Jump to content
Sign in to follow this  

Smog delete and vent kit

Recommended Posts

I just purchased the Applied Racing Smog Delete Kit in preparation of the standard "free" mods that I will be doing to my 450X this week. However, when I went to the Applied site to order the kit, it recommended the "vent kit" as well. Of course, I purchased it , but I don't know what the heck it really does. Has anyone out there installed this kit? What were the results/ what does it really do. All I can tell is that it puts a filter in-line with the crankcase breather to prevent oil mist from entering in to the carb for burning? So, is the intent to prevent fouled plugs and prevent the motor from burning oil???? Does anyone know???? :thumbsup:

Share this post


Link to post
Share on other sites

The kit re-routes the crankcase vent from the air box, to the little silver filter supplied with the kit. The benefit is that your crankcase will be able to vent properly. The stock set-up is severely restricted. See photo.

mo_crf012.jpg

This is a smog thing, intended to restrict the amount "oil vapor" exiting the air box into the atmosphere. In other words, EPA bull$hit. When your piston cycles up and down, it displaces the same 449cc's that is does above it, and the vent is to allow that pressure a place to go. Without it, one can easily understand the internal resistance that occurs inside the engine. This subtracts directly from power output, and has other negative effects. You get the picture.

If you really want to properly vent your crankcase, do could do this:

mo_crf001.jpg

The gray hose is the smog valve hose you are going to remove, and the filter is a UNI filter available at your LBS. Short, large diameter free breathing, and inexpensive. Be sure to plug the hole in the airbox whichever way you go. It is on the engine side of the air filter.

Don't let anyone try to give you a snow job about how the stock vent is some magic calibrated Honda vacuum thing. That is bull$hit. Physics aside, empirically the same mod is worth approx. 1/2 H.P. on a KLX300, so the 450 being 50% more displacement, it could be (porportionally) worth 3/4 H.P. on you Honda.

Enjoy. :thumbsup:

Share this post


Link to post
Share on other sites
The benefit is that your crankcase will be able to vent properly.

Yeah, those engineers - you know, the ones who can be credited for Honda selling more motorcycles in the world than any other company - don't know how to properly vent a crankcase. However, some small little company out of Temecula, Ca has it all figured out.

the same mod is worth approx. 1/2 H.P. on a KLX300.

Well, that's why it's not a Honda...Duh! :thumbsup:

No one has ever claimed that the KLX300 is a performance machine. No one. Really. Not ever. Sure Kawi left a lot of power on the bench. So you're betting that Honda would leave that much horsepower because Kawi couldn't figure it out?

Instead of just guessing - and giving us a snow job - give us some useful facts.

Iromine,

Of course Applied would recommend their crankcase breather kit. They sell it, therefore they think you should buy it. It's been hashed to great extents on this board and others, and from what I can remember, there has been no benefit actually - not theoretically - found.

Share this post


Link to post
Share on other sites

Honda does know how to vent their cases. Look again, it is an EPA mandated smog thing. The effect is the same no matter what bike it's on. A four stroke engine is a four stroke engine. Do your research before trashing someone's post.

It's a free country- you do what you want, and I'll do mine my way. Everyone else can decide for themselves. :thumbsup:

Use the Applied kit, leave it stock, or use your imagination, (by the way, I AM an engineer by profession). So I am not a dumbass. This forum is supposed to be for exchanging ideas, so why the personal attacks? :thumbsup:

Sorry, Iromine, for the above hassle. You may want to check out www.crfsonly.com. The maturity level there is generally a little higher.

Enjoy. :bonk:

Share this post


Link to post
Share on other sites

No bash personal intended! I felt that you only gave him an opinion based on a guess. And I still do. If you're an engineer, I would have expected a little more factual relevance. They don't give advice based on hunches from unrelated products.

And as for crfsonly - yes, there's lots of good info there, too (I post there, but under a different name), but many answers are questionable just the same (despite the authors' high post count). So you almost have to already know the answer to see through the bs. Many newbies to both here and there accept the group majority opinion as fact, expanding on the mistruths, and while many of the folks at Honda are laughing at the common beliefs.

However, you are correct in that we may do as we please (for the most part, of course - no loud pipes, damn it!). I understand, not all of the modifications we do have have a purpose other than for looks or as conversation pieces.

I've read many of your posts, and you often offer good advice. However, I noticed you've been fighting this crankcase breather vent to death, all merely based on your experiences with an old Kawi (although a very nice bike in its day). I apologize if my posts offend you.

Share this post


Link to post
Share on other sites
No bash personal intended! I felt that you only gave him an opinion based on a guess. And I still do. If you're an engineer, I would have expected a little more factual relevance. They don't give advice based on hunches from unrelated products.

