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Yamaha YZF-R15 version 2.0

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  • #10531
    Re: Yamaha YZF-R15 version 2.0

    Originally posted by tj666 View Post
    Hello everyone, I'm new to this forum. Anyways I hope someone here can help me out with a problem that I'm facing. I own a r15 v2, it's 7 months old, it's done around 11k kms. I've been using the powertronic rr ecu after my bike did 1500kms. The problem is that my bike just doesn't cross the 8.5rpm mark on the higher two gears, while on stock ecu it gets stuck at 9rpm. The top speed I could attain was just about 132kmph on stock ecu and around 125kmph on the powertronic ecu. There is nothing wrong with the powertronic ecu as it is tuned according to my bike. I recently did a dyno test and got it tuned and moreover I've used the same ecu on my previous r15 v1 and I've had no issues with the top speed. But I'm just not able to figure out why my v2 is not performing as it should. I get slight jerks at higher rpm, it's like it suffers to attain the top speed. Moreover no accidents and I do service regularly. I also checked the spark plugs, it's fine and I use shell petrol and motul engine oil. I'm using an aftermarket simota air filter. But what's bothering me is I see some rust in the tank opening and those holding clamps or whatever it is which is supposed to be fixed to it has come off. I'll attach a picture. So I'm thinking there's some problem with the rpm getting limited due to the tank? I have no idea and I request you people to help.

    Sent from my SM-N9005 using xBhp Connect mobile app
    As you said your bike is dyno tuned so lets assume the fueling is spot on.

    You are getting power in chunks and not in a linear manner so IMO your bike may have a bad or a clogged fuel injector.
    Which is limiting you to achieve high engine rpm.

    Comment

    • #10532
      Re: Yamaha YZF-R15 version 2.0

      Hey thank you for your reply. Well during the dyno test it crossed the 9rpm mark. It went up to 11rpm. Yes with the stock ecu bike goes up to 9rpm and with the rd unit 8.5rpm. Hence did the dyno test and got it tuned but still I get the same result.

      Sent from my SM-N9005 using xBhp Connect mobile app

      Comment

      • #10533
        Re: Yamaha YZF-R15 version 2.0

        I don't think there's clutch slipping at higher rpm. The bike is just 7 months old and after the first service I tried to check it's top speed and it's the same. 132 on a stock ecu. Then changed air filter and I put the rd unit and top speed was about 124-127. I forgot to mention that the jerks which I get at higher rpm is only when I use rd ecu but with the stock I don't feel so much jerking, but it just doesn't get there. My question is even with a stock ecu why my bike is not going more than 9rpm and that too it's a new bike, well maintained.

        Sent from my SM-N9005 using xBhp Connect mobile app

        Comment

        • #10534
          Re: Yamaha YZF-R15 version 2.0

          Hey thanks for your reply. It's a pretty new bike so I'm wondering are there any chances of the injector getting clogged. But will take the bike next week to service station and check.

          Sent from my SM-N9005 using xBhp Connect mobile app

          Comment

          • #10535
            Re: Yamaha YZF-R15 version 2.0

            Check the condition of your chain and both sprockets, had this issue myself, a gunked up front sprocket was the issue.

            Sent from my Micromax A190 using xBhp Connect mobile app
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            Statistics show that more than 75 % of violent crimes are committed within 24 hours of eating bread !
            Bread is known to be extremely addictive. Subjects deprived of bread and given only water, actually begged for bread after just two days !
            Bread has been proven to kill. Scientists have now uncovered alarming evidence that 100% of the people who eat bread will eventually die !

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            • #10536
              Re: Yamaha YZF-R15 version 2.0

              Originally posted by tj666 View Post
              I don't think there's clutch slipping at higher rpm. The bike is just 7 months old and after the first service I tried to check it's top speed and it's the same. 132 on a stock ecu. Then changed air filter and I put the rd unit and top speed was about 124-127. I forgot to mention that the jerks which I get at higher rpm is only when I use rd ecu but with the stock I don't feel so much jerking, but it just doesn't get there. My question is even with a stock ecu why my bike is not going more than 9rpm and that too it's a new bike, well maintained.

