I would put the 15 tooth back on. then attitudes to the rear end you would be surprised on one or two teeth to the rear end would do. It’s not much of an impact as a front sprocket, but it’s a more subtle approach.
MotoMirius mentioned in his video "5 Common Myths - KTM Duke 390" that Supermoto Mode not only disables the rear ABS but also *lets you pick up the front easier* (suggests a change in throttle response, ECU map or similar) - and the same applies for the breaking. I haven't tried much with the throttle in Supermoto Mode, but I can tell you something *definitive* about the *change in breaking behavior:* I was practicing emergency breaking and was happy when I finally was able to get the rear wheel up a few cm after like the 100th try. I thought "I finally braked hard enough..." Oh how wrong I was. Sometime later I switched to Supermoto Mode for the first time out of curiosity - and during the first squeeze my rear wheel went up like 30-50cm before coming to a stop. I felt like I'd crash XD. On some following tries the rear wheel broke out, etc. Turns out the Duke 390 must have a forward/backward leaning angle sensor, which engages front ABS not only when the front wheel jams but also when your rear wheel is just about to lift off the ground! So the bike might behave similarly with the gas when the front wheel is about to lift off (to mitigate back-flipping). I cannot confirm that yet but I was practicing launching the bike quickly from a stop yesterday. If my front wheel picked up slightly, the power went down and I had to try to counteract that with even more vigorous throttle. Duh, might ofc be just lack of skill, the torque being too weak in the middle powerband, or my imagination. But it could also be the ECU reacting to the front wheel picking up too sudden. Some rambling: In hindsight I realized what an amazing safety feature that is (for braking). I ride for a month but in Street ABS mode I can already break (on straights) with this bike like a pro, perfectly straight from high speeds to zero, even in pouring rain (tested it), rear wheel never braking to the side. But if you enable Supermoto mode you have to be much more careful and skilled with the brakes, since there is "only" front ABS then. I almost pity the people now who have to learn breaking without any ABS. This feature lets you learn breaking well with so much less stress, since you can focus on improving one single thing at the time, like looking straight ahead and not on the ground, while the bike compensates for errors in applied force on the brakes.
Some serious detail brother, glad you’re enjoying the Duke👍. You may be right about ECU/electronics preventing the wheelies. It’s virtually impossibly in the dirt. The videos I’ve seen of people doing it probably have an aftermarket ECU. That said, I have notice preloading the front suspension with your weight first and then throttling while throwing your butt back will do the trick at low speeds.
Hello my friend. If it didn't cost you a fortune cookie I would have suggested keeping the 15 tooth front sprocket and going to a 48tooth rear sprocket. I am running with a fuel programmer but that really just adds more fuel at approximately 6000rpms . The larger rear sprocket my compute to a smaller front but your not turning the motor at so many intervals. And trust me it will pull the front end up with a slight twist of the throttle and dump of the clutch . Absolutely love you're honesty and lack of editing the bo boos. Scott
Thanks Scott as always. This is true my friend. I did think of that. A larger rear sprocket would also reduce the revs. If I do end up goin with the rear sprocket ill be sure to slap that 15t back on. Also looking at the fuel mapper eventually, too. 👍 what are you using? Fuelx lite, pro?
@@advinjapan fuel programmer is from best duel sport bikes. You'll find info on his TH-cam channel. Also purchased rear sprocket there. Great guy fast shipping. Well..... here anyway. Peace. Scott
@@advinjapan chain and sprocket are currently out of stock at best duel sports. Other sites sell 48 rear aluminum for about same price . 1.75 lbs lighter and no worries about rusting as mine is not looking as pretty as it did because it's steel. Yuk! Just a heads up on that. Happy trails. Scott
I did the front sprocket, the Fuel X Lite and a mid muffler delete. Unfortunately the exhaust gasket at the head did not survive the exhaust work. I ordered a new one but it’s not in yet. Once it is back together I’ll take it for a blast!
@@advinjapan this isn’t my first Fuel X. Yes, it is absolutely worth it! I haven’t stalled the bike once since installing it. I killed it a few times before. This bike likes some revs. Not like the old BMW R1200 GS. I could let the clutch out without giving it any throttle. The 390 likes some gas but not as much with the Fuel X.
I did the front sprocket yesterday and after a long mainly road ride today, I absolutely love it. I can now comfortably find a gear to keep me around 6000rpm for the given speed limit (Australia) and have power on tap. Slow speed manoeuvres are much more comfortable as well it felt like. Next I'm adding a 1 finger clutch kit to expand the friction zone and that should really help with anything slow and technical off-road. Love the vids.
