Air Filter Extension Pipe, Like ESR's Kit

[thedeatons]

I notice there is little room between the rear shock and frame. I don't mind installing a filter here anyway, but saw ESR's kit and began wondering about it.

Anyone used it? Benefits? Drawbacks?

It looks like a straight pipe rubber booted onto the carb. I am used to using velocity stacks to speed up the intake air charge...

[Honda 250r 001]

benefits. cold air intake. downfalls. sand and water gets in the filter WAY easier and you have to watch it closely!

[mfr422]

I have them for my two R's, I only use them when duning and they work great as long as you run an outerware.

[dunatic]

use your stock air box intake boot and the stock sized filter. there is a guy on ebay that makes a killer adapter that simulates the front end of the airbox.

http://cgi.ebay.com/ebaymotors/Honda-TRX-250R-Air-Filter-Bracket-Box-Eliminator-250R_W0QQcmdZViewItemQQ_trkparmsZ72Q3a570Q7c66Q3a5 Q7c65Q3a12Q7c39Q3a2Q7c240Q3a1318QQ_trksidZp3286Q2e c0Q2em14QQhashZitem290296404179QQitemZ290296404179 QQptZMotorsQ5fATVQ5fPartsQ5fAccessories

the advantage is that you get the velocity effect of the funnel shaped intake tube and the HUGE air filter surface area.

[thedeatons]

Do you happen to have any more pics of that setup? The guy only has one small pic.

Looks intrigueing, however I am running a 39mm PWK, and am concerned about using anything that came with the stock airbox (think restriction).

I am a duner by the way.

[dunatic]

ask the seller to send you more of a close up.

the OEM air boot and filter is going to be bigger then any ESR setup youll buy.

[derby]

Originally posted by dunatic
ask the seller to send you more of a close up.

the OEM air boot and filter is going to be bigger then any ESR setup youll buy.

I agree with dunatic on what he said. Also the kit on ebay holds the setup in place. The esr kit will flop around unless you zip tie it to the frame, but then it looks bad and wears the filter out from rubbing on the frame.

Your 39mm will fit. I have used the 40.5mm for a long time. Or you can get the billet rings from esr to reduce the od of the carb. They will have to be pressed on.

[thedeatons]

Seller doesn't have any more pics....:rolleyes:

So I need a stock airbox inlet boot to go from my 39mm PWK to that bracket? Yes?

[dunatic]

yes...get a 86 model without the resignator.

[wes350x]

I have the exact setup on my bike, Ill try to get some pics.



Originally posted by dunatic
use your stock air box intake boot and the stock sized filter. there is a guy on ebay that makes a killer adapter that simulates the front end of the airbox.

http://cgi.ebay.com/ebaymotors/Honda-TRX-250R-Air-Filter-Bracket-Box-Eliminator-250R_W0QQcmdZViewItemQQ_trkparmsZ72Q3a570Q7c66Q3a5 Q7c65Q3a12Q7c39Q3a2Q7c240Q3a1318QQ_trksidZp3286Q2e c0Q2em14QQhashZitem290296404179QQitemZ290296404179 QQptZMotorsQ5fATVQ5fPartsQ5fAccessories

the advantage is that you get the velocity effect of the funnel shaped intake tube and the HUGE air filter surface area.

[dunatic]

I did too, but I cant find the pics

I had a whole bunch of different angles too

[Honda 250r 001]

the esr flops around? you could get a duncan kit. i dont know if it flops around but it could be better.

[mfr422]

I made tabs to go under the clamps for mine and then tied them to the frame, no flopping. I don't like the ebay setup because of the stock boot. If your running a carb bigger than a 36 it's just too restrictive. I had that setup at first until I found the esr kit. they're kit is worth about 2-3 bike lengths in a drag race on my stock cyl bike with my 38mm airstryker over the stock boot. Not to mention the pain in the a@### the stock boot is to put on the larger carbs. On my lrd chassis, I didn't need the frame clamp because the frame is so much larger it holds the filter between it and the shock. I looked and don't have any pictures of my setup either:( . I put mine on for our dune trips a couple of times a year and my lrd is apart for powdercoat. If you do go with the stock boot, be sure and get a brand new one or you'll never get it over that 39.. Hope this helps, Lonny

[wes350x]

here's some pics

[wes350x]

another

[thedeatons]

That part looks great! If only someone made a better boot....!!!

