PAIR system carbon buildup removal?

[Constant Mesh]

One might wonder if the the crossover connection between the 2nd & 3rd exhaust headers is plugged with crud too?

 

[2fjr]

I ended up cleaning the parts in some old carb cleaning solvent which did no harm to the rubber. I decided to block the system by tapping and inserting stainless set screws with thread locker. Then I'll just put the tops back on and call it a day. Not as clean as the block off plates, but it gets the job done.

 

[lnewlf]

pretty slick !

 

[08FJR4ME]

Either your not married or you have to much time on your hands.

Now that your done can you come do mine.

Very nice job by the way.

Dave

 

[2fjr]

Thanks Dave,

For the record, I am married. As far as time goes, hey, we are below zero for pretty much this entire week. Putzing in my heated shop fills the long long winter hours! The only reason did the plug routine was cause I happened to have a very long 1/4 x 20 tap to reach in there with.

I'm waiting for a package from Ron Ayers with a new CCT and some orings before I can button up. It looks like a real challenge to get the valve cover back in place without knocking off the gasket. If anybody has any tips for that part......please send em!!

Brian

 

[Queensland Ken]

I just applied some EFI friendly gasket goo to hold it all in.

The second time I also loosened off the throttle cables, made it real easy.

 

[HotRodZilla]

When I put my PAIR plates on, I remember the reed valve system reeked. I sealed it off and will never have to mess with it again.

 

[Fred W]

I just applied some EFI friendly gasket goo to hold it all in.
The second time I also loosened off the throttle cables, made it real easy.

+2 (+1, + 1)

Stick the valve cover gasket to the cover with any kind of O2 sensor safe sealant. If you let it set overnight it will definitely stay put when you go to install it. When installing the cover I do NOT put any sealant on the half moons at the ends of the cams as is called for in the FSM. That makes future removal of the cover a breeze, and I've never experienced even a weep of oil from the cover. Just be sure to look / feel that the half moons are in position before bolting down the cover.

Also, if you remove the throttle cables from the throttle tube and pull them through the frame to form a big loop over the engine it makes finagling the cover in place between the frame spars that much easier.

Those coolant o-rings can be bought at any good hardware store or Home Depot type place

 

[gixxerjasen]

Those coolant o-rings can be bought at any good hardware store or Home Depot type place

And...after you have taken the time to drive to Home Depot or the auto parts store and come back, you'll find the one you lost that caused you to make the trip in the first place.

 

[2fjr]

I had never heard of the sensor issue......good to know. I used some Permatex Ultra Black, primarily around the outer part of the valve cover gasket to stick em together. It has several days to cure while I wait for parts. I checked on the permatex web site and it says it is sensor safe.

 

[Jack G]

Just did mine at 75K. Two of them were completely clogged. I eliminated the PAIR system and put WynPro caps on. First, much less plumbing under the hood and second, the system was for all practical purposes not working anyways. Carb cleaner gets the metallic parts clean, WD on the reed valves and gaskets.

 

[Fred W]

Those coolant o-rings can be bought at any good hardware store or Home Depot type place

And...after you have taken the time to drive to Home Depot or the auto parts store and come back, you'll find the one you lost that caused you to make the trip in the first place.

Which wouldn't matter cause these are not re-useable. They get all squared off and hardened from the temps. You want new o-rings every time. DAMHIKT

 

[HaulinAshe]

It's not clogging of the PAIR system that's a real problem, it's when the carbon builds up on the reeds/seats and starts to bleed backwards. At that point it starts to screw-up throttle balance. A reliable TBS can become impossible, idle smoothness suffers...

Cap the evil PAIR system and never waste time cleaning them!

 

[Spud]

I just pulled my pair system and put wynpro plates on. FWIW my bike has 44.8K miles, and they did not look nearly that grungy. They were dirty, but no real buildup....I took no pics to compare

You hear about "blowing it out" when you run up the revs--I'm wondering if that's the diff? I have used the bike almost exclusively for traveling (not commuting or running around town) and it has spent a big part of those miles at pretty high speeds/rpms.