@@advinjapan yes it arrived yesterday, looks good but I'm adding some grease to the pin part as it's bone dry supplied. Quality made tho, should work well I think. I already have the longer clutch cable for my riser so be an easy fit.
I have done the FuelX lite, and it was a great improvement for city riding. The low end is much happier. Once winter lets me go off road, I am curious to see if I want the sprocket too.
Good video. I've done both the 14T front sprocket and a piggy back ECU. But had no problem with lofting the front wheel before either. After watching what you are attempting I'd suggest finding a good local MX coach. I've met a couple of great Japanese MX racers, so I'm thinking coaching should be available. Your skill set will dramatically improve under tutelage. This bike has a slow reving engine, It is benefited by the aggressive use of clutch. A good MX coach can show you how to do that, and also get the most from any bike in the dirt.
I've tried the 14T front sprocket in conjunction with the FuelX Pro and a BMC air filter on a 7500 km trip to Ladakh. It was sort of nice in the mountains, offroad etc. but on the open highway it feels like crap with the engine revving much higher for a given speed over 100 kph. It may be marginally better if you increase the rear sprocket teeth from the stock 45T to 47 or even 46T. Cheers!
Thanks Naveen. Yes, I agree here. While it seems to fix the stalling in low revs, I am getting bad vibrations and noises even at just 50 kph. At this point, I may just put the 15 back on. Thanks!
@advinjapan Sorry, gave you the wrong info, unfortunately JT sprockets sells the dampened front sprocket only in 15T size... I also haven't found any other manufacturer that sells dampened sprockets for the 390 Dukes below 15T. Tipp for other people: get a cheap 14T sprocket first to see how you like the resulting ratio. Then go back to the stock dampened 15T and now you can make a more informed decision on by how many teeth you want to increase the rear sprocket. I'm currently going that route.
Hi I’m thinking about doing this to my Ktm 390 aswell would it be advisable to do it if I’m an avid rider who mainly uses their bike for work and school commutes?
Hey, thanks for watching. I actually would not recommend this upgrade for commuting because it will slightly reduce your gas mileage. It would be better maybe to increase the size of the rear sprocket. You’ll get the same benefit, but with out the fuel loss.👍
@@advinjapan Why would reducing the front sprocket to 14 teeth reduce gas mileage while increasing the rear sprocket to 48 teeth would not? Does just the tiny bit more bending of the chain links in the front have such a noticeable impact?
@SebasTian-od7oz To be honest, I don’t think it’s much. And my experience so far has proven that. It’s so minuscule of a difference it probably doesn’t matter.
No problem, glad it helped. どこに乗るかに関係なく、フューエルマッパーは本当に素晴らしいものです。燃費も良くなるし、トップスピードのパワーを落とすことなく、スプロケットのアップグレードの利点のいくつかを得ることができるんだ。もし自分でこれを取り付けたら、必ずビデオを撮りますよ。
Due, I love your videos but you have to get a better camera. The quality of the videos could be much better. I have a Black GoPro 5 which is ancient compare which what we have nowadays and still get better quality than yours!
Thanks a lot, brother! About the video quality, is your TH-cam setting on the highest video quality 4K? If so, then you’re probably referring to my 360 footage, which is garbage because it’s 4k split across the two lenses which gives you a max of 2k, this is also my friends insta 360 x2. My later videos I use the x3 winch is a slight improvement, but still garbage. But the angles you can get are worth it, imo. My helmet cam is the Hero 11. I’m releasing a video about this in the coming weeks, actually.
I ‘’m 390 adv rider in Japan too, You made a nice Video.
Hey, thanks a lot. Check out my Hokkaido videos if you get a chance🙏.
I would put the 15 tooth back on. then attitudes to the rear end you would be surprised on one or two teeth to the rear end would do. It’s not much of an impact as a front sprocket, but it’s a more subtle approach.
Thanks Dennis, yes, I’ve heard similar opinions. I’m waiting for the stock chain to go bad and I’ll probably go one up👍
MotoMirius mentioned in his video "5 Common Myths - KTM Duke 390" that Supermoto Mode not only disables the rear ABS but also *lets you pick up the front easier* (suggests a change in throttle response, ECU map or similar) - and the same applies for the breaking.
I haven't tried much with the throttle in Supermoto Mode, but I can tell you something *definitive* about the *change in breaking behavior:*
I was practicing emergency breaking and was happy when I finally was able to get the rear wheel up a few cm after like the 100th try.
I thought "I finally braked hard enough..."
Oh how wrong I was.
