I did it on my 2021 Duke 390 recently and its the best thing i could have done. It's amazing how 1 tooth can make such a difference. My pick up is everything a duke 390 should be. If pick up what you want just do it. I did a complet chain and 2 sprocket change over. 😊😊😊
@@giovannihuerta5402 yes. Stock rear 14 tooth front. It's brought a new life into the motorcycle. Any questions or worries just text and I tell you what you want to know. I just wanted the chain and 45 rear new when I put the 14 on the front
Looking to raise the top speed and cruising speed. Was going to a 15/43 combo. Had a Yoshimura GSX-R 750 ,so fast excelleration is not what I'm looking for out of a 373cc engine, but the RC390 handling makes me want to increase its upper end. You must have hit some slippery stuff in that turn because the ABS and Turning traction controll (2023 ?) Should have kept you tracking. Did a panic front brake stop from 60 and kept traction. Thanks for video! Ride safe!
These bikes do not have a top end increase when you swap gears because of the lack of power to do so. You actually gain top speed by dropping a tooth in the countershaft sprocket. I own 5 of the 373cc powered bikes and they all respond the same.
I am from india am owning the same bike, I concern about top speed and touring, In indian version rev limiter is 10k it clocked 170kmph If i change to 14theet will it affect the top speed and cursing speed
Hi, I've got the same bike. If you're reducing the no. of teeth on the front sprocket or increasing a few on the rear, you would loose out on a little top speed but consequently gain a proportional amount in terms of acceleration. (Try learning about gearing ratios.) Hope it helps
@@SeanFillner I watch all your videos but I'm from Thailand so I can't listen. Can you type in your language in the gps holder section here for me? I have a translation app. Thank you very much.
Nice, thinking of getting one of these, can you do a review video on it? Things you like/don’t like, and how it does for commuting and at speed etc etc
@@SeanFillner Typical Indians.. always worried about top speed.. coz they need to brag about it among their friends . Yes Hardik.. it will affect top speed a little bit, it'll get down by 4-5 kmph
It changes your final drive from 3:1 to 3.21:1, which will reduce your top speed by about 6 mph (10kph). It will also increase your engine rpm for any given speed, as well as increase fuel consumption a little. But it accelerates faster and is more useable in slow technical offroad use in first gear. It's a trade-off between which performance characteristics are more important to you. Hope this helps you.
On paper it does. You won't get anywhere close to those numbers in real life scenarios. Wind/air resistance and the bikes lack of power/torque will limit those numbers when you go up a tooth on your front sprocket. Several youtubers have proven your top speed is greater using the 14 tooth sprocket on these 373cc powered bikes. These bikes were NEVER meant to travel at that speed. I own 5 of them. Buy a bigger bike if you want to travel at those speeds.
I been riding since 03 an I bought a duke 390 for my son. He's 17. I've personally been 112 on it using a 16tooth an 102 using the 15tooth. That's pretty damn close to what the paper says. I'm in alabama if that makes a damn. There is no way in hell that 14 can keep up with a 16. The rev limiter limits it's top speeds. An why you owned 5? Lol seems like a waste of money
@stevie9361 @stevie9361 physics do not allow you to cut through wind with less torque. Don't worry about what I spend my money on. I will own as many bikes as I want and there is nothing you can do about it. Find another channel to troll. 2:01
14t front sprocket vs the stock 15 tooth sprocket offers short gearing, quick acceleration, better tractability or rideability in traffic, this means you can ride 1 gear up and it's much easier to manage, while the losses are, stress on the engine because it revs higher, less fuel efficiency because of low speed while running at the same RPM's as compared to 15t
You have it backwards. The 373cc engine is MOST EFFICIENT at 6500-7500 rpm which is where it sits from 65-80 mph with a 14t front sprocket. It is the main reason I install a 14t sprocket on ALL 373cc powered bikes.
I’ve only been riding for a year and change and I’ve never felt like the RC is a handful even when I first got it you might wanna try hopping on something bigger just to take it for a test drive to give yourself some perspective because in the grand scheme of motorcycles the RC is very very slow.
I did it on my 2021 Duke 390 recently and its the best thing i could have done. It's amazing how 1 tooth can make such a difference. My pick up is everything a duke 390 should be. If pick up what you want just do it. I did a complet chain and 2 sprocket change over. 😊😊😊
So you did a 14 T front sprocket (1 tooth down from stock) and the stock 45t rear sprocket?
@@giovannihuerta5402 yes. Stock rear 14 tooth front. It's brought a new life into the motorcycle. Any questions or worries just text and I tell you what you want to know. I just wanted the chain and 45 rear new when I put the 14 on the front
@@giovannihuerta5402I did front 14 and rear 46, put the 250 duke sprocket kit on my RC 390 and it has brought back a lot of life into my bike
can i install duke 200 sprocket in duke 390 for low speed rides
@@motologist1917 I don't know. Keep well
Looking to raise the top speed and cruising speed. Was going to a 15/43 combo. Had a Yoshimura GSX-R 750 ,so fast excelleration is not what I'm looking for out of a 373cc engine, but the RC390 handling makes me want to increase its upper end. You must have hit some slippery stuff in that turn because the ABS and Turning traction controll (2023 ?) Should have kept you tracking. Did a panic front brake stop from 60 and kept traction. Thanks for video! Ride safe!
These bikes do not have a top end increase when you swap gears because of the lack of power to do so. You actually gain top speed by dropping a tooth in the countershaft sprocket. I own 5 of the 373cc powered bikes and they all respond the same.
