 Air filter mod question, need second opinion.
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Joined: Mar 2009
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Complete Newb
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Complete Newb
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I recently removed the airbox and put in new XS air filters. From what I've read on this forum I needed to rejet, so I took the bike to a shop (not a triumph dealer) because I didn't want to eff up the carbs by not doing it right. When I got the bike back I immediately noticed that my bike was running like crap, ( not accelerating properly or sluggish,engine sounding like it was missing here or there, strange popping sound). When I asked the mechanic about it he told me,"Oh that's normal when you are dealing with an open air system." But for some reason I don't believe him and think he didn't do the rejet right. Has anybody else had this problem and what did you do to remedy? Thanks a lot. '04 America, triumph off road pipes. 
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Re: Air filter mod question, need second opinion.
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Joined: Sep 2007
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Learned Hand
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Learned Hand
Joined: Sep 2007
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He screwed up your jetting. These bikes run flawlessly when jetted correctly. Find out what jets he used and compare that to the jetting calculator and you will know if it's even close. Doesn't sound like it. 
Howbeit when He, the Spirit of truth, is come; He will guide you in all truth:
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Re: Air filter mod question, need second opinion.
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Joined: Mar 2009
Posts: 14
Complete Newb
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Complete Newb
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Hey thanks. Sorry for the newbie question, but where can I find the calculator?
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Re: Air filter mod question, need second opinion.
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Joined: Aug 2007
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Should be Riding
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Should be Riding
Joined: Aug 2007
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in the tech vault, you can find all the info you desire
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
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Re: Air filter mod question, need second opinion.
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Joined: Mar 2009
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Complete Newb
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Complete Newb
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Thanks for that, computa' says 154, he says 120. Dragonaut says no.
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Re: Air filter mod question, need second opinion.
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Joined: Aug 2007
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Should be Riding
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Should be Riding
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120 sounds way too small for airbox removed and off road pipes. What size pilots do you have, 42's would probably be needed too. Save your money and follow dinqua's directions, it's a complete walk through with pics here is the link http://www.dinqua.com/Triumph/carbs0.html
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
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Re: Air filter mod question, need second opinion.
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Joined: Jan 2005
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Learned Hand
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Learned Hand
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Dragonaut, I just posted a question today about the XS filters in another tread and if you have them on your bike it kind of answers the question about fitment. Do you have any pictures you can post of them on the bike? Quote:
he says 120
 that´s just to funny.. you should have at least 145-150 for main jets with that setup
Last edited by Gooseman; 04/18/2009 2:04 PM.
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Re: Air filter mod question, need second opinion.
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Complete Newb
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they fit pretty well but you will need to get wider compression bands, the ones they include are a little too thin and they will slip around and possibly tear the rubber when you tighten them to the carbs.
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Re: Air filter mod question, need second opinion.
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Joined: Jan 2005
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Learned Hand
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Learned Hand
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Thanks Sam, did you get the 54mm`s
Johann
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Re: Air filter mod question, need second opinion.
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Joined: Mar 2009
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Complete Newb
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I think so, I know I went with the 2 1/2" mounting, so whatever that is in metric.
Last edited by dragonaut; 04/18/2009 3:31 PM.
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Re: Air filter mod question, need second opinion.
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Joined: Feb 2007
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Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,220 Likes: 61 |
dragonaut , what pipes are you running? 120 is a stock jet that should already have been in there. If the calculator said 154 you probably need 150 to 155 depending on where you live. Might want to adjust the pilot screws too.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Air filter mod question, need second opinion.
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Joined: Aug 2007
Posts: 10,730 Likes: 5
Should be Riding
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Should be Riding
Joined: Aug 2007
Posts: 10,730 Likes: 5 |
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
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Re: Air filter mod question, need second opinion.
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Joined: Feb 2007
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Fe Butt
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Fe Butt
Joined: Feb 2007
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Ok I would think with TORs depending on what incarnation they are would probably be around 145 to 150 depending on where you live but this is just a guess and only a dyno will tell you for sure.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Air filter mod question, need second opinion.
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Joined: Aug 2007
Posts: 10,730 Likes: 5
Should be Riding
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Should be Riding
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that's what I'm thinking too, 120's are just starving that motor. the mechanic dicked him over for sure
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
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Re: Air filter mod question, need second opinion.
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Joined: Jan 2005
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Saddle Sore
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Saddle Sore
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Anyone who says "Oh that's normal" when it's obvious he screwed up loses all rights to the title "mechanic"...
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Re: Air filter mod question, need second opinion.
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Joined: Aug 2006
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Adjunct
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Adjunct
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2 1/2" = 63.5 mm. I think you bought too big of filters. The XS filters are nice. especially for the $$$. 54mm are needed.
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Re: Air filter mod question, need second opinion.
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Joined: Mar 2009
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Complete Newb
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Hey thanks everybody for all the help! I'm not sure if i got dicked by this "mechanic" or if the guy was just an idiot and didn't know what he was doing. but seriously saying, "oh thats normal" when my bike sounds like it's going to take a giant crap doesn't give me confidence in his ability to do any thing.
funny thing though, I followed dinqua's instructions and once I got the carbs apart I found out what most already know, that he put the exact same size jets on...120's really? Also I do remember saying," you know I do a lot of reading on this forum and the general consensus is that 150-155 mains will be good.
So as the ol' saying goes if you want something done right do it yourself. I've already ordered the new mains online and I should get them next week some time. on a side note does anyone know where I can find long front brake lines? I put 12" apes on and everything fit neatly except the brake line.