Sometime later I switched to Supermoto Mode for the first time out of curiosity - and during the first squeeze my rear wheel went up like 30-50cm before coming to a stop. I felt like I'd crash XD. On some following tries the rear wheel broke out, etc.
Turns out the Duke 390 must have a forward/backward leaning angle sensor, which engages front ABS not only when the front wheel jams but also when your rear wheel is just about to lift off the ground!
So the bike might behave similarly with the gas when the front wheel is about to lift off (to mitigate back-flipping).
I cannot confirm that yet but I was practicing launching the bike quickly from a stop yesterday. If my front wheel picked up slightly, the power went down and I had to try to counteract that with even more vigorous throttle. Duh, might ofc be just lack of skill, the torque being too weak in the middle powerband, or my imagination.
But it could also be the ECU reacting to the front wheel picking up too sudden.
Some rambling:
In hindsight I realized what an amazing safety feature that is (for braking). I ride for a month but in Street ABS mode I can already break (on straights) with this bike like a pro, perfectly straight from high speeds to zero, even in pouring rain (tested it), rear wheel never braking to the side. But if you enable Supermoto mode you have to be much more careful and skilled with the brakes, since there is "only" front ABS then.
I almost pity the people now who have to learn breaking without any ABS. This feature lets you learn breaking well with so much less stress, since you can focus on improving one single thing at the time, like looking straight ahead and not on the ground, while the bike compensates for errors in applied force on the brakes.
Some serious detail brother, glad you’re enjoying the Duke👍. You may be right about ECU/electronics preventing the wheelies. It’s virtually impossibly in the dirt. The videos I’ve seen of people doing it probably have an aftermarket ECU.
That said, I have notice preloading the front suspension with your weight first and then throttling while throwing your butt back will do the trick at low speeds.
Hello my friend. If it didn't cost you a fortune cookie I would have suggested keeping the 15 tooth front sprocket and going to a 48tooth rear sprocket. I am running with a fuel programmer but that really just adds more fuel at approximately 6000rpms . The larger rear sprocket my compute to a smaller front but your not turning the motor at so many intervals. And trust me it will pull the front end up with a slight twist of the throttle and dump of the clutch . Absolutely love you're honesty and lack of editing the bo boos. Scott
Thanks Scott as always. This is true my friend. I did think of that. A larger rear sprocket would also reduce the revs. If I do end up goin with the rear sprocket ill be sure to slap that 15t back on. Also looking at the fuel mapper eventually, too. 👍 what are you using? Fuelx lite, pro?
@@advinjapan fuel programmer is from best duel sport bikes. You'll find info on his TH-cam channel. Also purchased rear sprocket there. Great guy fast shipping. Well..... here anyway. Peace. Scott
Thanks brother! I’ll check it out
@@advinjapan chain and sprocket are currently out of stock at best duel sports. Other sites sell 48 rear aluminum for about same price . 1.75 lbs lighter and no worries about rusting as mine is not looking as pretty as it did because it's steel. Yuk! Just a heads up on that. Happy trails. Scott
@@scottporter0069 what a treasure trove! I had no idea about this guy. Had a look at his TH-cam channel and website, some solid stuff!
I did the front sprocket, the Fuel X Lite and a mid muffler delete. Unfortunately the exhaust gasket at the head did not survive the exhaust work. I ordered a new one but it’s not in yet.
Once it is back together I’ll take it for a blast!
Hey Dan, that’s a lot of work. Is the fuel x worth it you think? I’ve been on the fence with it for a while.
@@advinjapan this isn’t my first Fuel X. Yes, it is absolutely worth it! I haven’t stalled the bike once since installing it. I killed it a few times before. This bike likes some revs. Not like the old BMW R1200 GS. I could let the clutch out without giving it any throttle. The 390 likes some gas but not as much with the Fuel X.
I did the front sprocket yesterday and after a long mainly road ride today, I absolutely love it. I can now comfortably find a gear to keep me around 6000rpm for the given speed limit (Australia) and have power on tap. Slow speed manoeuvres are much more comfortable as well it felt like. Next I'm adding a 1 finger clutch kit to expand the friction zone and that should really help with anything slow and technical off-road. Love the vids.
Thanks Fox! Yes, totally with you on the slow speed maneuvering improvement. You going with Ali express for the one finger clutch kit?
@@advinjapan yes it arrived yesterday, looks good but I'm adding some grease to the pin part as it's bone dry supplied. Quality made tho, should work well I think. I already have the longer clutch cable for my riser so be an easy fit.
@@muzadv awesomeness! And I love the Santa suit ride, btw 🤣
@@muzadv hey u got a link to that 1-finger clutch kit? And what's your thoughts on it so far? thx
i wonder if you can find someone who has done both upgrades? Ide like to see that guy riding.
