.: XT660.com - The #1 XT660 Resource :. - Faulty ECU affected range

.: XT660.com - The #1 XT660 Resource :. ( https://www.xt660.com/index.php)

- Performance Modifications & Enhancements ( https://www.xt660.com/forumdisplay.php?f=52)

- - Faulty ECU affected range ( https://www.xt660.com/showthread.php?t=519)

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??

Kev,

I will get all the details for you by next Monday

Quote:

Originally Posted by CaptMoto

Dear g-tec, the XT660X & R were put on the market in mid to late 2004, as you can see from the attached fax, the first batch of bikes came with a faulty ECU that fault was in the fuelling setting, most of these bikes had serious cut out issues at low rpm, hence Yamaha recognized the problem and offered a free ECU replacement to all owners. Supposedly all bikes built after 2005 should come with the new ECU, however we have heard stories of bikes built after '05 with the same problems which is why I have decided to post this message for owners.

The old saying: "if it ain't broke don't change it" means you are one of the lucky few so don't worry. or..... perhaps your bike was within the range and if you have bought it 2nd hand someone has already changed it or... Yamaha replaced it from the dealership before selling it to you. Open the right hand side panel under the seat that covers the air box and read the number on the ECU to see if its the new or old one.

I agree , as posted elsewhere , my 05 XTX ran sweet ( i.e no cutouts ) untill yamaha replaced the TPS ( recall ) , now it cuts out and runs like a bunch of monkies arggggggggghhhhhhhhhhh

Quote:

Originally Posted by shamusxtx

I agree , as posted elsewhere , my 05 XTX ran sweet ( i.e no cutouts ) untill yamaha replaced the TPS ( recall ) , now it cuts out and runs like a bunch of monkies arggggggggghhhhhhhhhhh

Mine also ran fine until Yamaha fitted the recalled TPS sensor. What I found was they fitted the old faulty type that has a A1 stamped on it, instead of the new recalled A2 TPS. I made them change it again & hey presto, no more cutting out.

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

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:

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 :)