              Sent from my SM-N9005 using xBhp Connect mobile app
              I have no idea regarding the Powertronics ECU, But I did go for a top speed run on the Chennai Outer Ring road last Sunday on my fully stock, 1 year old V2 and I was able to attain 144kph (took a little while though) and I know that it could do a little bit further since I've hit max at 147 kph on NH 66! Hope your investment on the ECU doesn't go useless since I've seen videos of those R15's hitting 150kph, And do check the video I took last sunday----> http://m.youtube.com/watch?v=cGD3zEPN6VA And one of the pics taken!
              Attached Files

              Comment

              • #10537
                Re: Yamaha YZF-R15 version 2.0

                Originally posted by tj666 View Post
                I don't think there's clutch slipping at higher rpm. The bike is just 7 months old and after the first service I tried to check it's top speed and it's the same. 132 on a stock ecu. Then changed air filter and I put the rd unit and top speed was about 124-127. I forgot to mention that the jerks which I get at higher rpm is only when I use rd ecu but with the stock I don't feel so much jerking, but it just doesn't get there. My question is even with a stock ecu why my bike is not going more than 9rpm and that too it's a new bike, well maintained.

                Sent from my SM-N9005 using xBhp Connect mobile app
                A clutch slippage is not necessarily linked to wear and tear of the clutch plates only. While it is not such a well known fact, clutch slippage can happen even due to use of a particular brand of oil. Many a times the clutch slipping will happen only when the loads are extreme such as you trying to redline the bike. Also it is quite difficult in most of the time for a bike to go beyond 9,000 rpm in the last 2 gears due to a number of factors such as wind resistance, condition of chain/ sprocket (someone mentioned this earlier), tyre pressure, etc. Do not discount these factors, they have a HUGE say in how well the bike performs.
                Only a biker knows why a dog sticks his head out of a car window.

                Multum in Parvo - Much in Little

                "Yes, it is FAST! No, you CAN'T ride it!" - http://www.xbhp.com/talkies/general-...a-300-san.html

                Comment

                • #10538
                  Hey thanks for replying. There's no problem with the sprocket and chain. I lube the chain after every 200 kms.

                  Sent from my SM-N9005 using xBhp Connect mobile app

                  Hey thanks for replying. Just checked your video. Wow you could attain that speed with just the stock ecu! Nice. Well no I've been using the ecu for nearly 2 years. I earlier had a v1 and the ecu was working just fine. No issues at all. Then I upgraded to r15 v2 and started using the same ecu. Later I did the dyno test and found that it's performing worse than a stock bike. So there's something wrong with my bike for sure but not the ecu.

                  Sent from my SM-N9005 using xBhp Connect mobile app

                  Well I've been using the same brand oil since I bought the bike and moreover I maintain tyre pressure as well. Thing is a week back after getting the bike tuned I went to airport road in Bangalore to test the top speed. I rode my friends bike and found that his v2 goes past the 9k rpm in the higher gears. So I did a top speed test on my bike with both the ecu units as I've mentioned earlier. Then today I went to nice road and trust me at one point the bike went past the 9rpm and I attained 141kmph but soon the rpm started dropping drastically and got stuck to 8.5rpm. All this was done on a straight lane. Then later I tried going down a slope but again the rpm is 8.5 not going more! I was using the rd unit btw.

                  Sent from my SM-N9005 using xBhp Connect mobile app

                  MOD NOTE: Hey tj666 please use multiquote or edit your previous post, instead of posting multiple times. Thanks
                  Last edited by The Monk; 12-23-2014, 04:05 PM. Reason: Consecutive posts. Please use Multiquote

                  Comment

                  • #10539
                    Re: Yamaha YZF-R15 version 2.0

                    Originally posted by siddharthsure View Post
                    Svc guys are always lubing inside the clutch lever with grease... Is this the cause for clutch cable getting cut near lever?? @psr sir, you told this right?? Went to svc today to get my clutch tightened. They applied grease inside the lever without my knowledge ( Maybe when i went to drink water ). Immediately removed them with A piece of cloth :/
                    Actually not lubing inside the clutch lever will lead to the cable pinion not moving freely and getting cut...so applying a little bit of grease is welcome, and ensures free movement...During rainy season this is needed to keep water from making the action stiff, and a little excess will prevent water and moisture from causing rusting of the exposed clutch cable inside the lever assembly......
                    When Was The Last Time,You Did Something For The First Time.

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                    • #10540
                      Re: Yamaha YZF-R15 version 2.0

                      tj666 - stock R15s regularly do at least 135+ and also 140+ for many people (on the speedo), so it shouldnt come as a surprise tbh....with everything stock, chain sufficiently lubed and correct tyre pressure (and assuming a day of usual wind resistance, not in days of extra and significant headwinds) , my bike crosses 135 pretty easily and it's not so hard to attain 140+ either..of course these are only speedo numbers so amenable to some error...of course it also requires optimally maxed out gearing in the sub-sixth gears as well...my body's underweight (only 55kgs or so) also probably contributes quite a bit to my bike hitting 135 (surprisingly) very easily haha :-D

                      however, as already mentioned earlier in one of the posts, if the chain is pretty dry and more importantly (something which i have experimented with a bunch of times) if the tyres are not at proper pressure range then reaching even 130 (on the speedo) will feel harder for the bike than it's supposed to...

