Achaios Posted June 6, 2021 Share Posted June 6, 2021 Hello !I have a strange problem that holds on for some time now.My Tracer is an 2018 GT with full MIVV exhaust system + 2WDW flash.Sometimes during a cold start the rpms seem to "stick" higher than normal cold run idle after pulling the throttle a little.But the real problem is that the bike seems to lack significant power under full throttle.For example during acceleration from 50 km/h (30mph) to 100 km/h (~60mph) in 6th gear everything is fine until i cross 3/4 throttle. Then it seems to hit a "wall" and creeps up to speed, often hardly accellerating at all.This happens in all gears but most noticeable in 5th and 6th, through all modes, TCS on and off.After hitting higher rpms it seems to be gone but it isn´t because it lacks power to even go beyond 190 km/h (120 mph).I would be glad to get some suggestions to try and fix this before I take her to the dealership. Link to comment Share on other sites More sharing options...
Bill H Posted June 6, 2021 Share Posted June 6, 2021 30 MPH in 6th gear ?? 😜 why ?? I think that's your problem ,,,,don't mean to be overly critical but if I understand you correctly that's the worst thing you can do is bog it down like that 4 Link to comment Share on other sites More sharing options...
Achaios Posted June 6, 2021 Author Share Posted June 6, 2021 That speed is not the issue, this was just an example. It does the same accellerating from 60mph --> half or 3/4 throttle everything is fine, full throttle it barely even accellerates. Link to comment Share on other sites More sharing options...
Bill H Posted June 6, 2021 Share Posted June 6, 2021 so if you say downshift to 4th at 60 and hammer throttle does it pull away good was it like this before or after the re-flash Link to comment Share on other sites More sharing options...
angrygirafe Posted June 6, 2021 Share Posted June 6, 2021 There is no need to be using 6th gear to accelerate, ever. Think of it as overdrive when you’re on the freeway and just cruising. What RPMs are you considering “higher”? Anything less than 5k will result in poor performance acceleration/response wise. Not being able to get past 120mph is interesting though. Have you tried that in 5th? 2 1 Link to comment Share on other sites More sharing options...
Achaios Posted June 6, 2021 Author Share Posted June 6, 2021 8 minutes ago, angrygirafe said: There is no need to be using 6th gear to accelerate, ever. Think of it as overdrive when you’re on the freeway and just cruising. What RPMs are you considering “higher”? Anything less than 5k will result in poor performance acceleration/response wise. Not being able to get past 120mph is interesting though. Have you tried that in 5th? The speed I mentioned earlier was just an example. It has nothing to do with the core problem being after 3/4 throttle no power. I drove it for 15000 kms now and know how it should behave Think of it like engines with an carburator. If it is badly tuned it will "flood" the engine under full throttle. It feels the same here. 23 minutes ago, Bill H said: so if you say downshift to 4th at 60 and hammer throttle does it pull away good was it like this before or after the re-flash It pulls away good with the problem less noticeable but still lacks power. After flash but flash was installed 10k kms ago and problem exists since ~1000 kms. Link to comment Share on other sites More sharing options...
Bill H Posted June 6, 2021 Share Posted June 6, 2021 3 minutes ago, Achaios said: The speed I mentioned earlier was just an example. It has nothing to do with the core problem being after 3/4 throttle no power. I drove it for 15000 kms now and know how it should behave Think of it like engines with an carburator. If it is badly tuned it will "flood" the engine under full throttle. It feels the same here. It pulls away good with the problem less noticeable but still lacks power. After flash but flash was installed 10k kms ago and problem exists since ~1000 kms. Im not clear when this all happened if right after the flash ,,or 10K after ,,,I would call or send an email to Nels at two wheel ,, Link to comment Share on other sites More sharing options...
Achaios Posted June 6, 2021 Author Share Posted June 6, 2021 4 minutes ago, Bill H said: Im not clear when this all happened if right after the flash ,,or 10K after ,,,I would call or send an email to Nels at two wheel ,, I wrote him an email some days ago but they say it´s the first time they heard of this problem. Link to comment Share on other sites More sharing options...
Bill H Posted June 6, 2021 Share Posted June 6, 2021 and I'm not here to bad mouth your dealer ,,they may be great but I had an absolute nightmare with my Tracer and would not trust them to put air in my tire,,I will never take my bike to them over an independent shop Link to comment Share on other sites More sharing options...
Bill H Posted June 6, 2021 Share Posted June 6, 2021 6 minutes ago, Achaios said: I wrote him an email some days ago but they say it´s the first time they heard of this problem. that's rather vague,,,I have my doubts about those guys ,,the dude that works the counter seems like a used care salesman,,kinda shady imo. both my tracer and fzo7 they claim to set cooling fan to kick on at 200 and both times they claimed they could not override it ,,im not a fan,,,no pun intended ,,not sure what part of the world your in but hopefully someone will chime in with good advice Best Link to comment Share on other sites More sharing options...
Achaios Posted June 10, 2021 Author Share Posted June 10, 2021 So I found the culprit, so to speak.Something was clogged. This is what is left of my catalytic converter. I am surprised that I didn´t notice a greater difference. Does the mapping still work if I just rip out the wavy metal part? Tried riding it without the piece, it was deafening. Link to comment Share on other sites More sharing options...
Your_Boy_Yuriy Posted June 10, 2021 Share Posted June 10, 2021 Very interesting thread, Subscribed. A clogged exhaust will have a major effect on the acceleration. However, I would definitely put back the buffing pieces and just double check all the sensors and use fresh gasoline. If fresh gasoline doesn't work then it has something to due with fuel injection. Good Luck! Link to comment Share on other sites More sharing options...
Achaios Posted June 10, 2021 Author Share Posted June 10, 2021 4 minutes ago, Your_Boy_Yuriy said: Very interesting thread, Subscribed. A clogged exhaust will have a major effect on the acceleration. However, I would definitely put back the buffing pieces and just double check all the sensors and use fresh gasoline. If fresh gasoline doesn't work then it has something to due with fuel injection. Good Luck! Oh this clog was the cause for my problem, so consider this Thread semi-closed 1 Link to comment Share on other sites More sharing options...
TomTracer Posted June 10, 2021 Share Posted June 10, 2021 39 minutes ago, Achaios said: Oh this clog was the cause for my problem, so consider this Thread semi-closed Well, you still have a problem if you dont know why it clogged. Could just be an o2 sensor, but rich fuel mixture is likely a bigger issue. All the messi g around with mapping often causes lots of problems IMO. Link to comment Share on other sites More sharing options...
Your_Boy_Yuriy Posted June 11, 2021 Share Posted June 11, 2021 Well let’s think this through. You had your ECU flashed and had no issue, right? However the baffle was already in your system, correct? So what I’m saying is your ecu flash worked perfectly fine with the metal mesh that made your exhaust quiet. my theory is one of your sensors went out which is not causing a check engine light and its causing your engine to go under power above 3/4 throttle. contact your person who flashed your ECU and ask if there should be a baffle installed on the exhaust. Link to comment Share on other sites More sharing options...
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