Kind of urgent By gowron78 (Read 923 times)

[gowron78]

What is this attached to my muffler? And why would it not be on my new one? Everything else matches exactly except this..... Huh?

Every YY250T muffler I see online does not have this. No idea what to do now

Attachments:

[cruiser]

I believe you are looking at a P.A.I.R. valve. It is used to reduce emissions especially at idle speeds. Here's an explanation from a motorcycle site. They also show how to remove it, but they do not think it is worth the trouble.

.bugmanweb.com/gsxr/pair.html" rel="nofollow" target="_blank">.bugmanweb.com/gsxr/pair.html

Damin69 (Todd Fiebranz) has it on his scoot, but I do not.

[gowron78]

Ok so it's really not needed? There is no new muffler out there which has this valve

[alleyoop]

I believe they call that a PAIR system, (Pulse Air Injection Reaction), its supposed to help burn any unburnt fuel.
Alleyoop

[gowron78]

Can I install the new muffler for now then just weld this on later from the old one?

I'm assuming this is needed to pass CARB in Cali which is already has.

[cruiser]

Apr 24, 2012 21:09:31 GMT -6 gowron78 said:

Ok so it's really not needed? There is no new muffler out there which has this valve

It works only at idle and is inoperative at full throttle. Apparently it makes no difference to the operation of the scoot and is strictly to help emissions. So it looks like it is not needed for proper operation of the scoot.

[cruiser]

Apr 24, 2012 21:14:03 GMT -6 gowron78 said:

Can I install the new muffler for now then just weld this on later from the old one?

I'm assuming this is needed to pass CARB in Cali which is already has.

CARB qualification is determined at the manufacturers level. So the scoot already has been certified and should be identified by a ID plate somewhere on the scoot. It all depends on what California does for individual scoot safety inspections. I know that in Massachusetts, there is no checking out of the emissions devices especially since there is no CPU on the scoot. I would think that California is the same way?

[gowron78]

Any tips on getting this gasket out?

[fairweasel2323]

scooterdoc.proboards.com/index.cgi?board=250cc&action=display&thread=6123
P.A.I.R Explosion how to block off

[JR]

I've always said leave it alone and it causes no harm to the engine and/or perofrmance. After reading the link that Cruiser supplied it just confirmed what I have always said. I made a PDF to go to the the tech section from the link;

How the P.A.I.R works