Wonder if someone could get something going in a large diameter silicone radiator hose?

On that note what about the boot going from the carb to the reed cage... Any restriction or tricks there?


THANKS FOR COMING THROUGH WITH PICS GUYS!

[danhung11]

Anyone ever try that mount (from eBay) with an ESR Centermount pipe/silencer? I am having a heck of a time getting the ESR Airbox Eliminator Kit to mount up with my Arens frame, Boyesen Rad Valve, and 38mm A/S. The bend on the Rad Valve is shooting the end of the carb into the frame and no way to mount it up. I have thought about buying that UPP and seeing if there is enough give and run V-Force 3 reed cage. Check out the pics and you will see what I am talking about. Thoughts anyone?

http://i223.photobucket.com/albums/dd228/danhung11/000_1433.jpg
http://i223.photobucket.com/albums/dd228/danhung11/000_1434.jpg
http://i223.photobucket.com/albums/dd228/danhung11/000_1430.jpg
http://i223.photobucket.com/albums/dd228/danhung11/000_1431.jpg
http://i223.photobucket.com/albums/dd228/danhung11/000_1432.jpg

To answer your original question, I didn't have any problems with the ESR Airbox kit with a stock frame, pyramid reed cage, and stock air intake boot. It ran good and had plenty of air. As long as you run a pre-filter and avoid mudholes or creeks, you should be fine. Not too much water can go under the seat unless it's a pond. :ermm:

[thedeatons]

#1 Flexing the boot a bit to fit things up? Possible?

#2 Reangling the reed cage inlet using a grinder?

Just thoughts off the top of my head.

My Laeger Pro-Trax 265 has a 39mm PWK that originally went to the stock airbox, using a VForce 3 cage. So my setup must be different regarding the angles and such.



***Hey good point about the ESR centermount exhaust. I would not be able to get one if I ran that dudes plate.... It needs a longer right side tab extending down, so you can mount the brake reservoir on the right side, then cut out the middle where they have the reservoir mounted, so the ESR pipe can go through there.

[thedeatons]

Hey, what brand are those white donuts with o-rings on them? The stops for the airbox? Nice and clean looking!

[danhung11]

Originally posted by thedeatons
#1 Flexing the boot a bit to fit things up? Possible?

#2 Reangling the reed cage inlet using a grinder?

Just thoughts off the top of my head.

My Laeger Pro-Trax 265 has a 39mm PWK that originally went to the stock airbox, using a VForce 3 cage. So my setup must be different regarding the angles and such.

***Hey good point about the ESR centermount exhaust. I would not be able to get one if I ran that dudes plate.... It needs a longer right side tab extending down, so you can mount the brake reservoir on the right side, then cut out the middle where they have the reservoir mounted, so the ESR pipe can go through there.

Looking at the pics again, the eBay plate won't work. Look where the pipe connects to the silencer - it's in front of where that plate mounts. As far as grinding the reed cage, I don't grind on stuff like that. The stock air boot can be somewhat formed with heat or boiling water but it will somewhat return to shape.

[danhung11]

Originally posted by thedeatons
Hey, what brand are those white donuts with o-rings on them? The stops for the airbox? Nice and clean looking!

PM x.system, he sells them. He makes them on a lathe out of delron. They are trick and won't fall off. The seat latches on snug. He also makes delron self lubricating swingarm pivot bushings. Very nice! ;)

[wes350x]

[QUOTE]Originally posted by danhung11
[B]Anyone ever try that mount (from eBay) with an ESR Centermount pipe/silencer? I am having a heck of a time getting the ESR Airbox Eliminator Kit to mount up with my Arens frame, Boyesen Rad Valve, and 38mm A/S. The bend on the Rad Valve is shooting the end of the carb into the frame and no way to mount it up. I have thought about buying that UPP and seeing if there is enough give and run V-Force 3 reed cage. Check out the pics and you will see what I am talking about. Thoughts anyone?

Just looking at it I dont think it would work. My set up right now is vf 3 reeds, cr boot, 38 A/S, and factory boot (I guess) going into the air filter mount. Ive used the aluminum intake off of ebay and it works well also, but Ive heard a few talk bad about the intake. Personally I thought it worked well. Try a boot from a cr, with a diffrent reed set up, the angle is a bit diffrent from the trx but mine worked well, but I have a factory frame.