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Re: Air filter mod question, need second opinion.
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Joined: May 2006
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Loquacious
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Loquacious
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Quote:
anyone know where I can find long front brake lines?
Spiegler
They turn orders around and ship within a day or two.
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Re: Air filter mod question, need second opinion.
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Joined: Jul 2007
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Worn Saddle
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Worn Saddle
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Quote:
the guy was just an idiot and didn't know what he was doing.
Now you've got it.
Fidelis et Fortis
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Re: Air filter mod question, need second opinion.
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Joined: Jul 2008
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Learned Hand
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Learned Hand
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Speaking of air filter mods, I'm considering cutting out the bottom of my airbox. I'm running gutted stock pipes with 4" baffles at the inlets. Will a simple airbox mod like this be worthwhile? Also, I ride in all types of weather, including heavy rain. Will an open airbox create problems?
'08 America Blue/White; Custom Headlamps, Custom Lowers, Clearview 20", Bafflectomy
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Re: Air filter mod question, need second opinion.
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Complete Newb
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I've always heard that cutting a hole in the airbox is not the best idea, it'll get water in it, plus it probably won't make that big of a difference. And I'm pretty sure you'd need to rejet any way. All I did was bought a piece of aluminum from the hardware store, bolted the battery box to said aluminum and moved that to where the airbox was and secured the carbs to the frame.It wasn't too difficult I just needed to rejet and tune the carbs properly. which I'll do this week sometime.
Anywho I hope that was a decent answer for ya.
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Re: Air filter mod question, need second opinion.
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Joined: Jul 2008
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Learned Hand
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Learned Hand
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I don't understand exactly what you did. What's a XS filter?
'08 America Blue/White; Custom Headlamps, Custom Lowers, Clearview 20", Bafflectomy
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Re: Air filter mod question, need second opinion.
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Joined: Jan 2005
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Learned Hand
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Gooseman
Bonneville America 904 Black/Silver
Triumph Tiger 1050 Black
Ducati Multistrada 1200s
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Re: Air filter mod question, need second opinion.
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Joined: Aug 2006
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Adjunct
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Adjunct
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Quote:
I've always heard that cutting a hole in the airbox is not the best idea, it'll get water in it, plus it probably won't make that big of a difference. And I'm pretty sure you'd need to rejet any way. All I did was bought a piece of aluminum from the hardware store, bolted the battery box to said aluminum and moved that to where the airbox was and secured the carbs to the frame.It wasn't too difficult I just needed to rejet and tune the carbs properly. which I'll do this week sometime.
Anywho I hope that was a decent answer for ya.
Had my airbox bottom cut out for 2 years now. Never had a problem. I ride in almost all weather. Lots of monsoons last summer. Yes there is some improvement but not much.
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Re: Air filter mod question, need second opinion.
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Joined: Jul 2008
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Learned Hand
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Learned Hand
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Thanks for the link, Johann! Those flters sure are less expensive than the K&Ns. Quote:
Had my airbox bottom cut out for 2 years now. Never had a problem. I ride in almost all weather. Lots of monsoons last summer. Yes there is some improvement but not much.
Did you remove the internal snorkle also? I'm just wondering why the airbox wouldn't be nearly as good as pods, assuming the bottom is opened up and all the snorkles are removed.
'08 America Blue/White; Custom Headlamps, Custom Lowers, Clearview 20", Bafflectomy
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Re: Air filter mod question, need second opinion.
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Joined: Jan 2005
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Learned Hand
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Learned Hand
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Quote:
Had my airbox bottom cut out for 2 years now. Never had a problem. I ride in almost all weather. Lots of monsoons last summer. Yes there is some improvement but not much.
I have the same experience, 2 years with cut bottom and no problems.
Cutting the airbox bottom out will give you more air to the carbs, thats a fact.
I screwed up my UNI filter and had to replace it with a new filter.
Did put the new filter in without opening the filter bottom up and noticed the bike starving for air.... cut the bottom out and the bike is breathing better again.
So it will give you more air, balancing that with the correct jetting will get you a better performance of the bike.
I don´t think you gain a lot of HP by this mood alone but enough to make it wortwhile..and it is totaly reversible at the cost of a new air filter.
Gooseman
Bonneville America 904 Black/Silver
Triumph Tiger 1050 Black
Ducati Multistrada 1200s
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Re: Air filter mod question, need second opinion.
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Joined: Jan 2005
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Saddle Sore
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Saddle Sore
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This was an early mod, and in my opinion, not really worth it. I used a hole saw and cut a 1 1/4" hole in the airbox and in the filter. A K&N to be accurate. I ride in the rain now and then and I also ride to work every chance I get, and there is a lot of dirt/dust where I work. Initially I noticed a slight improvement, but the increased gunk on the filter negated that in a short time. I plugged the hole with a 1 1/4" button plug and lived happily ever after.
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Re: Air filter mod question, need second opinion.
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Adjunct
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I live on a dirt road and have never had that issue of it gunking up. But i also added a piece of air filter material covering the hole. When i clean the K&N i also clean the other material.
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Re: Air filter mod question, need second opinion.
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Joined: Jan 2005
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Saddle Sore
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Saddle Sore
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I have since gone back to the stock filter. Cleaning and drying and re-oiling the K&N just isn't worth the time involved - for me anyway. Like I said, there's a lot of dust and dirt where I work. I clean the stock filter with my air compressor every oil change and replace it every 2nd oil change. It gives me a reason to spend a few $$$ at my dealer, and that's a good thing.
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