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The only thing I can see for a different between the old and new ECU, is that the new ECU has got an hand written serial(?) number on the back and an white dot inside one of the grooves on the back of it. Also the round stamp on the front has different letters/numbers. 2004 XT660R |
Hello to everybody.....
I'm owner of a used XTx from august but my mistake was that I bought it used...and despite i live in greece it was from germany..so no warranty.... I'm newbie here and for sure i'm not a mechanic but if i understood right the problem of surging & of turn off the engine unexpectly is the old ECU . Right ? When first time i went to service and told my problem they changed my TPS. but the ..same After that they increased the low regimes.. the problem is not so often but at least 2-4 times on 50 km in city driving... if i buy this igntion module its possible to solve the probem? http://www.morepoweracing.com/mukljm...9-17568-17739/ |
Hello Tasos1 and welcome to our forum.
Of course the power commander will help to minimize the surging problems however there are cheaper solutions like the Kev Mod, please send a pm to Kev to learn exactly what the mod does and how easy it is to fit and have a look at this link http://www.captnmoto.co.uk/20603.html |
Ohh
that's a quick answer.I will sent a pm to kev and see... thnx.!!! :048: |
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I have PM you, if you can up the idle by 50 to 80 RPM it will help with the cutting out. Cheers kev |
Nice to have quick answers...
Kev really useful your PM.thnx:wave: About rpm , they have already increase them(yamaha official service), i don't know how much, but the problem of cut off sometimes in low rpm's or when i switch off the throttle still remains.. for now I can't do anything because i'm in bed due to pain in my back..... but your PM it will be the first thing i'll do when i recover... It's a really useful & nice forum.. was worthy the searching... |
HELLO TO EVERYBODY AGAIN..
I've just had an answer from another forum about the cut off problem. He claims that it's the main unit (brain) of the moto difective and that the best thing it's sell(!) the bike... has anybody hear something about the "brain" ??? p.s. I haven't yet test kev's solutin |
Try to incrase the minimum idleing then report back. :D
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Considering the above, my bike's compliance plate is marked as follows: XT660R 05/05 VG5 DM015-35A000348 The bike is an XTX and it was purchased in Australia in Feb 2006. My dealers reciept states: Yamaha XTX660 no. 000348 What gives? Is this in the range above (i.e. how does 35A00348 compare to the listed range?) Do any other Aussies have similar markings? Why is the plate stamped XTR when its an X? Mic. |
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My number is 11/04 VG5DM01574A000271 |
i just my ecu changed this week end mine is a 04 xtx had the tps changed as a recall part at xmass made my bike even worse but now its like a new bike no cutting out n the power line is alot better( it not on or off no more)
pete |
ok - so I bought my 04 XTX a few days ago - unaware of these ECU/Surging problems. I have noticed some surging and i've had the bike cut out on me twice whilst at traffic lights.
Thanks to the posts on this thread i've checked out my bike/frame number/ECU number and they fall into the range of faulty bikes. My question is this - do I a) return the bike to the dealer and try to get a replacement ECU (probably at more expense or would this still be covered under warranty takingg into account its a 04 bike and 2nd hand to me?) and hope the problem is solved or b) invalidate my 3 month warranty by trying to up the CO2 level and doing some of the advised mods and hope this helps to solve it. Any advice gratefully recieved! |
Print the 2 attachments and go to your Yamaha dealer they should change your ecu under warranty. However if you have bought your bike 2nd hand chances are the previous owner has already done this, can you open your panel on the left hand side of your air box and read the ecu number? Then I can ask Kev if that is the new or old ecu.
By left hand I mean your left when sitting on the bike. Cheers |
hi mate - yes i've looked at the bike and here is the ECU number -
5VK 8591A-00...according to other members this is one of the 'bad' ones. My frame number also lies within the range you said. Thanks for your help on this... |
mines an 04, 2nd hand & they sorted mine a few weeks back with no charge
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Good luck |
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I'll let you know how i get on. |
ok contacted dealer and they said they were 'unaware' of this so they've gone off to ring the warranty people to see if i'm telling fibs...lol
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My dealer will not even bother ringing up Yamaha to check!!! Is there any way of finding out directly from Yamaha?
My ECU number ends in 00 and my frame number is within the affected range. Z |
What we have found out about our XT660 ECU's so far, there is 3 models ECU's currently. 2004>2005 part number: 5VK-8591A-00. Known surging & cutting out problems. 2004 TPS recall must have a A2 stamped on the inside of the TPS, you have to remove the TPS to see the A2. ECU recall 2004, Yamaha supplies 5VK-8591A-01 to fix surging & cutting out problem. 2005>2006 part number: 5VK-8591A-01, known surging but greatly improved on, few cutting out issues. 2007> part number: 5VK-8591A-10 with lambda probe, awaiting feed back from owners on surging & cutting out. |
Mic,
My bike's compliance plate is marked as follows: XT660R 11/05 VG5DM015-85A000426 My bike is also an XTX, purchased in Australia in Sep 2006. Help, where do I stand with regard to the ECU issue ? |
What's the part number off your ECU??
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Kev,
I will get all the details for you by next Monday |
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So check your TPS, you will have to remove the TPS as the A2 number is stamped on the in side. |
Hi guys!
