Kev mod and 02 controller
 

hi
In a recent ebay frenzy, i purchased this

http://www.ebay.co.uk/itm/3218259924...%3AMEBIDX%3AIT

It is Kev mod and 02 controller but im not sure if i can put on my bike... shoulda checked.

it has 66391236 on the controller but no other information.....

can i fit this? or is it for a different bike altogether?

Purchased as since fitting metal mule exhaust it to see if it calms the new surging it seems to have......

any help as always :) :) :)

You should be OK with the Dynojet O2 optimizer and that appears to be a genuine Kev mod, not a copy/DIY job. What colour knob is on the dial? If you have a multimeter you could check the range of resistance the Kev mod gives to give an idea of what version it is.

Yip that is one of my latest fuel mods.

:)
 

Thanks guys, ill let you know how it goes on :)

Nethen, let us know how it goes please.:icon_razz:

Kev,

My 660r is awful, surging and popping and banging on overrun. it has a PC fitted and a 2-1 with a scorpion silencer..will your mod sort this out please ?.

Kev's mod will not help you if you have a PC fitted. What map are you running? Is it a custom map, or one downloaded from somewhere? A custom map may help. What year is your XTR?

In the meantime have a read of this thread and the links within it. Should give you some ideas to help with the surging.

The popping and banging is easily fixed by blocking the AIS - read this thread.

I dont know which map, i bought the bike with it already fitted. 2007 bike.

I will check the AIS pipe and get the PC map checked... Thanks.

If you join the XT Supporter's Scheme you can get access to a huge database of PC maps to try which are listed in the Ask Kev section of the forum (which is only available to supporters). There are loads of other benefits too and it's only a tenner to join. Click on the links in my signature line to find out more.

Will sign up soon thanks.

I am not too bothered about power as this will be my trail bike so i need smooth power for the trails. should i remove the PC and fit the kev mod ?.

No. Ultimately the PC does a more the same thing as the Kev mod, but does it specifically for any given engine speed and throttle opening so can be tailored exactly to your power/economy needs, and more importantly the bike's state of tune. The Kev mod changes the fuelling by a fixed amount (depending on manual adjustment of setting) regardless of throttle position/revs.

Bear in mind, both only affect the open loop fuelling which on post 2007 XTs with O2 sensors fitted. A Dynojet O2 Optimizer or Kev's O2 Controller need to be fitted in addition to adjust the closed loop fuelling. It is usually the boundary between open and closed loop mapping that causes the jerky throttle/surging on O2 sensor equipped XTs. This is where an O2 controller/optimizer helps.

What year is your XTR?