The Kev Mod is here
 

http://www.xt660.com/site/node/53

Looks great mate, well done.

kev

Well thank you for giving us this opportunity, tell me Kev are you any good with washing machines? :toothy9:

just kidding mate

Well done

Ohms
 

What is right ohm value for resistor? Is it 1K ohm as 1000 ohms, or is it 1000K ohms as 1M ohm? CaptMotos KevMod page says 1000K ohm, but Kev at his message says 1000 ohms. I am thinking of testing this mod, and got to be sure witch resistor to buy, I think its the 1K, but please confirm that.

We are going to have to ask Kev, I am afraid, I only published on my website the text and pictures that Kev submitted to me by email. Bear with us and we shall clear / rectifiy the issue asap, Kev is New Zealand and probably in the land of nod at this time so we'll have to wait a little later.

cheers

Sorry for the confusion, it is a 0 to 1k ohm resistor. CaptMoto, please can you correct your Web page.

Thanks
Kev

Thanks guys! That was quite quick.

Hello Kev,
I just wanted to know how you finally get to tweek those two temperature sensors (coolant and intake air). What about the other sensors. Did you play with them as well?
Thanks
L66

Hi Lewiss66

I adjusted my TPS well before this mod, because it was cutting out. I still have the 04 ECU. If you have an 05 ECU you don't need to adjust your TPS.

I had adjusted my CO up to, because it was lean. But this only seemed to help in the bottom end. I need something to richen it up over the whole range. So I played with the Air/Coolant temp sensors.

I am a mechanic by trade & used my experience in helping me to find a happy balance of not to rich & not to lean.
I started with the Air Temp sensor adjusted it down in Temp. Until the bike was to rich, I then turned it back a few DegC. Then adjusted the coolant temp sensor until it started to run rich then turned it back a few DegC. I carried out spark plug checks to check fuel mixture as a guide line, but it's more of a feeling how the bike pulls.

Start in the bottom to mid range, also using the CO adjustment. Once that feels good write down the settings. Now run the bike from mid to near top end ranges. Adjusting the Air & Temp sensors. Write down the settings. Now see if there is any difference in settings & mix them together to get the best result.

This is a basic way of setting fuel injection. If you want the exact science you need a Power Commander & Dyno to set it up. I.E.. Every 250RPM you can make an adjustment & save it to the Map. Remember every engine is different & needs it's own precise tuning. Yamaha mass produce engines with a base tuning spec, lean for emission control. So in most cases you can get your motor to run better, by making it breath better & richen it up.

I would recommend if you are not aquatinted with tuning engines, get some to help you. Or best of all, run it on the Dyno.

Hope that helps.
Kev

Thanks KEV,
Great Job!:038:
L66