Having had a fuel mod on mine to start with I'd agree with the above having a PC now fitted would I go back?? never in a million years what a fuel mod does is make the bike run quicker but it won't stop the hunting off the fuel injection and that will drive you nuts in the end.

As for paying �500 theirs me thinking you were smarter than the average bear!! mine cost me �150 all in well actually it cost less than that but I've rounded it up.

Blimey! You got a PCV, O2 Optimizer and a dyno session to build a custom map, all for �150! You're either very lucky, or very good with your money, or both for that matter! ;)

Under normal circumstances I'm well connected for engine mapping but too be honest I'll use the quote said to me last year 'Power Commanders are old hat' and if you look at the likes of Rexxer you'll understand why with no PC no installation and no need for a dyno run it's all about a direct map straight into the ECU maps have come on in leaps and bounds in the last 2 years the it's not life and death to have a dyno run anymore.

I digress I bought my PC as job lot of parts I'd seen the PC for sale I asked about the spec of the bike including the map that was in it(same as mine) anyone else can do the same I don't have to pay to put a bike on a dyno but the bike runs that well I've never bothered that was 4000 miles ago.

You will know as others with a PC there's a touch more pull from the motor but the big plus it just makes the bike a joy to ride there's no hunting from the motor it's good on the over run which brings us back to 'Are you in it for the long term' when I realised I was I took the fuel mod off and fitted the PC just one of the many things that you have to do to turn an XT in a more serious bike be it commuting or other wise.

Thank you all for the helpfull comments. I was mailing with OTR about the PCV.
A set of those in a package with a O2 optimizer will cost me about 320euro with shipping. But they tell me it is plug and play... With wich I presume I can hook it up and my bike will run well. Is it needed to go to a dyno center to have it fitted with a custom map? I don't know where there is a dyno center around here and what the cost would be to have it done...
Decisions,decisions...... so difficult. I woulden't mind spending the extra bucks if it's really worth it. I allready ordered the fuel mod and that's payed for but now I've learned that I should have the O2optimizer also witch I diden't knew. Combine those two together and I'm around 120euros. Spending another 200 on the PC is not such a huge prob alsong as it's worth it. The question is...does it make that big of a diffrence? And if I spend the extra money,will it eventually cost me more to have the custom map? Maybe I'll be able to sell the Fuel mod on the forum if I'm not using it

I would always recommend a PCV I have them on all my bikes, there is nothing better than a custom map for your own bike built on a Dyno. I build around to 15 custom maps a year on my bikes testing all sorts of performance mods, I also have a Auto Tune AT-300, Wideband commander 1 & 2 they are not as good as a custom map built on a Dyno, I have back to back Dyno results proving a Auto Tune does not map a bike as well as a custom Dyno map, I could go into all the details if you want to know but we will be here a long time.

If you have the funds the PCV is the route to go, one very important things is a map that works well in the UK that same PCV map will not work well in Australia on our fuels, every bike is different, we all live at different altitudes, we all have different ambient air temps & the most important thing that affects the A/F ratio's is the different blends of fuel in different countries & I an not talking about the RON rating, the fuel blends & additives affects the way the fuel burns in the cylinder & makes a big difference to the way a bike runs, so the morel of this story is if you chose to use a shared map chose one from your region.

Thx for all the info. For now I'll go with the fuel mod and O2 controller that I ordered from you. Exhausts should be here tomorrow and DHL just delivered my DNA stage 1&2 filters and a set of mini LED turnsignals. Just removed stock exhausts and tail. Now gonna do some cutting and make me a tiny tail... :)

Your doing the reverse to me I did one thing at a time and rode the bike to understand what was going on it's a long winded process but it worked for me and of course at some time during this process you'll start thinking 690 SMCR which is also a complication.

Sounds like a very sensible plan - you WILL notice a big difference and feel the benefits.

A year down the line, when you've got used to it and start get itchy feet, you can sell the mods and move on to a PCV and feel the difference again.

Then later, when you get the urge to tinker again, get a custom map done and feel even more difference.

I know there's always the urge to go the "whole hog", but doing things in stages keeps you interested, busy and gives you something to look forward to.

As Kev suggests, there are just too many variables involved for a generic (or shared) PCV map to work as well as a custom one. Also, when using someone else's map, you have very little idea if the tuner who built the map knew what they were doing - there is no guarantee that it was built properly. Just here on this forum we've heard a fair few tales of tuners building iffy maps due to things like failing to block the AIS, not using Tuning Link software etc. Also there is the distinct possibility that someone, post dyno run, has been tempted to have a play with the numbers in the cells of the fuel map and they've shared something different. A bit like Chinese Whispers, every time a map changes hands the likely-hood of it having been tampered with increases. I'm pretty sure most maps are a good compromise, but you can't ever be totally sure of its provenance and whether it'll be perfect for your bike and your circumstances.

Ah, but... Have you ever considered that your XT may well run EVEN better with a dyno run and custom map? You'll never know unless you bother to try! ;)

EFI is completly new to me. I'm used to working with carbs. I have a ton of jets for most carbs. Ok,it takes some time and mostly you'll end up removing and installing your carb 10 times before you get it spot on but it's what I know and it's fairly easy doing yourself in the garage...

For the guys on here in the Uk buy a second hand PC find out what map is in it from the seller and go from there way to much scare mongering going on for me I said �150 but I bought a job lot of goodies so it probably less than that like anything on ebay have patience and take your time you'll get one at the right money in the end.

Re my map your right but my R+D is on going and right at the beginning after I'd made my mind up that I wasn't going to buy a KTM I went/going through a plan of what I wanted to do,I've been the big bore with another bike and I didn't want to go that way again.

The XT motor bless it is cooking at best the 1+2 Filters snorkel out holes in the airbox fuel mod then a PC and aftermarket exhaust is straight forward trying get the enth degree out of the motor is not whats it about for me hence why I didn't chase the number 3 filter on ebay the other week the reality is it wouldn't pull you out of bed on a good day!! but how much it weighs/brakes and steers has a far greater baring on the job and while I'm getting there there's still a long way to go as I once had said to me 'It's about unsprung weight'