You've got pretty much the same set off intake/fuelling mods as I have and mine doesn't seem to exhibit the issue you describe? I do have a 2-1 and no cat though...
Have you tried all the simple stuff - throttle cables adjusted correctly etc? Are the cush rubbers you replaced still OK?
You could try Kev's twist grip mod, which will help with throttle control at small openings?
http://www.xt660.com/showthread.php?p=154983
Quote:
Originally Posted by
Dev-vers
Would the bike run better due to the colder temp in the mornings? I originally had kevs fuel mod set to 6oclock. I have blocked the AIS pipe as well and have now set fuel mod to 3oclock.
|
Due to the nature of the way the fuel mod works (without getting too technical) its effects will vary slightly according the ambient temperature. At colder ambient air temperatures any given setting will have less of an effect on richening the mixture than at warmer temperatures.
For example, if you set it to "fool" the ECU into thinking its 5C lower than ambient at 20C for a richer air/fuel ratio, that exact same setting will only cause a "fooling effect" of 2.5C at an ambient temperature of 5C, so the air/fuel ratio will not be as rich.
The higher the ambient temperature, the greater the difference a given setting will make.
This graph might help you visualise what's going on...
I've found that if set right at an ambient temperature of 20C, that setting will generally cover most conditions from 15-25C. Below 10C I tend to crank the dial up one or two notches to compensate for the colder conditions and if its hotter than 25C (rare but not unknown in the UK), I back it off a bit.
It could be you've got the mod setup perfectly for the colder temperatures, but not for the warmer ones? Try having a fiddle with the fuel mod settings at different air temperatures. See if you can hang the fuel mod control out from under the seat so you can tweak it on the move easily.