Looking at the plug is not an accurate test. If you get it dyno'd you'll find that it'll probably be running lean in certain parts of the rev range and ok in others. A quick dyno test (and if necessary a PCV or Kev's mod) is a tad cheaper than a new piston.

I was about to say that Stoo, well the bit about the dyno anyway. With uncorked Leo's I had a stoichiometric ratio of 14:1 through the whole rev range. Dangerously lean. I only ran them uncorked for the dyno run out of curiousity.

Hi, ok, so I might have a few fuelling problems, didn't think it would be that bad, Hmmm, what is the PCV mod, had a look abd understand kevs mod, might need to get this thing re mapped if that is possible, but please let me know what the PCV mod is first, thanks guys.

PCV is Power Commander V (ie.5) - you can fit a DynoJet Power Commander device to the Tenere (and the other XT660s) and it allows you to set up a custom fuel map over the whole rev range - every 250rpm if you choose... although you need a dyno machine and associated computer to do it, so best go to a dyno shop... (unless you've got a really cool garage at home?!)

It's the best way to get your fueling spot on, but the best results are also in conjunction with better airflow (ie. DNA filter and airbox lid) as the more air you can put in, the more fuel you can add, and bingo - more power!

xxx

Maybe a new topic time, but just quickly, JMo, do you know of anyone fitting a new ECU to the XT's at all? Either something DIY like a megasquirt, or up to a Wolf or MoTEC unit?

Hi Tom - sorry no, not heard of anything like that, and to be honest, I can't see that being any cheaper (or better?) than running a PC V on the stock ECU - it's plug-in and play, and you can always revert to standard should you have any unforeseen warranty issues?

I'd just reiterate how impressive a properly set-up PCV is with the stage 2 airbox, single exhaust (and O2 eliminator & AIS removal) - seriously, the bike feels properly alive now!

xxx

Yes Banksy, Adventure-Spec have borrowed my XTZ. They are making up a range of accessories for that type of bike, including a single can, sumpguard, engine bars, aux lighting, but still unsure about a tail-tidy......
I've not seen her for about 5 weeks, so I have no idea how it looks now........:Pyshic_C5UYG8:, she'll be right, I have every confidence in Wonky and his crew.

Timpo.

Megasquirt kits work about about the same price as a PCIII, but after some reading and hunting a MoTEC ECU will set you back �3k...
Reasons that being able to program the ECU is better than a PC are that whilst the PC only adjusts the fuel signal to the injectors, with a programmable ECU you can also adjust (amongst other things) the ignition curve, throttle body trim and run real time adjustments on the bike. I was hoping there would be a piece of software like Tuneboy available for the Tens, but sadly not. They only seem to specialise in SAGEM ECU's. I used it on my old Capo to really great effect. And Tuneboy is cheaper than a PC.
On your second point, absolutely, I completely agree. It's always worth doing the whole package, but where do you stop? :D

Hi JMo

I've got a PC V, an X-Racing silencer and a DNA Stage 2 air filter with the air box cover all set up in a dyno and the improvement is indeed impressive! I'm very happy with it. However I don't have an O2 eliminator. If I did, how would it affect my bike with all the mods so far? Would I gain more torque at the lower revs or all the revs or what? If I'd get one now, how much would I have to alter the PC V map that I have now (I really don't want to take it to a dyno again)?

Jami

Hi Jami - from what I understand, the O2 sensor only works on the part throttle opening (that is up to about 18% - so off-idle and low revs) to make constant fueling adjustments... once the engine revs higher than that, the main EFi unit takes over (in your case adjusted by the PCV).

If the O2 sensor is still fitted, then at lower engine speeds it will try and send a signal to the ECU, possibly conflicting with what the PCV is trying to tell it... by removing the O2 sensor (and fitting an eliminator), all you get is the PCV map the whole time.

I'm not sure it will result in any more power necessarily (I don't imagine so), only that the power curve will be smoother and not 'interrupted' at all, as it is only using the map in the PCV... I doubt you'd have to remap the PCV again, unless you were being really fussy!

I imagine Kev is your man to really explain the technical aspect of it...

J xx