I have a complete stock 2008 XT660X. Just removed the snorkel on it,didnt change anything else and must say that there is a noticable diffrence in performance gain. Not much,but in the lower revs it pulls slightly better. Am gonna order the stage 1 & 2 aircleaners from OTR now. Still waiting on the MTC 2into1 exhausts to be available. Have just tried to order the KEV fuel mod from the forum but I can't seem to get my paypall account registered...

Anyway... You can definatly feel that there is alot more power in that engine than the way it rides coming from that factory floor...
Why don't they make em with good filters and exhausts stock???
But then again... You won't have the fun of modifying it yourself.

Stage 1&2 DNA filters ordered,check.
Diden't want to wait for the 2into1 so 2into2 exhaust ordered,check.
Fuel mod ordered,check.

Hope everything gets here before end of the week and then I'm gonna have a fun weekend

Now just having to explain to the misses...
Start doing the dishes...CHECK

Welcome to he forum, mate.
Great choice. Once you have done a all the mods you will find yourself owning completely different bike.

Good luck.

__________________
that is how i feel about my XTR
Mods so far:
Hyperpro front springs; Hyperpro rear shock spring; modified air box; LED tail light; LED indicators + new relay; YZ pegs; Lucas aluminum bar; brisk spark plug; snorkel removed; DNA stage 1; second hand DynoJet O2 mod; crash bars; front and rear steel braided brake lines; soft EBC brake pads; mitas 07 tyres, 2in1 Metal Mule exhaust, Blocked AIS, tall OEM screen, OTR bash plate

Hope you've ordered an O2 controller too for that full-flavoured experience?

__________________

Euhm,no... What does it do and what's the diffrence?

I have owned alot of bikes before. Everything from naked bikes to fully custom build choppers,to race bikes and even stuntbikes... Practically all I do is tear apart and rebuild bikes...
But I have to say,this XT660X is by far the must fun bike I have ever had.
I bought it as an everyday ride because I'm quite tall 1m94 and all my other bikes,specially my choppers are too small for me and give me back problems if I ride em everyday.
After spending one day on the XT I even sold my car cause it rides so well.
Finally a bike that's big enough for me!!! And the handling and brakes!!!
When you're used to riding a Harley this is heaven. After 5 corners on that thing I was allready going round the bends flat on the side,one foot sticking out and I can stop it on a penny. Only prob was a little lack of power and the awfull lawnmower sound of those huge pipes but this will be sorted soon
And the afwul blue colour... Still looking for some diffrent plastics and a black seat cover

Very true but ask yourself the question? are you in it for the long term!! because if you are buy a PC new or secondhand and don't forget the holes in the airbox you'll end up with a bike a world away from a stocker.

I plan on keeping this bike. it's way to handy as a everyday ride. But yesterday I spend over 600euro's on filters,exhaust,fuel mod and some stuff to make a tail tidy... PC is a little over the budget right now. Just spend 4000euro on that bike last week. Gotta stop somewhere before my wife kills me
besides,if so many people use the fuel mod I imagine it'll do the job not?
It's not a race bike,I use it everyday to commute.

however,I am still doubting to fit the PC. Am a little worried about damaging my engine. Anybody ever had engine troubles after using the mod and doing serious milage?

The O2 controller fixes the A/F ratio at 13.6:1 in the closed loop. Without an O2 controller the closed loop is controlled by the 02 sensor and ECU and kept to a ridiculously weak 14.7:1 in the closed loop.

The catch is, when you fit a fuelling mod, it will quite successfully control the open loop fuelling (so you can achieve an ideal 13.2-13.6:1 A/F ratio) but it will do nothing for the closed loop fuelling. Basically whenever the conditions dictate that the ECU operates in the closed loop (low rpms, small throttle openings, cruising etc.) your bike is going to be hamstrung with a weak A/F ratio.

Fitting an O2 controller will give you better control of the fuelling in all conditions - it takes it out of the hands of the ECU.

What this all means in real life (on the road) is that the bike will pull much more smoothly from lower revs and give you a much broader spread of power, as well as increasing the usable rev range of the motor.

I used Kev's fuelling mod for four and a bit years on the Tenere, covering somewhere in the region of 20K miles without the slightest problem. For the last two and a half of those years I ran Kev's O2 controller as well, again without issue. They are both brilliant mods and WILL make a big real world difference to the way your XT runs. The best thing is, they are both cheap at around �100 together - you get a lot of satisfaction for your money.

I have had a PCV and O2 Optimizer fitted for a while now, and use a custom map built on the dyno. This set up is better, but I would say from experience, only if you visit a dyno centre and get a custom built map. All in all I think it cost me around the �500 mark - not exactly cheap!

A PCV is the perfect solution, but is it �400 better than using Kev's mods? Probably not. In terms of "bang for your buck", Kev's mods are hard to beat and offer an excellent balance between performance and financial outlay.

I guess the answer to your doubts is really down to how deep your pockets are... and how tolerant your missus is!

__________________