Rear Sprocket

Tony Rachid · May 9, 2020

how many teeth less on the rear gear wheel v4 should i put to increase my maximum speed ... without losing strength

Araitim · May 9, 2020

This has a bunch of info. Plug in your bike info and it will show you all kinds of graphs and how each gear will perform with stock then you can compare side by side graphs with what you are interested in getting. Pay attention to the tiny links within the site . It is a very good page with a ton of info including chain length needed with each gearing
https://www.gearingcommander.com/

cycler · May 10, 2020

Tony Rachid said:
how many teeth less on the rear gear wheel v4 should i put to increase my maximum speed ... without losing strength

What are you exactly trying to achieve here? More top end? By going down teeth you will lose lower end and mid range pick up but gain more speed and power in the top end which you will never really even get to in my opinion if you dont track the bike. What you will get if you go down in teeth is taller gearing more which more closely matches rear wheel speed to transmission shaft speed. So this will lower engine RPMs allowing you to actually shift less and the bike will feel smoother. You will also get higher potential top speed and improved fuel economy. But youre trading off for reduced throttle response and acceleration. Higher gearing will have a lower gear ratio number than your current setup.

If you went up 2 teeth on your rear sprocket for example like I did on my Ducati 1299, S1000RR and S1000R as have many others on their bikes ( My 1299 came with a 39T rear sprocket, my S1000RR came with a 45T rear sprocket and my S1000R came with a 44T rear sprocket. I went up 2 teeth on all 3 bikes. However before going from a 39t rear sprocket to a 41T rear sprocket on my 1299 I listened to someone on this forum who said they loved how a 42T rear sprocket felt on their 1299. Although they said to be careful because with a 42T rear sprocket there was no point in even having wheelie launch control. I found out what he meant when I installed the 42T rear sprocket and quickly learned Im no Motogp rider, WSBK rider and not even close to an amateur racer even though I track my bikes at least 10 times a year. My front end would come up in 1st, 2nd , 3rd and even 4th gear going up 3 teeth. I couldnt figure out how to ride the bike. Not that I couldnt ride it, I could but I didnt enjoy it. So 3 weeks later I went to a 41T rear sprocket on the 1299. Yes the front feathers the road on take off and is a beast but I enjoy and love it.

That being said. Going up teeth lowers the gearing. The lower gearing will give more rotation from the rear wheel for each spin of the countershaft. This in turn raises the engine RPMs which will improve throttle response for faster acceleration. The trade off is lower top end speed and lower fuel economy but not to the point where you will say omg look how much gas my bike is using. And with lower gearing, the ratio will be a higher number.

RickD996 · May 10, 2020

Does the bike rev out in top gear? If you are hitting the limiter, you could try going down one tooth on the rear to increase potential top speed. Repeat until you no longer hit the limiter.

If the bike won't hit the limiter in top gear, then add a tooth to allow the bike to get to the limiter. You'll have to check if it's actually any quicker than stock gearing not hitting the limiter. Although, theoretically, you should get there quicker.

I'm not sure if the bike is restricted electronically?

DucatiKev · May 10, 2020

cycler said:
If you went up 2 teeth on your rear sprocket for example like I did on my Ducati 1299

listen to @cycler, he knows this. Plus he’s got all the parts to make it happen.

he’s right tho, nothing is gained without sacrifice. Some forum members have specific gearing for specific tracks because shaving seconds off lap times is achievable with these mods.

RickD996 said:
Does the bike rev out in top gear? If you are hitting the limiter, you could try going down one tooth on the rear to increase potential top speed. Repeat until you no longer hit the limiter.

If the bike won't hit the limiter in top gear, then add a tooth to allow the bike to get to the limiter. You'll have to check if it's actually any quicker than stock gearing not hitting the limiter. Although, theoretically, you should get there quicker.

That’s genius... to the Autobahn

cycler · May 10, 2020

RickD996 said:
Does the bike rev out in top gear? If you are hitting the limiter, you could try going down one tooth on the rear to increase potential top speed. Repeat until you no longer hit the limiter.

If the bike won't hit the limiter in top gear, then add a tooth to allow the bike to get to the limiter. You'll have to check if it's actually any quicker than stock gearing not hitting the limiter. Although, theoretically, you should get there quicker.

I'm not sure if the bike is restricted electronically?

RickD996 I think what he is trying to achieve is gain as much acceleration as possible. I dont think he cares what the top end speed is as long as his low and mid range pick up is a beast. IMO he is not a club racer or races on a team. This guy wants what Maverick wanted. He has a need for speed. Therefore he would be willing to sacrifice 10-15 mph off his top end speed. As well as sacrifice top end power to achieve all his power at low to mid range up to 140 to maybe 145mph. Tony Rachid...hit me up and Ill take care of you like i have with other forum members and we can talk about giving you the power you need as well as making the rear sprocket, sprocket holder, hub flange, sprocket bolts, flange bolts look pretty as well as taking it where you want it to be.

I went from a 39t rear sprocket to the 41t rear sprocket with cnc racing sprocket, cnc sprocket holder, driven front 15t front sprocket, CNC racing black hub flange and EK 3d chain. But then powder coated my wheels spanish gold. Then replaced my black cnc racing hub flange with a silver AEM D-SEI hub flange that i powder coated spanish gold. replaced the metal spring on both sides with black and replaced the metal spacer on the right side with black. And also replaced the front and rear CNC Racing axle protectors with the T-rex magnetic axle protectors. You can see the difference in the axle protectors with the black cnc racing hub flange and the gold hug flange. Best thing i ever did. I installed the magnetic axle protectors on my s1000r last april and replaced my axle protectors on my S1000RR and 1299 with the t-rex racing magnetic ones last month.