[danhung11]

Originally posted by wes350x
[QUOTE]Originally posted by danhung11
[B]Anyone ever try that mount (from eBay) with an ESR Centermount pipe/silencer? I am having a heck of a time getting the ESR Airbox Eliminator Kit to mount up with my Arens frame, Boyesen Rad Valve, and 38mm A/S. The bend on the Rad Valve is shooting the end of the carb into the frame and no way to mount it up. I have thought about buying that UPP and seeing if there is enough give and run V-Force 3 reed cage. Check out the pics and you will see what I am talking about. Thoughts anyone?

Just looking at it I dont think it would work. My set up right now is vf 3 reeds, cr boot, 38 A/S, and factory boot (I guess) going into the air filter mount. Ive used the aluminum intake off of ebay and it works well also, but Ive heard a few talk bad about the intake. Personally I thought it worked well. Try a boot from a cr, with a diffrent reed set up, the angle is a bit diffrent from the trx but mine worked well, but I have a factory frame.

What year CR boot? Can you get a picture of the angle of it? I think the boyesen has a greater bend in it. :ermm:

[wes350x]

I think the boot is from an 87 model.

[matt250r21]

Dan, that CR250 rad vavle is your problem. I had one and hated it so much that I sold it because the angle shoots the carb boot right into the frame rail. I know you already know this. I switched to a V Force 3 reed cage and a OEM Honda 1998 CR250 reed cage boot. With this set up the carb angle is a lot better then with the rad valve. Keep in mind that I have a Laeger frame, so it might not work as well with your Areans.

[thedeatons]

What is the deal with the CR boots guys? Spill it?

[danhung11]

Originally posted by matt250r21
Dan, that CR250 rad vavle is your problem. I had one and hated it so much that I sold it because the angle shoots the carb boot right into the frame rail. I know you already know this. I switched to a V Force 3 reed cage and a OEM Honda 1998 CR250 reed cage boot. With this set up the carb angle is a lot better then with the rad valve. Keep in mind that I have a Laeger frame, so it might not work as well with your Areans.

Matt, do you run a reed spacer?

BTW - thanks everyone for the help and I hope everyone is learning something!

[matt250r21]

Nope, no reed spacer on my setup.

The CR250 boot is made to fit 38mm and up carbs and it is a little bit shorter then the standard TRX boot. This brings the carb closer to the intake of the engine which can help with mid to topend performance. That is if you dont run a reed spacer, most people end up running a reed spacer with the CR250 boot because it is shorter and their airbox boot will not reach the carb.

[danhung11]

Originally posted by matt250r21
Nope, no reed spacer on my setup.

The CR250 boot is made to fit 38mm and up carbs and it is a little bit shorter then the standard TRX boot. This brings the carb closer to the intake of the engine which can help with mid to topend performance. That is if you dont run a reed spacer, most people end up running a reed spacer with the CR250 boot because it is shorter and their airbox boot will not reach the carb.

This what I need? #9? What's up with the fins on the side?

[matt250r21]

Those are reed stuffers. They fit into the OEM Honda reed cage. To use that year CR250 boot on a VForce cage the stuffers must be cut off.

I had to cut the stuffers off the 98 CR250 boot to make it work with the Vforce cage.

I read somewhere that 88-89 CR250 reed boots work as well as the newer year boots but do not have any stuffers that need to be cut off.

[danhung11]

Originally posted by matt250r21
Those are reed stuffers. They fit into the OEM Honda reed cage. To use that year CR250 boot on a VForce cage the stuffers must be cut off.

That's a 98CR250R I pulled off Babbit. Can you get the part # I need to use with V-Force or did you have to cut the tabs off too?

[thedeatons]

My thread has been taken over.... LOL... I placed my needs in the CR 250 Intake Boot thread....

[danhung11]

Originally posted by thedeatons
My thread has been taken over.... LOL... I placed my needs in the CR 250 Intake Boot thread....

I apologize for jacking this, I thought you were interested as well. :o

Matt, can you email me? danhung11@gmail.com

Thanks again all.
Dan

[thedeatons]

No, I am interested.... I was kidding.

Sorry from me too, I am new to 250Rs, and have SOOOO many questions. Feel free to keep going, I just have questions that are a bit different!

Good info! Keep it up!