And as for crfsonly - yes, there's lots of good info there, too (I post there, but under a different name), but many answers are questionable just the same (despite the authors' high post count). So you almost have to already know the answer to see through the bs. Many newbies to both here and there accept the group majority opinion as fact, expanding on the mistruths, and while many of the folks at Honda are laughing at the common beliefs.

However, you are correct in that we may do as we please (for the most part, of course - no loud pipes, damn it!). I understand, not all of the modifications we do have have a purpose other than for looks or as conversation pieces.

I've read many of your posts, and you often offer good advice. However, I noticed you've been fighting this crankcase breather vent to death, all merely based on your experiences with an old Kawi (although a very nice bike in its day). I apologize if my posts offend you.

No problem. It is amazing how much debate the crankcase breather issue raised. Like seven pages if I recall. I am going to let it die. I'm with you on loud pipes.

Enjoy :thumbsup:

Share this post


Link to post
Share on other sites

Maybe I'm being over-sensitive, but "some little company in Temecula" purchased a CRF250 and 250X when they were first available. The drain tube would fill up with a mixture of fuel and oil every 2 tanks of gas. We are not required to control emissions like "those engineers - you know, the ones who can be credited for Honda selling more motorcycles in the world than any other company" Who USED to vent into atmosphere, by the way.

We simply found something that could be done better and did it. I'm sure Honda didn't do it for any other reason than they had too.

We never claimed any performance increase, that is just plain silly, all we claim is:

"With this trick billet aluminum filter system you can re-route the crankcase vent house on your CRF to eliminate oil mist and crankcase contaminants from entering directly into your carburetor."

http://appliedrace.com/store/catalog/product_info.php?products_id=1447

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

  • Similar Content

    • By mikesbaron
      2005 CRF450X:
      Stalled my bike on an uphill single track, tried to start it and it would not start. Pushed it off the mountain solo (took me 3+ hrs to cover 3.5 miles!). At home tried spark plug to frame to see if I get a spark and nothing. Not even on multiple plugs. I did see what I thought was a super weak spark for about a millisecond and then it was gone, no longer to be seen.
      Before I pay for a new coil, how can I check it? What other pieces on this thing should I be checking for? I checked all the wiring and the main fuse near the battery. I have horn power and rear LED taillights working just fine. Bike wll not start with e-start or kick start of rolling it down a hill.
    • By TheVolta
      2006 Honda CRF450X 
      Extremely clean and well maintained 2006 CRF450X
      oil changed after every two rides. Starts right up with no issues.

      Upgrade parts list: 
      IMS 3.2g Extended Gas tank 
      Noguchi Seat (Same seat used by HRC Dakar bikes) 
      Renthal Fat Bar
      FMF Powerbomb Header and Pipe
      Highway Dirtbike Guards 
      Renthal Clutch/Hotstart Intellilever
      Renthal Brake Intellilever
      Honda Airbox Mod 
      Speed Cell Lithium Battery 
      Acerbis Skid Plate
      Acerbis
      EK Did Chain and Brand new Sprocket set 
      R&D Flexible Carb adjustment screw
      07+ Headlight Conversion 
      Black Fork Guards 
      OEM and JRC Plastics 
      Spare parts included / original tank / New Rear fender/ OEM Exhaust/ Original Sprocket set/ OEM Bars / Filters


      **Willing to adjust price without OEM Handle Bars in place and no HWDB Guards. **
      Paypal and Venmo Accepted.
    • By Colin Greis
      ALL HELP appreciated.
      Bike: 2006 CRF450x Supermoto
      Back story: about 3 weeks ago went down on the pavement the bike landed on the left side, nothing broken other than bent shifter and a broken foot peg bolt. [to what I can see]. Rode home the bike (in pain) the bike sat for about 3 weeks while I let my body heal and worked on getting out the broken bolt and replacing the bent shifter. 
      [Bike and Body ready to ride again]  The following ensues.
      Day 1: Started the bike up no problem using the electric start (seemed little bit louder than normal) rode down the street after about 5-6min of riding bike started to bog and wanting to die after slowing down for a red light the bike died. Would not start electric start or a kick, had to do the walk of shame and push the bike out of the road traffic. Got the bike started back up 5 mins later with choke on and on the ride home the same thing happen once more. 
      That night did a oil change and looked at the coolant [ full to the brim]
      Day 2: After thinking about it... thought maybe my idle screw messed up from the crash. started to messed with the idle and the fuel screw. This seemed to some what help and got a quick 15min ride in no problems running a bit rich maybe had some backfires.  
      Day 3: Added slip on FMF muffler that I ordered to replace the other crappy aftermarket muffler. took the bike out side and the electric start didn’t work just clicked away.. the bike started with the choke on using the kick start. [did not want to start as easy as it always does AT ALL] bike idled high for 1 min while I tinkered with the idle and fuel screws again, noticed smoke coming from the water pump area [front lower right] a plastic tube was touching the water pump maybe causing the smoke. turned off bike immediately. after the bike was off a small bit of white smoke was coming out the exhaust [not like oil smoke like (fire-ish) smoke maybe due to the brand new slip on.]
      So... what does everyone think whats my next move. 
      Did I clog up my radiator when I a crashed?
      Break my water pump?
      Is the bike overheating?
      mess up my fueling?
      Please let me know! thank you.
       
