Triumphrat

BlueTrophy · 04-02-2009, 05:58 PM

Is it possible to remove the back portion of the airbox to cut it(for easier access in the future) without unhooking the front and disturbing the carbs?
I have the tank and rear fairings off right now replacing vacuum and fuel lines and would like to check the filter but do not want to disturb the carbs.

gamsa · 04-02-2009, 07:10 PM

I don't think it's possible the first time without taking the carbs off, no.

Mark62 · 04-02-2009, 10:46 PM

I don't recall if the the carbs were disturbed, but the mod has been done, search the older threads. There are pictures and everything! But I do not remember the author.
I did take the airbox apart one mine once. The center lower screw was a MF'er. I don't recall if I used a very long screw driver or a phillips bit in a gear wrench...sorry.
Mark

oz. · 04-03-2009, 09:37 AM

Gamsa is right. You will have to take the carbs off if its the first time you are changing the filter element. I've done mine (one of the first mods I done on getting the bike) and its not really that hard.
After loosening the carbs, you dont have to fully take them off nor disconnect the throttle cables, you will be able to remove the complete air box once you loosen the clamps.
When you come to cutting it I recommend doing it at an angle of approximately 45 degrees in the middle where it would sit next to the frame.
Its well worth getting a K & N panel filter as these flow much better,sound better and will outlast the bike itself.
When putting back together,
1st put carbs back on bike,
2nd put the carb side of the air box back on,
3rd put the filter in, if using a K & N you will have to discard the plastic bit inside the air box,
4th put the outer box, in two halves, back on.
I have left the bottom middle screw off mine and put a thin smear of sealant in it place, This together with the hold of the other screws holds it in place and has never caused me any problems in the 3,000 miles I have done since first doing the mod.
Good luck and it really is not hard to do.
Safe riding all,
Oz.

Mike The Bike · 04-03-2009, 03:38 PM

Ive done a 900 and a 1200 follow OZ,s instructions. And yes leave the middle screw out.

Mike

BlueTrophy · 04-03-2009, 05:02 PM

Thanks for the responses. I was afraid of messing with the carbs because I was not wanting to have them re-synched(sp?). I may go ahead and pull it.
Any need to re-jet due to the K&N flowing so much better than stock??

gamsa · 04-04-2009, 02:19 PM

There's a really good jetting guide at http://www.thunderbike.co.nz/worksho...ex.htm#Q-6.1.2 it's almost obligatory reading for all mechanically inclined Trophy owners, I reckon.

Halofaller · 04-10-2009, 12:12 AM

You DO NOT have to take off the carbs to change the air cleaner. I just went through this.

There is an air box mod that takes about 20 minutes to do and works perfectly if you don't mind modding the air box. The mod will NOT change anything except the exterior of the airbox and then you can slip in and out the air filter anytime you want, even on the road.

1. You can reach the rear facing screws on the topside without modding the box. All it takes is patience.

2. The bottom screws are the ones you can't get to.

3. Get a half handled hacksaw or better yet, just the blade itself. You DO NOT want the kind with very fine teeth since you are cutting a plastic that will just load up the teeth and make this a very slow process.

4. Wrap one end of the blade with some cloth to protect your hands. You are only going to do this once so make life easy, just wrap some cloth around it, enough to hold onto.

5. Cut away the inside rear facing bottom side air box screws. DO NOT cut all of them away, just the ones you can't reach with the driver. The flexible nature of the hacksaw blade is just what allows you to do this. You are going to press the blade up against the lower part of the air box and firmly but carefully cut away the portion that sticks down below the flat portion of the bottom of the air box. If you just do this with a bit of care, they cut away smoothly and along with that plastic come the screws.

What you end up with is just the outer clamping screws. Remove them with a driver and then move the front portion of the air box slightly toward the carbs. The air cleaner can then slide out toward you.

With this arrangement, you can also loosen the air box to carb clamps and remove the front part of the air box altogether. This is a bit more involved since you'll also be removing the side parts of the air intakes.

If you use this mod, an air filter change takes about 5 minutes if you have the new filter ready. I replaced the stock filter with a K&N and it worked perfectly. I cleaned the stock filter so I can take it along as a spare on long trips just in case.

This mod can't be seen without really looking closely and if you used some patience, it is almost impossible to tell.

The air box seals very well and since it is so rigid, there are no air leaks with this mod. The most outward bottom screws and the top screws keep the air box sealed as tight as stock.

BlueTrophy · 04-10-2009, 04:44 PM

I did go ahead and pull the carbs at the insistence of my mechanic and he was correct. There was crap in the bottom of each bowl. Especially #3.
I then went ahead and cut the airbox in half. I had my band saw out for another reason and went ahead and used it to cut the rear section of the box in half. It had a very thin blade on it and made a perfect cut. I had considered cutting it as Hallofaller suggested before deciding to pull the carbs. So far I am glad I did.
My mechanic has a manometer to resync for me after I get it back together. Taking it to him anyway for a new front tire.
FWIW, I am replacing the stock air filter with a K&N. Just for grins I went to the local Autozone and they ordered one for me yesterday and it is there today. Cheaper than I had found it in other places.

Farrnorth1 · 07-06-2011, 06:49 PM

Great post - I was about to remove the carbs before i read this one - I managed to get all screws out except the lower middle - I ordered OE triumph filter with airbox so I cut away the old box with a large tin snips till all that was left was the lower middle screw with a little plastic around it which I cut with a hacksaw blade - I'll cut the new box in half for next time - took about an hour and fitting new filter should be a breeze when it arrives and didnt have to touch the carbs the old filter was very dirty and probably the reason for a flat spot - could be so much easier with a slide in filter!!!! BTW its a 900 Daytona!