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The XT660X/R Air Box & Filters
There still seems to be a bit of confusion over the XT's air box. I have done a complete explanation on the air box, filters & how it all works.
The Yamaha air box is not really good for air flow. I am sure you can now see why you get good gains when fitting a DNA Stage 2 air box side filter in place of the Yamaha side cover. The stage 2 filter can supply air directly to the throttle body with no restriction. You can only just see the main filter from the throttle body side, not good for flow. You can now see why the DNA stage 3 Air box works so well with no restrictions with positive air flow & volume. Alot of riders are worried about removing the snorkel. I would recommend you to fit a stage 1 DNA air filter, these filters are oil based & repel water. Looking from the removed snorkel you can see the water drain hole into the air boxes 3rd chamber.
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Click here to join the XT Supporter's scheme Mods that I have done to my XTX's My 04 XTX Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil / [ My 07 XTX Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator / My 09 XTX 59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details Now ride a 2018 MT09SP ABS + TCS My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946 Last edited by Kev; 20-12-09 at 11:36. |
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Finally the flow tests for the filters.
Hi Guys, Following your request I have finally put together a presentation of the DNA P-Y6E04-01 Stage 1 filter compared back to back with the K&N YA-6604 Stage 1 filter, and more useful information that will help you tune the XT 660 R /X. The results are very impressive and enlightening. All the air flow tests took place the same day on DNA’s Rotronics Computerized FlowBench, the test pressure was 1,5” inches of water and the results corrected to 25� celcius. 1. Presentation of the air filters: a) Stock Yamaha air filter, single layer paper non-reusable air filter b) K&N YA-6604 air filter, 4 layer cotton oil impregnated reusable air filter c) DNA P-Y6E04-01 air filter, 4 layer cotton oil impregnated reusable air filter 2. Air Filter Design (see attached files) a) The K&N YA-6604 air filter: Media material 4 layers of K&N cotton Number of pleats 11 Pleat Height 21 mm Active Pleat length 115mm* Pleat Pitch 6,36mm* Oil volume 7ml Total active filtering surface 53.130�mm* � * as measured from the K&N sample filter we purchased. b) The DNA P-Y6E04-01 air filter: Media material 4 layers of DNA cotton Number of pleats 9 Pleat Height 31 mm Active Pleat length 124mm Pleat Pitch 10mm Oil volume 16,3ml Total active filtering surface 69.192�mm As we can see the DNA filter has larger pleat height 31mm(K&N 21mm), the pleat pitch is 10mm(K&N 6.36mm), the amount of oil DNA uses is more than double, and the most important +30.23% more active filtering surface..! for the same application. At this point I must explain that the pitch of the DNA material is calculated taking under consideration many different variables; we use a specially developed algorithm and the final design varies from application to application. Even 0.1 of a mm can make a very big difference in airflow, speed of the air stream at the surface of the filter, turbulence and many more details that we can’t mention for obvious reasons. So already from the start we have2 very different air filters! Let’s continue with the tests. 3. Absolute AIR FLOW tests: the filters are tested out of the air box on a custom made plenum; nothing causes turbulence or restrictions to the air flow (see attachments). The result is solely what the filter can give. a) Stock Yamaha Paper Air filter 70.42 CFM @ 1.5” of H�O b)K&N YA-6604 92.18 CFM @ 1.5” of H�O +30.9% over stock c) DNA P-Y6E04-01 122.4 CFM @ 1.5” of H�O +73.81% over stock +32.78% over K&N…? 4. Air Box AIR FLOW tests: the filters are tested inside the stock Yamaha air box, To eliminate the losses (restriction) that the stock throttle body could cause we used a 48.6mm throttle body without the butterfly; the absolute largest that could be connected to the XT 660 Rubber trumpet. Air box restrictions, shape, resonance, position of the air filter, if the design of the air filter suits the design of the air box and many more variables play an important role now. Also I have added the Volumetric Efficiency (VE), of the XT 660 Engine, that occurs for every configuration, if the tuner takes 100% advantage of the extra flow. a) Test 1: Air box & std filter & snorkel 46.53 CFM (1318 lit/min) VE=0.539 b) Test 2: Air box & K&N filter & snorkel 52.51 CFM (1486 lit/min) VE=0.608 c) Test 3: Air box & DNA filter & snorkel 57.19 CFM (1619 lit/min) VE=0.663 d) Test 4: Air box & DNA filter & Without snorkel 59.52 CFM (1685 lit/min) VE=0.690 e) Test 5: Air box & DNA filter & DNA Stage 2 filter & snorkel 79.19 CFM (2242 lit/min) VE=0.918 f) Test 6: Air box & DNA filter & DNA Stage 2 filter Without snorkel 79.89 CFM (2262 lit/min) VE=0.926 g) Test 7: Air box all open Without filters, side cover, snorkel (this test is for reference only the bike can’t be used on the road in this state) 88.6 CFM (2509 lit/min) VE=1.027 Finishing our detailed tests clearly the conclusion is That the DNA stage 1 filter is NOT the same filter as the K&N as the overall difference is Massive. Also you can see why the fueling must be adjusted when going stage 2 and why you can get away with it, when removing only the snorkel. I would like to thank to all the forum members for their attention, I hope everyone will enjoy the above info.