    • By Bryan Bosch
      FOR IMMEDIATE RELEASE
      Honda Broadens CRF Lineup with Expansive New-Model Launch
      Largest performance off-road release yet includes new models for diverse applications

      IRVINE, Calif. (May 23, 2018) – During a recent “CRF Collective” unveiling ceremony at Fox Racing headquarters, Honda announced its most far-reaching range of performance off-road models ever, expanding the group by three and significantly improving the four returning models. Leveraging the brand’s unparalleled experience in the manufacture of dirt bikes, Honda’s performance off-road lineup now includes CRF machines for riding applications including motocross, closed-course off-road, pure off-road, and even dual sport.

      All seven models are based on the platforms of Honda’s revolutionary motocrossers, the CRF450R and CRF250R. Those two machines return for 2019 but with important updates, as does the closed-course off-road CRF450RX. In addition, Honda is offering a factory-replica version of its full-size motocrosser called the CRF450RWE (“Works Edition”). The trail-ready CRF450X is entirely new for 2019, and it’s joined by a road legal CRF450L that enables customers to connect trails via asphalt. Finally, Honda is also introducing an all-new CRF250RX closed-course off-road machine.
       

       
      CRF450L Dual Sport
      The trails are calling, and the all-new road-legal CRF450L answers, expanding customers’ off-road possibilities by enabling access to the best riding trails, even when that means connecting them via asphalt roads. Street legality is achieved via features like LED lighting, mirrors, and a dedicated exhaust system. Equally at home in the woods or desert, the CRF450L has a wide-ratio six-speed transmission for maximum adaptability, while a lightweight, 2.0-gallon tank offers great range. Compared to the CRF450R motocrosser, crank mass is up for tractability in technical conditions, where a large-capacity radiator keeps things cool.
      Color: Red Target Price: $10,399 Availability: September Info: https://powersports.honda.com/2019/crf450L.aspx >>> More pictures, video, specs & discussion on the 2019 Honda CRF450L <<<


       
      CRF450RWE (Works Edition)
      For the 2019 model year, you don’t have to be Ken Roczen to enjoy a CRF450R with factory enhancements, as the new CRF450RWE features a number of upgrades based on the bikes in the Team Honda HRC race shop. Rocketing to the top step of the podium through the use of a specially designed cylinder head with hand-polished ports, Yoshimura titanium slip-on muffler, and special ECU settings, this new model offers increased low- and mid-range torque. It also features the same graphics as Roczen’s No. 94 race bike, including a Throttle Jockey factory seat cover. Upgraded black D.I.D LT-X rims are included, along with black triple clamps and a gold RK chain. Titanium nitride-coated fork legs and an updated, titanium nitride-coated shock shaft increase traction and bump absorption.
      Color: Red Price: $11,499 Availability: August Info: https://powersports.honda.com/2019/crf450r.aspx

       
      CRF450R
      Already the industry’s top-selling motocrosser and the winner of the 2018 Daytona Supercross at the hands of MotoConcept’s Justin Brayton, the CRF450R receives a number of important updates for 2019. Better engine performance is achieved through a new combustion-chamber shape, as well as improved over-rev characteristics through a refined oil-management system. The frame and swingarm have been revised for optimized rigidity and weight reduction, while the braking system has been updated with a lightweight front brake caliper featuring a large-piston design. As a result of the weightsaving measures, the CRF450R is 1.76 lbs. lighter than its predecessor. For added performance and increased comfort, the 2019 model features new ECU settings, HRC launch control, a Renthal Fatbar® handlebar and adjustable handlebar position. Black rims and redesigned fork protectors are also new. This is how you convert the “Absolute Holeshot” into moto wins.
      Color: Red Price: $9,299 Availability: August Info: https://powersports.honda.com/2019/crf450r.aspx

