You are a cunning linguist.soluble comes from origins of 'solve' [a puzzle, break it up etc]
(english 'u' a later inclusion than original letter 'v' - and double uu or w)
so soluble means able to be solved, or dissolved, for things
[eg sugar in water]..
in- here the latin origin prefix meaning 'un-' as in not..
not soluble or insoluble.. not solvable or doesnt dissolve..
depends on origins of particular words, prefixes etc
esp latin, old english, french, germanic etc
and the various offshoots of them all,
plus pronunciations favouring this or that
ive had to 'translate' [based on being australian]
between broad scots, southern usa, liverpudlian [uk etc]
servicemen on leave who couldnt understand
each others 'english'...
curious what folk see as 'normal' [or not]
in that same situation an islander in our navy
was about to literally kill a usa serviceman
who greeted him with a friendly "hey mutherfukker!"
one black usa bloke thinking he was being friendly
to another black bloke whose idea of ....ing his mother
was the height of deep personal insult..
our island guy would have bitten his throat out
[literally] if we hadnt restrained him and explain
that the nice yank bloke was sending a friendly
greeting for his mother.. big island smile..
everyone mates again..
I just cut about 15mm off the end of an old toothbrush, was a round Colgate one. Fitted in tight, put hose back on pair valve then secured with the little clamp.
I realize this is getting off topic and should be posted in a more appropriate area but the interest seems to be here at the moment.
Never mind. That wasa dumb question. I didn't realize before that the valve was the silver piece and the black piece was the servo. Went back and re-read it and went, "Doh!".This might be a stupid question, but couldn't you skip buying the block off plate and just put another vacuum cap on that end, too? Then you'd be able to remove the valve, still.
Since I have no intention of removing my stock muffler or CAT, I guess this is a moot thread for me to be reading, but I am facinated by this removal process.I'm just not sure there's any benefit in removing the valve to justify spending over $20 on a block off plate.
Not a stupid question at all. What you suggest would work fine. The only problem might be with a slip on vacuum cap is that they are not very heavy duty and they might not hold up to the heat from the cylinder head area very well.Never mind. That wasa dumb question. I didn't realize before that the valve was the silver piece and the black piece was the servo. Went back and re-read it and went, "Doh!".
So, you wouldn't be removing the valve but you could still cap off each end and remove the servo. I'm just not sure there's any benefit in removing the valve to justify spending over $20 on a block off plate.
Your description of the system is perfect that is exactly how it works. With fuel injection, catalytic converter, o2 sensor, temp sensor and ecu / ecm, the system only activates at the rpm ranges that coincide with the ranges that pollution testing devices use (surprise surprise).Until now I had never heard the term "pair valve".
Is this a system to inject air into the exhaust just downstream of the exhaust valve?
I knew of a system like I just described that was introduced to the BMW twins in 1980 ('81?) in an attempt to make the bikes appear to be cleaner burning to the exhaust sniffers.
Most folks just removed all of this unsightly and heavy plumbing and blocked off the source and the port near the exhaust. It had nothing to do with modified exhaust systems, and of course, back then, there were no catalytic converters.
But if my bike would benefit from the loss of these parts, I'll do it. I'll even pony up the $20 for the block-off plate, unless someone on the forum with a machine shop would like to turn them out for us at a better price.
I can see what youre saying about it throwing off the AFR readings, but Im curious how it stops the popping and why its recommended to remove it when installing an aftermarket exhaust/fuel controller if there are no performance gains. Not trying to be argumentative or anything like that. I am genuinely curious, is all.There is NO performance gain or loss if it left on or removed. The only real reason to remove it would be if you had a race only bike and dyno tested it on a regular basis because it would give an incorrect result because of extra air. That can fixed by just clamping the air line shut to the pair valve during a dyno test.