PAIR removal question - Wrist Twisters
 
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post #1 of 7 Old 05-17-2006, 11:49 AM Thread Starter
 
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PAIR removal question

For those of you that did the PAIR removal mod on your 919 (or RC51), what did you use to cap the pair inlet holes and where did you get them from? I did it last year and used some plastic furniture sliders, but I do not like them. They are a pain in the a$$ to get on because they don't stretch and they keep cracking after repeated heating/cooling cycles. I am tired of removing my tank and I need something that is going to hold up for my long trip coming up. Any help is appreciated. Thanks.

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post #2 of 7 Old 05-17-2006, 01:43 PM
 
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I got some alum. plate, traced old covers, cut, drill for bolt holes & wa-lah... pair valve covers. Doesn't look the greatest, but who's gonna see 'em?

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post #3 of 7 Old 05-19-2006, 12:23 AM
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Quote:
Originally Posted by blackbetty
For those of you that did the PAIR removal mod on your 919 (or RC51), what did you use to cap the pair inlet holes and where did you get them from? I did it last year and used some plastic furniture sliders, but I do not like them. They are a pain in the a$$ to get on because they don't stretch and they keep cracking after repeated heating/cooling cycles. I am tired of removing my tank and I need something that is going to hold up for my long trip coming up. Any help is appreciated. Thanks.
Please explain what the advantage here would be? What exactly does the PAIR valve do? I thought I read somewhere is scavenges air to the exhaust when the engine is decelerating and throttle is snapped closed? More info please!

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tires.... it's what's for dinner!
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post #4 of 7 Old 05-19-2006, 06:09 AM
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Nail on the head cycho. The PAIR system is designed to burn off unburnt fuel in the exhaust by sending air into the exhaust. This can cause popping, or, in my case, flames. Removing it has no performance gain at all, you just lose a few ounces of emission controls. Oh, BTW, that's all it's there for, emissions. The greenies are at fault for this one.

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post #5 of 7 Old 05-19-2006, 07:06 AM Thread Starter
 
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nuff sed...

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post #6 of 7 Old 09-22-2006, 01:18 PM
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Is there a write-up for the PAIR removal anywhere? I searched but can't seem to find anything... I like shaving weight.

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post #7 of 7 Old 09-22-2006, 02:08 PM
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Originally Posted by tpirman View Post
Is there a write-up for the PAIR removal anywhere? I searched but can't seem to find anything... I like shaving weight.
I talked a little bit about it HERE. (11th post down)

It's fairly straight forward. Either cap the holes or make block-off plates. Your choice. If you make the block off plates for the 919 you can use the reed valve inserts as the seals.. you just have to remove the small screws for flat block-off plates to work. You will see when you get it off. It's nicer to use the block-off plates because it cleans up the top of your engine and allows easier access to the pesky spark plugs.

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tires.... it's what's for dinner!
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