[thedeatons]

So, for my question it looks like I need:

1986 boot from the carb to the airbox
My own plate with right side clearance for centermount pipe
My choice of TRX250R air filters

That should work with my 39mm PWk right? Think that is the best setup for dunes? I know the filter is fat enough, but am curious about the intake boot going to the carb. Restrictive?

This setup seems a lot better than a long skinny filter mounted on the carb with the oily filter hitting the frame and rear shock all the time.

[312R1]

Originally posted by thedeatons
So, for my question it looks like I need:

1986 boot from the carb to the airbox
My own plate with right side clearance for centermount pipe
My choice of TRX250R air filters

That should work with my 39mm PWk right? Think that is the best setup for dunes? I know the filter is fat enough, but am curious about the intake boot going to the carb. Restrictive?

This setup seems a lot better than a long skinny filter mounted on the carb with the oily filter hitting the frame and rear shock all the time.


James,

Here is my set up with a 39 PWK...Pyramid reed cage OEM boot from the reeds to carb then a 86 boot from the carb to my CFM airbox and a K&N filter.

Here are some pic's of the set up if you would like some more or different angle's just let me know.
-Steve


http://i43.tinypic.com/149tb2p.jpg
http://i41.tinypic.com/2wfvitt.jpg
http://i41.tinypic.com/2ithra8.jpg

[thedeatons]

Thanks Steve, VERY nice setup, however I don't want the full surround. EXTREMELY nicely done though!!!

I appreciate the pictures and quick response. Tonight the intake tract was on my mind and I wanted to get this settled once and for all.

James

[312R1]

Originally posted by thedeatons
Thanks Steve, VERY nice setup, however I don't want the full surround. EXTREMELY nicely done though!!!

I appreciate the pictures and quick response. Tonight the intake tract was on my mind and I wanted to get this settled once and for all.

James


Thanks bro...You think that nice you should see it now..I polished the airbox..:D

[thedeatons]

LOL...

Bikebandit.com has 1986 intake boot for $49!!! Yikes! Anyone have a line on cheap new ones?

WHY ISN'T THERE A SILICONE ALTERNATIVE YET!!! LOL

(We basically need a tapered silicone hose from 4" diameter to 1.5" diameter). Don't know the length that is available to make the taper)

[wes350x]

get one from ebay, lots cheaper and you may even find a good reed cage to go with it if needed.

[05LSR250R]

Originally posted by 312R1
Thanks bro...You think that nice you should see it now..I polished the airbox..:D
Does that air box have a drain? Have you ever had it hit the swingarm when bottoming? Any issues with it? Thinkin' about gettin' one!

[thedeatons]

Someone mentioned a used boot might not stretch over my 39mm carb properly.

[wes350x]

Originally posted by thedeatons
Someone mentioned a used boot might not stretch over my 39mm carb properly.



Just make sure its not dry rotted, you can check it out if the seller has good pics.

[mfr422]

I said the boot probably wouldn't fit, they get hard as they get older, we fought with one on my buddies 330. He had the same problem as danhung, carb angled into the frame we finally got it on there using a new boot and the boiling trick, btw his has a 38mm a/s. I had similar problems on my lrd chassis, the pro-x cyls have a different angle on the reed area and when coupled with spacer plates can make that area a mother. I ended up with the ebay intake, 40mm lectron, and the esr kit with a longer hose to go through the frame, my filter angles away from the subframe and is about 1/2" at it's closest point.
the ebay intake gives you a little better angle but has a crappy alignment with the reeds, I am currently making my own to hopefully correct the angle and alignment. Oh, btw I also run a reed spacer to get vacuum for my methanol fuel pump which makes the problem worse. We have tried just about every combo you can think of between our 3 bikes and it's always a tight fit.

[thedeatons]

Fellow DRR owner! We have a 50 for my 4 year old and a 70WC for my 6 year old. The 70 engine was sold, and I am currently installing a KX60 shifter in there....

Now I am hijacking my own thread... sigh.

[mfr422]

Ya, know what you mean, I have a lc 90 for my nephew, it's currently at the powdercoater, hs season is coming up soon. Back to business, there are a lot of good guys in here, I have had 5 R's over the years and own the two in my sig now. Lot's of good info, just ask away. I wish someone would come up with a silicone alternative, I'd buy one in a heartbeat.

