K&N Air Filter and Snorkel Removal
 

Fitted my K&N air filter today, and while I was at it I sliced off the snorkel from the airbox lid. The difference is quite dramatic, in throttle response and flexibility especially. The pipes I have fitted probably help too (akrapovic's), but letting the engine breathe seems to have paid off. Ideally a PCIII would be next on my shopping list, but I don't think they're available yet. For now though, I'm well pleased!! :toothy5:

Thanks for the feed back.

Snorkel removal - Jetting
 

Hi!

Did you adjust the "jetting"?
I haven�t found any CO-setting on the Z.... adjust TPS? Resistor in the temp sensor line? It�s not good if the motor runs too lean.. //MC

Wow Tenere Doug, thanks for doing this and giving us feedback on the mod. I would be very interested in how the fuel consumption changes.

Call me completely untechnical and my physics didn't score very well in high school. I remember one said that if I have such K&N airfilter or any mods that "improves" the airflow, therefore, the fuel consumption would increase, 'more air burns more fuel', that's the logic. I thought about it a lot, and came to speculate that first we need oxygen, spark, and combustible materials to make a fire. If the spark is constant, then the amount of oxygen and combustible materials needed should be the same, so if more oxygen, less combustible materials needed, and vice versa. So wouldn't more airflow actually decrease the amount of required combustible materials which are gasoline in our cases here, assuming we hold the size of the fire or in our cases the power from the engine constant? Why I hold the power from the engine constant, because the fuel injection senses how much fuel the engine needs in order to keep the idling speed at 1500rpm on one hand, and the presumably optimal amount of fuel depending on the throttle position on the other. The fact is I have tried both the stock and K&N filter, and I have found the stock filter actually eats more gas than the K&N filter, but I just couldn't quite get my head around it. On power commander, am I correct that its main function is to manage the smoothness of power delivery but not so much on increasing power at any rpm?

Please keep us posted on how your gas consumption goes. Much appreciated.

I was thinking about the air filter set up on the Ten last night after adjusting the chain. The plastic side panel I can't see being hideously expensive, and the DNA stage 2 filters for the X and R's is basically a sidepanel with a filter in to allow more air in, so it wouldn't be too hard to make a sidepanel with some filter in to give more air surely?
Now the problem comes with setting the fuelling as I don't think the XT ECU's are reprogrammable like the SAGEM ones on my old Caponord, KTM's etc. This is where the PCIII comes in, as it sits between the ECU and the injectors and changes the signal to the injectors. Only changes the fuelling, not the ignition sadly.
Are there K&N or DNA filters available for the Tens?

yup,

http://cgi.ebay.co.uk/YAMAHA-XT660Z-TENERE-660-2008-K-N-Air-Filter_W0QQitemZ190288095423QQcmdZViewItemQQptZUK_ Motorcycle_Parts?hash=item190288095423&_trksid=p32 86.c0.m14&_trkparms=66%3A2|65%3A1|39%3A1|240%3A131 8

http://www.dnafilters.com/filterdeta...p?filterid=416

Yes, I have a DNA and Tenere Doug has a K&N. My DNA is no different from the stock, except that the thin alu surface around clearly allows much more air through than the stock. Mind you the Tenere's airfliter is located under the seat without any access from the side panels. One must lift off the seat in order to get to the airfilter. I am sure you know that, but I just want to clarify that we are on the same page.

Cheers guys, I did my usual and asked a Q without having a look first.
Josephau, yup I know how to access the filter thanks. I had a good look when I was draining the breather tube, hence thinking about the sidepanel filter.

edit to add- the calsport vendor in peatbog's link here is cheaper on ebay than in their shop. Though in their shop they have remus pipes for the Ten...including a de-cat y-piece.

Additional edit to add...bought one ;)

Oooo they do K&N oil filter for the Ten too..... and hardly expensive either

http://cgi.ebay.co.uk/K-N-Oil-Filter...742.m153.l1262

I guess it depends on where you ride, but doing this would lower your wading depth, and I think I'd be concerned with water ingress in heavy rain, it does stream acrosss the side panel - when it's biblical, like it usually is up here!

I did it to my TTR, gave loads more response, but I lost too much depth in water, so I replaced it with the stock one.