I've bought my xtx 4 days ago - 2nd hand without warranty. I didn't notice any cutting and surging. Only when I ride on 2nd gear at very low rpm (without touching the throttle) and then try to accelarate slowly - it starts to surge.. Maybe it's because the rpm are too low? Anyway my frame number is within' the faulty range, don't know about ecu yet.. EDIT: just checked my ecu No. - it's the bad one :( Tommorow I'll visit my dealership - wonder what they say - without warranty.. |
Good luck, if you need help come back we have a document you can show your dealer. Just be advised that if you require further assistance from our in house mechanic expert Kev or Freez you will need to join the supporter's scheme as per this thread
http://xt660.com/showthread.php?t=1475
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Thank You :) Tomorrow I'm gonna call them,
I have one more question: Does this faulty ecu make problem only at low rpm? or on WOT during fast acceleration through all gears? |
Ask Kev.... :rotf[1]: :loser:
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Got all the necessary info from Kev - Thank's
Anyway I haven't had any cutting or surging yet - so I won't bother about it till it comes out :) |
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Hi kawas Yamaha Australia informs me that there is a revised ECU. Your bike may have been fitted with one of these ECU's which has the old part number, this may account for your bike not showing any surging & cutting out. If it is running ok leave it alone. All the XT660 have a little surge so don't worry about it. Hope this helps you. Kev Letter from Yamaha Australia below. Kevin, some bikes in the recalled Vin range have the revised ECU under special part number 90891-30032. This part is the revised ECU but does not have the part number 5VK-8591A-01 on the casing itself. It also can be idntified with a white dot on the rear side of this remapped ECU. __________________ |
:) I'll look for this magic white dot then.
Take care! Edit: Entered diag yesterday - CO is at 28 - does it mean that someone lift it? |
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So i bought used xtr (2004.) my guarantee expired in march 2007... my dealer said that there is no chance yamaha will change my ecu at their expence, the new one cost somewhere about 550� and that is way too much for me, i had too many problems with my xt allready, cut outs, my trestler (i don't know if it's the right word) cracked... :sick[1]: There's one more thing that i'm interested... I don't know why is that but when i rev my bike and i squeeze my throttle fast bike is choking... Is it because of CO or what?? thanks |
Write directly to your nearest Yamaha head office & complain to them on the running conditions of your bike.
Explain that the cutting out is dangers & will cause an accident because as it can stall at anytime & you could be rear ended, tell them that your bike has a flat spot & surging badly. Advise them that you have approached the dealer with your concerns & they have not addressed them. Tell them if this problem is not repaired under warranty that if the stalling or flat spot causes an accident they will be held responsible because it is a proven defect & Yamaha Japan has issued a recall replacing all the TPS & ECU's on the 04 model under warrant. It worked for me. The flat spot you are talking about is a lean mixture & is quite common on the 00 ECU, increasing the CO will help but not cure it, fitting the 01 ECU makes a big difference to the whole bike. |
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Thanks a lot Kev, when i talked to guy in my service (who drives also xt 2005) he adviced me to change tps and that they will try to contact our dealer Delta team Kr�ko but he believe that i'll have to buy the damn ecu... The only bad thing is that my warranty expired almost 2 months ago... |
Even though your bike is out of warranty there is still a period of good will from Yamaha.
I would contact Yamaha directly & plead your case, as the bike being dangerous. If you go through the dealer you won't get your ECU. Contact Yamaha through their web page http://www.delta-team.com/ |
well i have an 2004 it surges so bad irs unridable, it even stalls between gears i had the ecu change and its made no noticable difference c1 is at 20 on co2 i brought the bike back to yamaha and told them i d be picking it up whenit fixed..
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i have both the bike came with 00 ending ecu and was surging and stalling between gears wich made bike dangerous when dowshifting from 3 - 2 as the rear wheel locks i had the ecu replaced under warranty with the ending 01 and its the same trouble its so lean the engine stalls it surges so bad my 6 year old daughter cant hold on and its stall without fail at low engine rpm whenever it can expecially if i am joining traffic so i am just waiting to be run over!!!!my 77 xt 500 work 10000000 better
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My stalling problem was 90% cured by upping the CO by 10 and upping the tick-over very slightly. The best thing to happen to my XTX was to have the TPS replaced. The bike is now much more ridable, still a bit surgey when cruising at slow speeds and the throttle now feels like I'm operating it and not something else.
I've spoken to 2 different Yamaha dealers and Yamaha Customer Services and they all told me that Yamaha thought they had fixed a problem with the XTX by changing the ECU but then realised that the problem was the TPS. Now the TPS has been sorted I can say the bike is much more fun to ride, not perfect but still good fun. I must just add that any speed above 40mph is absolutely amazing. It worries the plastic fantastic brigade in the twisties. |
There are two problems with the XT's one is surging & the other is cutting out.
The TPS was changed from a A1 to a A2 which has a different potentiometer scaling & better segments, there has been some further problems with the rubber seal on the A2 TPS which is to tight & is causing the bike to cut out, I won't go into the reasons with a big explanation. I have had the problem on my bike which has the 01 ECU & the new A2 TPS. I now have a fix if your bike still cuts out with the new A2 TPS. The ECU was replaced from a 00 to a 01 because of a lean mapping for emission control, on the 01 ECU they have enriched the mixture through the low to mid ranges. It is far from perfect but has an improvement over the 00 ECU. Even with a Power Commander the XT still has a small surge which is more of a characteristic then a fault. Adjusting the CO1 is only adjusting the mixture at part throttle, as soon as you open the throttle it runs on the fuel map. The only way to improve the fuel mixture is to fit a fuelling device that increase the fuel mixture across the whole throttle range. There have been a few other reported reasons why the XT has been cutting out, from the bike not charging correctly low voltage, to faulty temp sender readings. So all avenues have to be explored to find the problem as not all machines are the same. |
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