                      5th gear usually reaches almost all the way to 10500 and crosses 10000 (at which point speed is about 123-124kmph if i remember right) easily anyways however 6th gear can manage no more than 9600-9700 it seems even in the bike's best day with optimally maxed out gearing of the lower gears :P

                      Comment

                      • #10541
                        Re: Yamaha YZF-R15 version 2.0

                        Originally posted by aditya_YZF-R15 View Post
                        tj666 - stock R15s regularly do at least 135+ and also 140+ for many people (on the speedo), so it shouldnt come as a surprise tbh....with everything stock, chain sufficiently lubed and correct tyre pressure (and assuming a day of usual wind resistance, not in days of extra and significant headwinds) , my bike crosses 135 pretty easily and it's not so hard to attain 140+ either..of course these are only speedo numbers so amenable to some error...of course it also requires optimally maxed out gearing in the sub-sixth gears as well...my body's underweight (only 55kgs or so) also probably contributes quite a bit to my bike hitting 135 (surprisingly) very easily haha :-D

                        however, as already mentioned earlier in one of the posts, if the chain is pretty dry and more importantly (something which i have experimented with a bunch of times) if the tyres are not at proper pressure range then reaching even 130 (on the speedo) will feel harder for the bike than it's supposed to...

                        5th gear usually reaches almost all the way to 10500 and crosses 10000 (at which point speed is about 123-124kmph if i remember right) easily anyways however 6th gear can manage no more than 9600-9700 it seems even in the bike's best day with optimally maxed out gearing of the lower gears :P
                        Well in 5th gear my bike does not go more than 9.5 rpm and in 6th not more than 8.5rpm. Well I guess with the rd unit you can go up to 10000 rpm in the 6th gear. Well like I said I even rode the bike in a down slope and even then it does not cross 9rpm.

                        Sent from my SM-N9005 using xBhp Connect mobile app

                        Comment

                        • #10542
                          Re: Yamaha YZF-R15 version 2.0

                          Originally posted by tj666 View Post
                          Then I upgraded to r15 v2 and started using the same ecu. Later I did the dyno test and found that it's performing worse than a stock bike. So there's something wrong with my bike for sure but not the ecu.
                          Why not plug in stock ECU once and see how bike performs. I doubt using same ECU would hinder performance because v2 and v1 have almost same engine specs. But give it a try if you have stock one.

                          Comment

                          • #10543
                            Re: Yamaha YZF-R15 version 2.0

                            Originally posted by Tanmay26 View Post
                            Why not plug in stock ECU once and see how bike performs. I doubt using same ECU would hinder performance because v2 and v1 have almost same engine specs. But give it a try if you have stock one.
                            Hey i've already mentioned that i've used both the ecu units and the stock ecu limits to 9 rpm while the rd ecu limits to 8.5 rpm.

                            Comment

                            • #10544
                              Re: Yamaha YZF-R15 version 2.0

                              Originally posted by tj666 View Post
                              Hey i've already mentioned that i've used both the ecu units and the stock ecu limits to 9 rpm while the rd ecu limits to 8.5 rpm.
                              my bad

                              So only problem is struggling in 5-6 gear. Are you sure there are no pads dragging on disc, because that would create extra load at those speeds.

                              I have v1, with 120/80 tyre rear and it used to attain top speed in 5th gear, load during 6th was so high it used to bog down, though it could easily redline in 1-2-3-4.
                              Your's is stock and showing a bit similiar issues, so only thing first comes to mind is there is drag somewhere, in my case it was increased circumference.

                              Also, did you used simota filter in your old r15 or only in v2?
                              Last edited by Tanmay26; 12-24-2014, 08:02 PM.

                              Comment

                              • #10545
                                Re: Yamaha YZF-R15 version 2.0

                                Originally posted by Tanmay26 View Post
                                my bad

                                So only problem is struggling in 5-6 gear. Are you sure there are no pads dragging on disc, because that would create extra load at those speeds.

                                I have v1, with 120/80 tyre rear and it used to attain top speed in 5th gear, load during 6th was so high it used to bog down, though it could easily redline in 1-2-3-4.
                                Your's is stock and showing a bit similiar issues, so only thing first comes to mind is there is drag somewhere, in my case it was increased circumference.

                                Also, did you used simota filter in your old r15 or only in v2?
                                No I recently changed the brake pads. My bike has done 11k odd kilometers. No the simota filter was put only on v2 that too after the last service. So even before that the bike's performance was bad. I guess I'll be going tomorrow to the service station to check if there is some clog in the injector.

                                Sent from my SM-N9005 using xBhp Connect mobile app

                                Comment

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