DucatiKev · May 10, 2020

cycler said:
RickD996 I think what he is trying to achieve is gain as much acceleration as possible

idk cycler he said

Tony Rachid said:
increase my maximum speed ... without losing strength

He’s from Brazil. My friends from there like to go fast. He might want a 240mph Ducati???

it may take 17 minutes to get there but it might be doable.

I’d rather get the gearing setup to get from 45-160mph as quick as possible even if it means the bike is at redline in 6th at 180mph.
trouble is keeping the front wheel down.

tony, are u looking for more top speed without ruining acceleration too bad?
Or is it quicker acceleration you desire?

stan1 · May 10, 2020

Tony,

Check out this website; Gearing Commander ⚙ It will provide multiple options with gearing as to what you are looking for.

Tony Rachid said:
how many teeth less on the rear gear wheel v4 should i put to increase my maximum speed ... without losing strength

Tony Rachid · May 10, 2020

cycler said:
What are you exactly trying to achieve here? More top end? By going down teeth you will lose lower end and mid range pick up but gain more speed and power in the top end which you will never really even get to in my opinion if you dont track the bike. What you will get if you go down in teeth is taller gearing more which more closely matches rear wheel speed to transmission shaft speed. So this will lower engine RPMs allowing you to actually shift less and the bike will feel smoother. You will also get higher potential top speed and improved fuel economy. But youre trading off for reduced throttle response and acceleration. Higher gearing will have a lower gear ratio number than your current setup.

If you went up 2 teeth on your rear sprocket for example like I did on my Ducati 1299, S1000RR and S1000R as have many others on their bikes ( My 1299 came with a 39T rear sprocket, my S1000RR came with a 45T rear sprocket and my S1000R came with a 44T rear sprocket. I went up 2 teeth on all 3 bikes. However before going from a 39t rear sprocket to a 41T rear sprocket on my 1299 I listened to someone on this forum who said they loved how a 42T rear sprocket felt on their 1299. Although they said to be careful because with a 42T rear sprocket there was no point in even having wheelie launch control. I found out what he meant when I installed the 42T rear sprocket and quickly learned Im no Motogp rider, WSBK rider and not even close to an amateur racer even though I track my bikes at least 10 times a year. My front end would come up in 1st, 2nd , 3rd and even 4th gear going up 3 teeth. I couldnt figure out how to ride the bike. Not that I couldnt ride it, I could but I didnt enjoy it. So 3 weeks later I went to a 41T rear sprocket on the 1299. Yes the front feathers the road on take off and is a beast but I enjoy and love it.

That being said. Going up teeth lowers the gearing. The lower gearing will give more rotation from the rear wheel for each spin of the countershaft. This in turn raises the engine RPMs which will improve throttle response for faster acceleration. The trade off is lower top end speed and lower fuel economy but not to the point where you will say omg look how much gas my bike is using. And with lower gearing, the ratio will be a higher number.

I seek to increase the final speed ... I had an s1000rr with 3 fewer teeth on the rear sprocket and it reached 318 km / h ... I want to overcome that speed with the v4.

Tony Rachid · May 10, 2020

DucatiKev said:
idk cycler he said

He’s from Brazil. My friends from there like to go fast. He might want a 240mph Ducati???

it may take 17 minutes to get there but it might be doable.

I’d rather get the gearing setup to get from 45-160mph as quick as possible even if it means the bike is at redline in 6th at 180mph.
trouble is keeping the front wheel down.

tony, are u looking for more top speed without ruining acceleration too bad?
Or is it quicker acceleration you desire?

I seek final speed. will she be able to push a 39-tooth toothed rear wheel?

cycler · May 10, 2020

Tony Rachid said:
I seek final speed. will she be able to push a 39-tooth toothed rear wheel?

what year is your V4?

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cycler · May 10, 2020

Tony I sent you a PM

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cycler · May 10, 2020

since he will be going 3 teeth down the gearing will get taller. So for example if someone with a stock rear 42t sprocket was revving at 9500rpms at a certain speed the 39t rear sprocket on Tonys bike would be revving at a lower RPM allowing him to continue his acceleration before he switche gears. im not exactly sure what rpm he would be at because I didnt do any calculations. And dont know the speed or what gear he would bebin since I was just using an example. But If I had to guess I would say he would be anywhere between 8500 to 9000 rpms

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DucatiKev · May 10, 2020

cycler said:
since he will be going 3 teeth down the gearing will get taller. So for example if someone with a stock rear 42t sprocket was revving at 9500rpms at a certain speed the 39t rear sprocket on Tonys bike would be revving at a lower RPM allowing him to continue his acceleration before he switche gears. im not exactly sure what rpm he would be at because I didnt do any calculations. And dont know the speed or what gear he would bebin since I was just using an example. But If I had to guess I would say he would be anywhere between 8500 to 9000 rpms

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will it be a slug off the line -3 rear?

cycler · May 10, 2020

I just looked up the stock front and rear sprockets on the Panigale V4S. The front has 16T and rear has 41T. Unless Ducati changed it on the base or his model year. So if he wanted to down 3 teeth he would need a 38T rear sprocket.

It wont be a slug. But it wont be a beast take off. Due to the higher gearing his top end will increase. If he drag racing the bike this is the best solution for him.

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RickD996 · May 11, 2020

cycler said:
I just looked up the stock front and rear sprockets on the Panigale V4S. The front has 16T and rear has 41T. Unless Ducati changed it on the base or his model year. So if he wanted to down 3 teeth he would need a 38T rear sprocket.

It wont be a slug. But it wont be a beast take off. Due to the higher gearing his top end will increase. If he drag racing the bike this is the best solution for him.

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His top end will increase if the engine has enough power to overcome air resistance with that gearing.

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