[thedeatons]

I spent the last hour looking at 4" silicone funnels and 4" spun aluminum funnels, brainstorming away.

[mfr422]

When you find something, let us all know. I have a really hard time with that lrd frame fitment as it's a lot bigger for the shock and the side tubes are larger because of the aluminum.

[thedeatons]

What is the length of the stock boot? I know the small end would need to be 1.5", and the large end 4". I need to know the end to end length.

[mfr422]

I'm at work right now, I can get it for you in an hour or so, I'll post later.

[312R1]

Originally posted by 05LSR250R
Does that air box have a drain? Have you ever had it hit the swingarm when bottoming? Any issues with it? Thinkin' about gettin' one!


Yeah it has a drain..I run all last summer with it without any issues at all..it's a very nice box.

-Steve

[mfr422]

Deatons,
The stock boot is 8 1/4 inches front to back. Lonny

[thedeatons]

Thank you!

[dunatic]

Originally posted by thedeatons
So, for my question it looks like I need:

1986 boot from the carb to the airbox
My own plate with right side clearance for centermount pipe
My choice of TRX250R air filters

That should work with my 39mm PWk right? Think that is the best setup for dunes? I know the filter is fat enough, but am curious about the intake boot going to the carb. Restrictive?

This setup seems a lot better than a long skinny filter mounted on the carb with the oily filter hitting the frame and rear shock all the time.

Buy a brand new air box boot...soak it in boiling water (dont boil it in the water on the stove) til its VERY soft. stretch it over the carb and clamp it right away. let it sit for a day before you install it. that way it will take that shape and you can get it on and off at will from then on.

The air box tube will not restrict the air flow what so ever. In fact the velocity effect will increase the velocity going across the emulsion tube in the carb.

[dunatic]

Guys, Guys, Guys (and gals too).

You can run the air filter plate and a center mount pipe.

You have to clearance the plate for the exhaust and purchase either the ESR or ESR look a like resi holder.

When I last ran a 250r based type cylinder I remember buying the really early model cr250 rad valve. I believe it had a shorter neck and wasnt as angled as much. Here is my setup when I had my Polanda motor installed in my bike.

http://img.villagephotos.com/p/2006-6/1193082/DSC00440.JPG

http://img.villagephotos.com/p/2006-6/1193082/DSC00441-1.JPG

http://img.villagephotos.com/p/2006-6/1193082/DSC00449.JPG

[thedeatons]

Cool. Nice shots. I actually got some aluminum today and am having 3 made. They will be better than the Ebay ones, powdercoated black, and should have clearance like yours for the centermount pipe!

[danhung11]

To anybody running the Air Box Eliminator off eBay (performanceatv), what actually holds it in place besides the clamps on the rubber gromments?

Does it bolt to anything? The best picture I saw was wes350x. The ESR eliminator with a 89 CR250R air boot is still giving me a weird angle. It shoots the straight aluminum tube into the rear shock mount gusset on my Aren's frame. :mad:

[derby]

Originally posted by danhung11
To anybody running the Air Box Eliminator off eBay (performanceatv), what actually holds it in place besides the clamps on the rubber gromments?

That is the same kit you see above in dunatic's pictures. It looks like he just cut a rounded area so it would work with the centermount silencer.

[dunatic]

yep

the rubber grommets hold it in place and the rigidity of the air box boot clamped to the plate and carb secure it.

It doesnt move at all.

[danhung11]

Originally posted by dunatic
yep

the rubber grommets hold it in place and the rigidity of the air box boot clamped to the plate and carb secure it.

It doesnt move at all.

Steve,

Is it made from aluminum or plate? What did you use to cut it so nicely? The seller isn't much help on eBay.

Thanks in advance!

Dan

[dunatic]

its aluminum. I used a air scroll saw after i drew the circle in ink

[thedeatons]

Cool, but go hijack your own thread..... !!!! LOL


I just passed the halfway point on the mock up of my first (of three) of these plates. The plate is in place, just need to weld up the 4" tubing. FYI the rear brake reservoir is mounted on the right, outside, so I can clearance for a center mount exhaust. I will let you guys see the finished result.

[wes350x]

[QUOTE]Originally posted by thedeatons
[B]Cool, but go hijack your own thread..... !!!! LOL

YEA, HAD TO DELETE THAT LAST ONE

[thedeatons]

LOLOL...