       
      CRF450X
      Having featured heavily in Honda-mounted teams winning 20 of the last 21 Baja 1000s, the CRF450X gets a complete overhaul for 2019, based on the modern CRF platform but with off-road-appropriate features. A true off-road machine that’s ready for racing or trail riding, this model features a headlight, taillight, and side stand, as well as an 18” rear wheel and lightweight 2.0-gallon fuel tank. For maximum versatility in challenging terrain, the CRF450X also features a 49mm Showa fork with dedicated settings, wideratio six-speed transmission, and higher crank mass than the CRF450R.
      Color: Red Target Price: $9,799 Availability: October Info: https://powersports.honda.com/2019/crf450X.aspx

       
      CRF450RX
      Currently campaigned by JCR Honda’s Trevor Bollinger and Trevor Stewart in GNCC and WORCS competition, respectively, the CRF450RX inherits the same performanceenhancing features of the 2019 CRF450R, including an updated cylinder head and refined oil-management system, while still featuring off-road-specific features like a 2.2gallon resin fuel tank, 18-inch rear wheel, and aluminum side stand. Suspension is specially tailored to the CRF450RX and uses low-friction fork oil. For added performance and increased comfort, the 2019 model features new ECU settings, HRC launch control, a Renthal Fatbar handlebar, and adjustable handlebar position. Black rims and redesigned fork protectors are also new.
      Color: Red Price: $9,599 Availability: September Info: https://powersports.honda.com/2019/crf450rx.aspx

      CRF250RX
      Based on Honda’s successful 250cc motocrosser, the all-new CRF250RX joins the CRF450RX as a weapon for closed-course off-road competitions throughout America. Equipped with a larger-capacity, 2.2-gallon resin fuel tank, 18-inch rear wheel, and aluminum side stand, the RX makes quick work of challenging situations, its dedicated suspension and ECU settings helping the rider work through even the toughest trail sections. As with the CRF250R, HRC launch control, a Renthal Fatbar handlebar, and black rims are standard.
       
      Color: Red Target Price: $8,299 Availability: September Info: https://powersports.honda.com/2019/crf250rx.aspx

       
      CRF250R
      Newly introduced in 2018, the CRF250R has seen the GEICO Honda and TiLube Honda teams earn multiple wins in AMA Supercross and Arenacross competition, respectively, while also achieving success in amateur national races. For 2019, the model is revised with increased low-to-midrange engine performance for improved corner exiting. Inspired by the factory version, the Double Overhead Cam engine features updated cam profiles
      and intake- and exhaust-port profiles, a 50mm shorter right exhaust pipe, and a 2mm smaller throttle body. Riders can select from three engine modes for ideal performance depending on conditions, while HRC launch control has been adopted for improved race-start performance. A Renthal Fatbar handlebar sits in a four-position-adjustable top clamp, while the braking system has been updated with a lighter, CRF450R-inspired caliper with larger piston for optimum braking performance. Black rims are standard.
      Color: Red Target Price: $7,999 Availability: September Info: https://powersports.honda.com/2019/crf250r.aspx

       
      CRF150R / CRF150RB
      Raced by Amsoil Honda hotshot Hunter Yoder on the amateur national circuit, Honda’s smallest motocross machine returns for 2019, featuring a Unicam four-stroke engine thatoffers a spread of ample, useable power and torque across the rev range. Suspension duties are handled by Showa, with a 37mm inverted fork and Pro-Link rear link system. In addition to the standard version, Honda offers the CRF150RB, which features larger
      wheels, a taller seat, a longer swingarm, and more rear-suspension travel.
      Color: Red Target Price o CRF150R: $5,099 o CRF150RB: $5,399 Availability: August Info: http://powersports.honda.com/2019/crf150r.aspx
       
      ABOUT AMERICAN HONDA
      American Honda Motor Co., Inc., is the sole distributor of Honda motorcycles, scooters, ATVs and Side-by-Sides in the U.S. American Honda’s Motorcycle Division conducts thesales, marketing and operational activities for these products through independent authorized Honda retail dealers. For more information on Honda products, go to powersports.honda.com.
    • By moneypit
      Hello all. I just wanted to get some other crf450x owner input on something my brother noticed on my new bike. So this is on a newly purchased 2017 crf450x with about 4 miles on it currently. while riding around with my brother in my inlaws yard he pointed out that the head pipe was starting to glow red. I'm wondering if this is because the bike is new and is a bit hotter due to breaking in or if there is possibly a different issue going on with this new bike. Most of what i read suggests a lean issue presenting it self with the carb. i just installed a trail tech vapor kit on the bike but i doubt that would influence anything.  Any help would be greatly appreciated. hopefully this wont abort our first trip out to go ride it this weekend.  
×