@@SeanFillner thanks for that. 14 tooth for me! You the Man! Thks!
@@hatchetjack1031how’s the 14t holdin up? Noticed any change in top speed?
I went 16t front it's amazing
Had to go 16t much longer gears so good on the highway
Hey, which GPS navigation you have mounted on the bike in this video ? I would love to get one.
Check out the playlist I created for this build series for all of the details. Bike has been sold. Thanks for tuning in!
Why did you sell the bike?
@@LukiNes69 it was time to move on.
Any problems u faced after changing?
Is the chain making more noise now?
Uhm, why would it make more noise??
I am from india am owning the same bike, I concern about top speed and touring, In indian version rev limiter is 10k it clocked 170kmph
If i change to 14theet will it affect the top speed and cursing speed
I have not noticed a difference however I don't commute at 105+ mph.
Hi, I've got the same bike.
If you're reducing the no. of teeth on the front sprocket or increasing a few on the rear, you would loose out on a little top speed but consequently gain a proportional amount in terms of acceleration.
(Try learning about gearing ratios.)
Hope it helps
Where can I find a gps mount?
Check out the playlist I created for this bike. There is an episode where I cover it in depth.
@@SeanFillner I watch all your videos but I'm from Thailand so I can't listen. Can you type in your language in the gps holder section here for me? I have a translation app. Thank you very much.
Is it ok if i use 14 T front and 42 T rear sprocket for rc 390?
You can use whatever sprocket you want. That combo would probably be pointless though.
@@SeanFillnerbut why
mai b yehi sonch rha tha , kya apne install kia phir
@@motologist1917 because
What's your sprocket gearing now?
I put 14 tooth front sprockets on all 5 of my 373cc ktm powered bikes.
@@SeanFillner
How about the rear?
If it's not in the videos I never changed it. It's a pointless mod on these budget bikes. A 14t is plenty.
that camera needs to be angled way up, or zoomed out so we're not just getting a view of the ground and the dash
I think I talk about that in this series playlist... thanks for tuning in!
Nice, thinking of getting one of these, can you do a review video on it? Things you like/don’t like, and how it does for commuting and at speed etc etc
This is the review.
Bro it's a sproket
@@diaryofanolddad lol
You have to be careful you don’t wheelie? I’m buying it I wanna do lots of wheelies on my rc 390. It’s hard to wheelie stock
I got a 390 completely stock. I can wheelie it but only in first and I have to power wheelie I can’t pop the clutch.
@@RGB_WaTeRsame
@@RGB_WaTeR just practice cutch up at 15 -20 and m stock and doing just fine But I want new triple clans and bars tho
is it ok if changing the rear sprocket to 39t for ktm rc200 2023 ??
How can I correct the speedometer?
You cant unless you have a ktm programmer.
@@SeanFillner I wish there was a corresponding “Speed Healer”
Will it effect its top speed?
Do you normally ride at 105mph when commuting?
@@SeanFillner Typical Indians.. always worried about top speed.. coz they need to brag about it among their friends .
Yes Hardik.. it will affect top speed a little bit, it'll get down by 4-5 kmph
It changes your final drive from 3:1 to 3.21:1, which will reduce your top speed by about 6 mph (10kph). It will also increase your engine rpm for any given speed, as well as increase fuel consumption a little. But it accelerates faster and is more useable in slow technical offroad use in first gear. It's a trade-off between which performance characteristics are more important to you. Hope this helps you.
@@bacbladerunner on paper only. In real world use I have only seen benefits
what's the stock teeth count?
15
14/45 gives you 99.5mph at 10k redline
15/45 gives you 106.6mph
16/45 gives you 113.7mph
On paper it does. You won't get anywhere close to those numbers in real life scenarios. Wind/air resistance and the bikes lack of power/torque will limit those numbers when you go up a tooth on your front sprocket. Several youtubers have proven your top speed is greater using the 14 tooth sprocket on these 373cc powered bikes. These bikes were NEVER meant to travel at that speed. I own 5 of them. Buy a bigger bike if you want to travel at those speeds.
I been riding since 03 an I bought a duke 390 for my son. He's 17. I've personally been 112 on it using a 16tooth an 102 using the 15tooth. That's pretty damn close to what the paper says. I'm in alabama if that makes a damn.
There is no way in hell that 14 can keep up with a 16. The rev limiter limits it's top speeds.
An why you owned 5? Lol seems like a waste of money
@stevie9361 @stevie9361 physics do not allow you to cut through wind with less torque.
Don't worry about what I spend my money on. I will own as many bikes as I want and there is nothing you can do about it.
Find another channel to troll. 2:01
Does it wheelie clutching up in 2nd now?
You could do that with the stock gearing. Now it is just mental.
14t front sprocket vs the stock 15 tooth sprocket offers short gearing, quick acceleration, better tractability or rideability in traffic, this means you can ride 1 gear up and it's much easier to manage, while the losses are, stress on the engine because it revs higher, less fuel efficiency because of low speed while running at the same RPM's as compared to 15t
You have it backwards. The 373cc engine is MOST EFFICIENT at 6500-7500 rpm which is where it sits from 65-80 mph with a 14t front sprocket. It is the main reason I install a 14t sprocket on ALL 373cc powered bikes.
I’ve only been riding for a year and change and I’ve never felt like the RC is a handful even when I first got it you might wanna try hopping on something bigger just to take it for a test drive to give yourself some perspective because in the grand scheme of motorcycles the RC is very very slow.
How about a 901 that replaced this?
Dude get a car. Sorry someone has to say it
Dude find another channel. Not sorry someone has to say it.