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Click here to join the XT Supporter's scheme Mods that I have done to my XTX's My 04 XTX Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil / [ My 07 XTX Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator / My 09 XTX 59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details Now ride a 2018 MT09SP ABS + TCS My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946 |
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The Stage 3 DNA Air Box is the best by far.
This new Bolt On High Performance kit, from DNA, feaures:
Part No. to order: AK-Y6E07-S3
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Click here to join the XT Supporter's scheme Mods that I have done to my XTX's My 04 XTX Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil / [ My 07 XTX Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator / My 09 XTX 59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details Now ride a 2018 MT09SP ABS + TCS My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946 Last edited by Kev; 20-12-09 at 03:01. |
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COR what a difference. Ordered a K&N filter, took the snorkel out and wallop, gutsy sound with standard pipes, loads more low down stomp and generally smoother and easier to ride
A great helpful thread, thanks guys! Tempted to do more now, but thinking that much more noise will be a pain around town
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BMW R1200S - Sports Flat Twin with attitude Yamaha XT660Z Tenere - Awesome Stonking Single France 2010 - 1760 miles in 4 days http://www.advrider.com/forums/showthread.php?t=594357 |
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Quote:
I believe the above is what you are looking for. If you need more info please let me know. Best regards, Dino |
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Thanks Dino this is what I was looking for. I seemed to deleted the link from the mod section, have since found the comparison testing between the DNA & K&N filters.
http://www.xt660.com/showthread.php?t=9848
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Click here to join the XT Supporter's scheme Mods that I have done to my XTX's My 04 XTX Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil / [ My 07 XTX Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator / My 09 XTX 59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details Now ride a 2018 MT09SP ABS + TCS My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946 |
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Help please with very poor running.
Hello Kev,
I have an 08 660x with scorpion cans runs like an on /off switch but at least a bit of acceleration now standard pipes are gone.Some questions please,does the snorkel just unbolt and if i take this off put in a dna filter and plug in a NITRO FUEL COMMANDER [can't afford a PC III or V] IF i do these mods will it run better and will i need an O2 eliminator,please advise because if i can't get it to run better it will have to go,i WANT to keep it but it runs terrible standard surges real bad,Thanks alot for any advice.gaz |
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The snorkel just pulls out,spray in WD and pull!!,I run mine with Kev's fuel mod,K+N 1 and DNA2 and no 02 eliminator, the bike runs fine.
All this info is on the site anyway,as I had pointed out too me on another site the search button is your friend |
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Sorry to be a pain, I was wondering where to drill the extra holes in the standard airbox with the snorkel removed?? Not on the side cover as that is the filtered side, so around the snorkel "hole" I guess??? Thanks thanks thanks
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(Now sold on, sob) 2011 Blue XT660X with gold wheels, was 26,500 km. Engine mods: K&N Stage 1 filter, DNA Stage 2 filter, snorkel removed, Kev fuel mod fitted. Plus: smoked Puig screen, Yam aluminium sump guard, Yamaha / Acerbis handguards, Givi Trekker aluminium side cases, Leo Vince X3 cans plus Kev front fork mod and Fender Xtender. Just fitted Michelin Road Pilot 3 tyres. SOLD the XTX for a Super Ten 1200. And just bought a Raptor 700 so staying on here for some tips.... |
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All the info is in the mod book you bought yesterday, page 284 in the XTX & XTR mod section. To answer your question the extra holes are drilled in the snorkel chamber.
__________________
Click here to join the XT Supporter's scheme Mods that I have done to my XTX's My 04 XTX Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil / [ My 07 XTX Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator / My 09 XTX 59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details Now ride a 2018 MT09SP ABS + TCS My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946 |
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