My bike is whitin the "faulty" range, and I got an new ECU from my dealer and installed it myself yesterday. The old and new ECU has exactly the same part number on the front, both ending with 0. The surging got much better with the new ECU, and the power is the same as before...
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:

Hi tasos

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

G'day,

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.

Very strange your number is before mine, mine is 11/04

My number is 11/04 VG5DM01574A000271