Hey Kevin, it’s a very popular upgrade out in India. th-cam.com/video/z5eF8fcHn3Q/w-d-xo.html
I have done the FuelX lite, and it was a great improvement for city riding. The low end is much happier. Once winter lets me go off road, I am curious to see if I want the sprocket too.
That’s good to hear about fuelx. I’ll probably go with it myself eventually.
Good video. I've done both the 14T front sprocket and a piggy back ECU. But had no problem with lofting the front wheel before either. After watching what you are attempting I'd suggest finding a good local MX coach. I've met a couple of great Japanese MX racers, so I'm thinking coaching should be available.
Your skill set will dramatically improve under tutelage. This bike has a slow reving engine, It is benefited by the aggressive use of clutch. A good MX coach can show you how to do that, and also get the most from any bike in the dirt.
Hey thanks ts! I really appreciate the advice. I should really give it go, you’re right. I know of a place pretty close by where you can rent.
I've tried the 14T front sprocket in conjunction with the FuelX Pro and a BMC air filter on a 7500 km trip to Ladakh. It was sort of nice in the mountains, offroad etc. but on the open highway it feels like crap with the engine revving much higher for a given speed over 100 kph. It may be marginally better if you increase the rear sprocket teeth from the stock 45T to 47 or even 46T. Cheers!
Thanks Naveen. Yes, I agree here. While it seems to fix the stalling in low revs, I am getting bad vibrations and noises even at just 50 kph. At this point, I may just put the 15 back on. Thanks!
@@advinjapan Might be because you bought the non-dampened sprocket. They also sell them with rubber on them to dampen the noise/vibrations.
Thanks Seba, good to know!@@SebasTian-od7oz
@advinjapan Sorry, gave you the wrong info, unfortunately JT sprockets sells the dampened front sprocket only in 15T size... I also haven't found any other manufacturer that sells dampened sprockets for the 390 Dukes below 15T.
Tipp for other people: get a cheap 14T sprocket first to see how you like the resulting ratio. Then go back to the stock dampened 15T and now you can make a more informed decision on by how many teeth you want to increase the rear sprocket.
I'm currently going that route.
Thanks, it’s no problem. I was aware of that👍.
Which windshield are you using please?
It’s the AliExpress rally windshield for KTM390. I don’t recommend it. It’s abs plastic, not as strong as polycarbonate so not the safest option.
Hi I’m thinking about doing this to my Ktm 390 aswell would it be advisable to do it if I’m an avid rider who mainly uses their bike for work and school commutes?
Hey, thanks for watching. I actually would not recommend this upgrade for commuting because it will slightly reduce your gas mileage. It would be better maybe to increase the size of the rear sprocket. You’ll get the same benefit, but with out the fuel loss.👍
@@advinjapan Why would reducing the front sprocket to 14 teeth reduce gas mileage while increasing the rear sprocket to 48 teeth would not?
Does just the tiny bit more bending of the chain links in the front have such a noticeable impact?
@SebasTian-od7oz To be honest, I don’t think it’s much. And my experience so far has proven that. It’s so minuscule of a difference it probably doesn’t matter.
So you were roughly going almost 56 mph. That’s a lot of RPM.
Thanks for the comment. Yes, but nothing out too far from baseline. Slightly higher than with the 15. Top speed is also hardly affected.
これぞ期待していた内容で。14Tへの交換の効果がよくわかりますね。高速使用のロングツーリング主体ならなしでしょうし、林道ツーリング主体ならありというところでしょうか。ともかく参考にさせてもらいます。ありがとうございます。Nice video and ride!
No problem, glad it helped. どこに乗るかに関係なく、フューエルマッパーは本当に素晴らしいものです。燃費も良くなるし、トップスピードのパワーを落とすことなく、スプロケットのアップグレードの利点のいくつかを得ることができるんだ。もし自分でこれを取り付けたら、必ずビデオを撮りますよ。
Due, I love your videos but you have to get a better camera. The quality of the videos could be much better. I have a Black GoPro 5 which is ancient compare which what we have nowadays and still get better quality than yours!
Thanks a lot, brother! About the video quality, is your TH-cam setting on the highest video quality 4K? If so, then you’re probably referring to my 360 footage, which is garbage because it’s 4k split across the two lenses which gives you a max of 2k, this is also my friends insta 360 x2. My later videos I use the x3 winch is a slight improvement, but still garbage. But the angles you can get are worth it, imo. My helmet cam is the Hero 11.
I’m releasing a video about this in the coming weeks, actually.