPH. With a 41 tooth rear sprocket, the theoretical top speed is 189 MPH. I have not had the chance to do a top speed run as of yet, but someone has posted, and I think it is probably true, that he saw an increase in top speed with this sprocket. I do know for a fact that I recently raced a slightly modified Hyabusa, starting from 80 MPH, and pulled away from him all the way to 160 MPH. I think I get slightly worse gas mileage when riding hard, but in normal riding I find I can be in one gear higher than I was with the 39 tooth sprocket.
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It's the other way around @bobluc you lose top speed with larger rear sprocket. At Spa for the two laps I got without baffles before being black flagged I was hitting 185mph on the main straight and that was just before the redline.
I've not gone any quicker on the standard gearing but as a comparison I think I was perhaps 2-400 rpm below the redline at the same speed. The 1199R has the 41 tooth rear and an extra 500rpm and that goes a few miles an hour above the 186mph '--' speedo read out before redline which all seems about right. For the 3-5mph top end you lose it's a much bigger advantage having the push low down coming out of corners,etc.
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Oh man.
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Nobody, myself included, will be able to feel/notice the weight reduction of a couple of chain links. You could take a .... before riding, or not wear socks and underwear, and would get a better weight reduction.
These bikes make alot of torque, and that 14t front would be a really tight bend radius on the chain. It would work, but you would see accelerated wear. Not to mention it would make the throttle response very twitchy.
I'll go with Chaotic here. A lot of statements how it is night and day acceleration, better corner exit speed.
Comparing 39/41 gearing at 6000 rpm second gear in 60mh typical cornering speed at the same rpm difference is 2,6mph. Or 330 rpm difference at the same speed. I used to race for years, really can not say how that would make a world of difference. In most tracks, gearing was adjusted for top speed of that track. In 600cc you sometimes were making compromise IF that track had some specific corner(s) where you needed acceleration and gearing to fit there.
But superbikes, there were enough power to highside the bike in exit, no need to adjust gearing for exit speed. I am sure that corner exit acceleration for every member in this forum, is inadequate because of throttle usage more than gearing. Sorry.
Comparing 39/41 gearing at 6000 rpm second gear in 60mh typical cornering speed at the same rpm difference is 2,6mph. Or 330 rpm difference at the same speed. I used to race for years, really can not say how that would make a world of difference. In most tracks, gearing was adjusted for top speed of that track. In 600cc you sometimes were making compromise IF that track had some specific corner(s) where you needed acceleration and gearing to fit there.
But superbikes, there were enough power to highside the bike in exit, no need to adjust gearing for exit speed. I am sure that corner exit acceleration for every member in this forum, is inadequate because of throttle usage more than gearing. Sorry.
I have a lot of data from race S1000RR and I can say for fact, that engine NEVER gives out full power even in hands of a professional when exiting corner. DTC and all other acronyms are restricting that bike until it is almost vertical. -2 rear sprocket would not do a .... for that rider exit speed.
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Makes it more wheelie prone 
....
That is reason enuff just to do it,.....who cares about the rest.
....That is reason enuff just to do it,.....who cares about the rest
.
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More times that not, gearing selection is NOT about acceleration. It is about setting up the gear ratios so you maximize particular gears at particular places to maximize potential while minimizing gearbox manipulations.
The Panigale is fast enough. No, an additional 300 rpm won't help anyone break a lap record. BUT, that extra (or less) 300 rpm might make the difference between being able to finish a particular straightaway in 4th gear, rather than needing to go up into 5th gear for 50', only to immediately downshift again. Or being able to get the bike more upright finishing a corner before an upshift is necessary.
We change gearing at every track. But it isn't just about acceleration, it is about being able to place the shift points in the appropriate places on corner exits and in the straights.
The Panigale is fast enough. No, an additional 300 rpm won't help anyone break a lap record. BUT, that extra (or less) 300 rpm might make the difference between being able to finish a particular straightaway in 4th gear, rather than needing to go up into 5th gear for 50', only to immediately downshift again. Or being able to get the bike more upright finishing a corner before an upshift is necessary.
We change gearing at every track. But it isn't just about acceleration, it is about being able to place the shift points in the appropriate places on corner exits and in the straights.
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Makes it more wheelie prone
That is reason enuff just to do it,.....who cares about the rest
Because if the bike is doing a wheelie, it is losing forward acceleration.
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