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- - Hunting / stammering ( https://www.xt660.com/showthread.php?t=14460)

Tim Cullis

19-07-10 18:24

Hunting / stammering

I've left Morocco and am now in Spain but have a new problem in that the bike is hunting at a constant throttle opening. I have the Kev fuel mod so tried adjusting the settings either way to see if that made any difference, but it didn't.

If I open the throttle the response is fine and overall performance feels about the same.

Any quick suggestions?

Tim

maxwell123455

19-07-10 18:38

Along with the usual chain tightness i would look at the cush driver rubbers as i got a similar feeling when my R's cush drives where quiet loose.

Kev	19-07-10 23:09

Did it start all of a sudden?

How was it on the last last fuel tank of fuel?

Is your O2 sensor connected?

warnabrother

20-07-10 04:49

very dirty air filter ?? :102:

Tim Cullis

20-07-10 22:59

It started all of a sudden but I've gone through four tanks of fuel since. O2 sensor is still connected. The air filter looks OK but will check further.

Kev	20-07-10 23:25

Strange one.

You have been running unleaded fuel in it all the time?

tenyamman

20-07-10 23:44

and you have no CAT if remember correctly.........meow

Kev	21-07-10 02:22

Quote:

Originally Posted by tenyamman (Post 133829)

and you have no CAT if remember correctly.........meow

Not to worried about the cat, more worried about the O2 sensor being covered in lead & sending false readings to the ECU.

If you have been using leaded fuel unplug the O2 sensor & let us know if it makes any difference.

deiaccord

23-07-10 19:01

Quote:

Originally Posted by Tim Cullis (Post 133688)

Sounds exactly like cush drive rubbers or a tight spot in the chain/chain tension. I had this quite badly on my first chain, made a world of difference when I had it replaced and the cush rubbers changed. Was only noticable on constant throttle, everything was fine if you were accelerating or decelerating.

stuxtttr

31-07-10 17:43

Just a thought but have you fitted an inline fuel filter ?

just check it is flowing through in the right direction !

happened to me on a ccm and caused no end of bother until I realised what I had done.

Hope you get it sorted soon I bet its hot out there.

Titbird

01-08-10 10:00

I've had exactly the same, stuttering under constant throttle, for about 1000 km, after fueling from an Afriquoi around Fes. Then it gradually went away, so I guess it was bad fuel. I now carry some fuel system cleaner with me and will take a Mr Funnel on the next Africa trip.

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