Triumphrat

dazco · 08-19-2005

Ok, so i removed it and *enjoyed* many obsticles along the way. Real fun. :-D Anyway, when i started it it was cutting out a lot more than normally on a cold strat. But i attributed that to gas tank removal. (i hope) After about a minute i could rev it w/o cutting out. Gave it a quick ride round the block and it seemed to run ok. might be my imagination but it may have run a little weaker.

but heres the question. A couple others have mentioned the need to cap 4 carb nipples. But all i had to remove from the AI were the 2 cylinder goodies and plug them of course, the big airbox hose, and one small vaccum line that has a sort of ringed plastic cover and went to the left carb intake manifold, which i then capped.

Whats the deal with FOUR caps that i have heard of? This is a CA model, so I assume the 3 are for the hoses for the CA evaporitive loss system. Is that right? Or are there indeed other places that need to be removed and capped? I would think not since there were no other hoses from the AI unit aside from the left manifold line the airbox and the 2 cylinder things. I'm mixed up here because i think some of what i've read may have been from those who removed the CA evap loss system too and therefore mention 4 caps. In the jenks instructions he says "if you are in CA there is additional anti smog gear that needs to go". I think this is where the mix up is. Or do i have to remove that when removing the AI? I'm confused here !

I didn't find anything that would fit the airbox so i had to fabricate something out of some rubber type foam i had. I'll replace that as soon as i can, but i need to know if i otherwise did this right. So let me summerize what i did...

removed cylinder things and replaced with nissan drain bolts using the original copper washers and anti-sieze on the threads

removed airbox hose and corked

removed vaccum like from left carb intake and capped

removed AI unit.

what if anything am i missing? :???:

rodburner · 08-19-2005

Sounds like you got it done ok.The 3 other caps would go to the other 3 hosed vacuum lines for the CA EPA gear.

dazco · 08-19-2005

Thanks. thats what i figured but i wanted to make sure with all the confusion from reading about this.

by the way, doing this made me think of something that i've never heard mentioned. If you no longer have air being pumped into the exaust, wouldn't this mean that there is going to be more air for the intake and therefore make the mix leaner? And if so, with the stock bike considered lean in the first place wouldn't it now be too lean? Maybe thats why jenks says to set the mix screws?

[ This message was edited by: dazco on 2005-08-19 21:48 ]

rodburner · 08-20-2005

I would guess the air drawn by the pump was a minimal amount.As for the air screws,I set mine to 3.25 turns and never touched them again.Another bit may be better,but it runs good,so won`t mess with it.

bsmith222 · 08-20-2005

Quote:

wouldn't this mean that there is going to be more air for the intake and therefore make the mix leaner?

No. Keep in mind that the AI introduces air AFTER combustion so the mixture (jetting) is not affected.

-brent

dazco · 08-20-2005

Quote:

No. Keep in mind that the AI introduces air AFTER combustion so the mixture (jetting) is not affected.

True, but i think you misunderstood what i meant. They say that if you alter the amount of air that enters the airbox it will throw your mix off. IE:snorkel removal and such. people have reported ill effects by doing things that change the amount of airflow. Of course i'm not talking about doing that when you get pipes and rejetting and all that. That of course is all good. But a stock bike thats had the snorkel removed or any other change to the airbox so that the flow is altered supposedly requires rejetting or the mix will change. leaner i suppose, right?

Anyway, the point i'm trying so hard to articulate is that with the AI no longer pulling some of the available air out of the box, the carbs should now be seeing that extra airflow thats no longer being used by the AI system. the result in this thoery (assuming it's correct, tho it may well not be, hence the question) would be that the airbox is now allowing more air to the carbs than it was when the AI was using part of it. I would assume triumph designed the airbox to allow ONLY a given amount of intake for the carbs to balance with the pipes, or so i ma told this is how it's supposed to work. So i nwould think they designed it to be able to intake an amount WITH consideration given to the fact that the AI will be sucking a certain amount. So now as i said, the AI is no longer using it's allotment and therefore the airbox is too open to keep the correct balance between intake and exaust.

Like i said, i may well be wrong or i wouldn't have had to ask. But i think you misread me, so what do you think now that i've hopefully cleared up any confusion? possible the AI removal CAN create an out of tune state? I'll tell you this, i just did a search for AI removal threads and what i saw scared me ! A number of people reprting problems after doing it. Mainly starting problems, but some saying the bike surges till it fully warms up after as many (in one case) as 30 minutes of riding ! So i'm a bit worried at the moment. I'll get a good airbox plug tomorrow since the one i have may not be good, then go for a ride and see how it goes. (and starts) but in any case it DID have a very bad start after i did the AI removal. FAR worse then ever. Blip the throttle and it would start to die. It's never done anything close to that. Once it warmed up a bit it was fine, and possibly it could have been from removing the tank and getting air in the gas line or something, or so i hope. I just hope this wasn't a mistake because i had to ruin one of the clamps on one of the tubes that goes in the cylinder. guess i could use a small hose clamp tho..

cafestyle · 08-20-2005

dazco......you are over-complicating it. Accept that the AI injects 02 after combustion, and has no effect on mixture - full stop!

no-logic · 08-20-2005

Quote:

On 2005-08-20 07:35, cafestyle wrote:
dazco......you are over-complicating it. Accept that the AI injects 02 after combustion, and has no effect on mixture - full stop!

Ditto....no affect on mixture. This same type of system was put on cars in the 70's and lots of people disconnected them with no ill affect on driveability. No jetting or mixture adjustments needed.

Clifford · 08-20-2005

Hi Daz,

The amount of air being siphoned off the airbox is miniscule, not enough to visibly effect the way the engine runs.

As for those rubber nubbies; one pair of them can conveniently be used to measure the vacuum from the intake of each cylinder. You can hook up a carb tuner and use it to balance your carbs, that is, if you happen to make any kind of mod that affects the balance.

dazco · 08-20-2005

Thanks. I just hope it starts better today when i go out. And yea clifford, i do wanna get a carb balancer. I had one of the mercury ones i bought back in the 70's and recently found it with the tubes all shattered in the back of a storage locker. kinda worries me where that mrecury is !