Question about PAIR mod - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 13 (permalink) Old 02-28-2011, 09:38 AM Thread Starter
otx
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Question about PAIR mod

Hi All,

When I got the gas tank and airbox off the bike, I found that there was that little clear/white plastic bottle in there . . . it is part of the PAIR system but nobody has even mentioned its removal as part of the process . . . Can/should I remove it?

Thanks.
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post #2 of 13 (permalink) Old 02-28-2011, 01:28 PM
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No, it's the crankcase vent catch tank.
Do not remove it.
It's there to hold the residual oil that's separated from the crankcase air/oil mist that churned up during operation.

Most of the mist from the tank is routed up into the airbox and down into the throttlebodies and burned (part of pollution control).
There's a hose with a plug and clamp on the left side, near the side stand (one of many hoses). This drains the tank.

Periodically, place a drain pan under the hose, loosen the clamp, then pull the plug and drain the catch tank.
If the engine is run at high RPMs often, the you may need to drain it more frequently.

Last edited by SubSailor; 06-03-2011 at 05:39 PM.
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post #3 of 13 (permalink) Old 02-28-2011, 01:37 PM Thread Starter
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Thank you Sub!

Now, taking a better look at the schematics I can see which of the two hoses I am to remove and I understand it now. Sorry, I was a little fuzzy before.

While on the topic, what did you use to plug the hole for the PAIR hose that was removed from the airbox?
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post #4 of 13 (permalink) Old 02-28-2011, 04:45 PM
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You can either cut the hose short and plug it with a small ball bearing or screw, or find a hose cap at a hardware store in the same size.
Hose caps example:
http://www.nutsandbolts.com/rubber-caps-c-30_121.html
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post #5 of 13 (permalink) Old 03-01-2011, 08:39 AM Thread Starter
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Quote:
Originally Posted by SubSailor View Post
You can either cut the hose short and plug it with a small ball bearing or screw, or find a hose cap at a hardware store in the same size.
Hose caps example:
http://www.nutsandbolts.com/rubber-caps-c-30_121.html
Thanks!! I'll see if Home Depot has the appropriate plug.
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post #6 of 13 (permalink) Old 06-03-2011, 08:13 AM
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I was wondering about that catch tank after I followed it to the front of the engine. Im gonna leave the pink hose for drainage. So that means just plugging the one next to the pink one, correct? If I leave the stock plates on there then I can just throw some plugs on the end of the tube? Brilliant. Anyone have any ideas on how to get a stubborn flapper valve pin out? I tried leaning it over but that didnt help.
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post #7 of 13 (permalink) Old 06-03-2011, 09:05 AM
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I used a shop vac
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post #8 of 13 (permalink) Old 06-03-2011, 10:12 AM
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I wish I had one...
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post #9 of 13 (permalink) Old 06-03-2011, 12:32 PM
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Quote:
Originally Posted by otx View Post
Thanks!! I'll see if Home Depot has the appropriate plug.
Sorry, didn't mean to confuse anyone with the hoses.
The PAIR hose connection on the airbox can be capped with a 5/8" (15mm) heater bypass cap.
I found them at Advance auto parts.
They are a Dorman Cooling Bypass Cap (2 per package), Dorman pn 02252.
It fits snugly over the airbox fitting, and for additional security, I used a small radiator hose clamp.


Last edited by SubSailor; 06-03-2011 at 06:14 PM.
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post #10 of 13 (permalink) Old 06-03-2011, 02:16 PM
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You are officially one of my heros...
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