Air box delete??

[joeroberts37]

Ryan,
Everything I've read about eliminating the Airbox says that we will lose power? How did this effect your CRF? Looking to do this on my newly aquired DRZ to make room to relocate the battery under the tail along with an undertail exhaust and custom subframe. Basically a copycat of your CRF. Also, would you build the same subframe with flat bar rear or use the new trend in street stunt and use round bar?
Thanks

[Ryan Moore]

Ryan,
Everything I've read about eliminating the Airbox says that we will lose power? How did this effect your CRF? Looking to do this on my newly aquired DRZ to make room to relocate the battery under the tail along with an undertail exhaust and custom subframe. Basically a copycat of your CRF. Also, would you build the same subframe with flat bar rear or use the new trend in street stunt and use round bar?
Thanks


http://esd-mfg.com/FIB.jpg

http://esd-mfg.com/450dirt.jpg

http://esd-mfg.com/dirtjump.jpg

http://esd-mfg.com/KissODeath.jpg

[joeroberts37]

http://supermotostunts.com/crf_450_Photoshoot/imagepages/image1.html

Assuming just for show then?

[Ryan Moore]

http://supermotostunts.com/crf_450_Photoshoot/imagepages/image1.html

Assuming just for show then?

I did 2 years of stunting on that bike, but never liked the naked look of the subframe. It was all for use though.

[solidjohnny]

hey ryan, what do you do to keep excessive fuel from coming out of your overflow? I remember reading that someone stuffed an old carb jet into the hose to limit how much can flow out, but still allows for venting.

[Ryan Moore]

hey ryan, what do you do to keep excessive fuel from coming out of your overflow? I remember reading that someone stuffed an old carb jet into the hose to limit how much can flow out, but still allows for venting.


Nothing, never had a problem.

[Zarrell]

hey ryan, what do you do to keep excessive fuel from coming out of your overflow? I remember reading that someone stuffed an old carb jet into the hose to limit how much can flow out, but still allows for venting.

got lots of problems with that on the DRZ, can't seem to find a good place to put some small container to collect the excess fuel either :hmmm:

[Ryan Moore]

got lots of problems with that on the DRZ, can't seem to find a good place to put some small container to collect the excess fuel either :hmmm:


Have you tried lowering the float bowl level? Maybe you could run the vent hose longer and up under the tank or something too.

[drexNX]

if you run a hose to maintain the tuned intake length, you shouldn't lose any bottom end or midrange. I know I didn't on my NX250.

[trafficcriminal21]

Ryan,
Everything I've read about eliminating the Airbox says that we will lose power? How did this effect your CRF? Looking to do this on my newly aquired DRZ to make room to relocate the battery under the tail along with an undertail exhaust and custom subframe. Basically a copycat of your CRF. Also, would you build the same subframe with flat bar rear or use the new trend in street stunt and use round bar?
Thanks

eliminating the air box? i just drilled 3 hloes next to snorkle and im pleased, what excatly do you mean by elimaniting

[trafficcriminal21]

eliminating the air box? i just drilled 3 hloes next to snorkle and im pleased, what excatly do you mean by elimaniting

[drexNX]

he means removing the big plastic clusterfuck that's taking up all of the space in there so he can run an undertail exhaust.

I did mine like this:
http://i49.photobucket.com/albums/f266/97whitesi/ui2ik56d69d3f80viewattth120c1e8db27.jpg?t=12409191 18
http://i49.photobucket.com/albums/f266/97whitesi/ui2ik56d69d3f80viewattth120c1f9daaa.jpg

[s_10onbagz]

I think I run the same size filter on my 50. Most of the Flat trackers run a 90 degree K&N filter if I'm not mistaken.

[Zarrell]

Have you tried lowering the float bowl level? Maybe you could run the vent hose longer and up under the tank or something too.
Hmm I don't know much about carburettors so I'd rather not fiddle with it. The biggest problem however is that it spits out oil like crazy aswell, I can live with the fuel flooding but I have to refill the oil after almost every training session. Also some fuel sips out into the airbox =S

Edit: Damn, went out ridin real long distance wheelies today and by the time I was done the airbox was filled with oil. The DRZ apparantly doesn't enjoy being vertical for a longer amount of time.

[mxsam34]

http://supermotostunts.com/crf_450_Photoshoot/imagepages/image1.html

Assuming just for show then?

moorport aint no poser, he as some bad ass skills!

[Splash4195]

Ryan when are you going to have the CRF 450 Parts like subframes in production?

[Ryan Moore]

Ryan when are you going to have the CRF 450 Parts like subframes in production?


I'm not sure, I have had nothing but problems with my cnc mills in the last 5 months, one is completly fried right now, and I just got the other one running again, $3500 later. Now I have to step backward and get caught up on Sportbike parts again. I can make a subframe like the one in the pic above right now ,but no footpeg mounts. What are you looking for beside the subframe.

[mxsam34]

I'm not sure, I have had nothing but problems with my cnc mills in the last 5 months, one is completly fried right now, and I just got the other one running again, $3500 later. Now I have to step backward and get caught up on Sportbike parts again. I can make a subframe like the one in the pic above right now ,but no footpeg mounts. What are you looking for beside the subframe.

how much will you be selling the sub frame/12 bar setup with pegs & bracket, once ya get that cnc machine going?

[TLRSKUNK]

Ryan I am in need of a subframe with removable passenger/stunt pegs and a removable back section (aka removable 12bar). I like the way your product looks but the pass pegs/ 12bar have to be removable for me to race at our local track. was wondering a cost on this set-up and aproximately how long out you would be to get it done. I am in Iraq til feb 2010 so i have time but would like to know a cost and if you can do all this for me. thanks lee

[Splash4195]

I'm not sure, I have had nothing but problems with my cnc mills in the last 5 months, one is completly fried right now, and I just got the other one running again, $3500 later. Now I have to step backward and get caught up on Sportbike parts again. I can make a subframe like the one in the pic above right now ,but no footpeg mounts. What are you looking for beside the subframe.

I'm looking for a subframe for a CRF 450 X 05 or 07? I have a regular CRF 450 06 model.

[TLRSKUNK]

get in line splash!! I asked first you prick! haha

[Splash4195]

get in line splash!! I asked first you prick! haha

Are we going to see you on the track this weekend?

[TLRSKUNK]

I wish!!! I am stuck in the sandbox til 2010 so next summer I will be there for sure. But not this summer

[j-bizzyblox]

I'm not sure, I have had nothing but problems with my cnc mills in the last 5 months, one is completly fried right now, and I just got the other one running again, $3500 later. Now I have to step backward and get caught up on Sportbike parts again. I can make a subframe like the one in the pic above right now ,but no footpeg mounts. What are you looking for beside the subframe.

ryan the pic with the sub that retains the plastics is that a stock sub with a 12 bar or a new sub with a 12 bar. I like how you retained the plastics i ride streets and want to stay as close to stock as possible i get harrassed by the coppaz in NYC enough as it is.

Did you run the bars out side the side panels/numberplate with the 12 bar

[Ryan Moore]

ryan the pic with the sub that retains the plastics is that a stock sub with a 12 bar or a new sub with a 12 bar. I like how you retained the plastics i ride streets and want to stay as close to stock as possible i get harrassed by the coppaz in NYC enough as it is.

Did you run the bars out side the side panels/numberplate with the 12 bar


Thats a complete subframe, the stock on is to flimsy to bolt anything to it. All the tubes run inside the plastic, its workin good so far, but its a bit short, so I am working on another one.

[Rob.hall]

Ryan,
Everything I've read about eliminating the Airbox says that we will lose power? How did this effect your CRF? Looking to do this on my newly aquired DRZ to make room to relocate the battery under the tail along with an undertail exhaust and custom subframe. Basically a copycat of your CRF. Also, would you build the same subframe with flat bar rear or use the new trend in street stunt and use round bar?
Thanks

If all you do is cut it out, then yes you will most likely lose power. With an open filter like that it is sucking in more air, thus requiring more fuel to run right. So what I'm saying is you just need to get the jetting right after you do it. I would ask around to see what jets you need to run because that much of a change in airflow will take some time to get the jetting right. Same story with putting say, V-force reeds on a two stroke.

[E-Loc540]

Ryan,
Everything I've read about eliminating the Airbox says that we will lose power? How did this effect your CRF? Looking to do this on my newly aquired DRZ to make room to relocate the battery under the tail along with an undertail exhaust and custom subframe. Basically a copycat of your CRF. Also, would you build the same subframe with flat bar rear or use the new trend in street stunt and use round bar?
Thanks

you may loose power in certain RPM ranges because the airbox has its own velocity stack to the carb. Any change in this stack will alter the airflow into the carb. Your intake charge runs on pulses that push each other into the carb, a change in the stack changes the strength/duration of these pulses. It is the exact same thing as an expansion chamber for a 2 stroke.

[Ryan Moore]

my bike runs exactly the same with the airbox style subframe , or without the airbox style subframe. I can't notice any change. I just like the new style with airbox so I can charge the MX track!