k&n filter blanking caps?

[agentpineapple]

i have a k&n filter fitted to my bike without the 2 blanking caps that fit over the spongy thingy majigs. are these blanking caps important? it doesn't seem to be a problem with my bike, but a little while ago i sold a spare k&n filter to another forum member and he's asked me this question and i don't have an anwser for him.
have a happy new year ladies and gents,

[tony.mon]

Yes, they're important.
The caps isolate the air from the sponge filters from the airbox.
Without them, the airbox isn't a closed box with only air flowing in at the snorkel and out into the carbs.
It'll make it more difficult to get it fuelling correctly.

You might be able to chop the corresponding parts from an old standard air filter, shorten them a bit and silicon them into place in the airbox.
The K+N holds them down and seals them, so getting the height right is critical.
Too short and they'll leak, too tall and the K+N won't seal correctly in the groove in the airbox itself.

[agentpineapple]

Yes, they're important.
The caps isolate the air from the sponge filters from the airbox.
Without them, the airbox isn't a closed box with only air flowing in at the snorkel and out into the carbs.
It'll make it more difficult to get it fuelling correctly.

You might be able to chop the corresponding parts from an old standard air filter, shorten them a bit and silicon them into place in the airbox.
The K+N holds them down and seals them, so getting the height right is critical.
Too short and they'll leak, too tall and the K+N won't seal correctly in the groove in the airbox itself.

bugger, i will have to look into aq home made bodge job........cheers tony

[tony.mon]

If you can wait I'll have a look in the garage to see if I have a spare pair of rubbers.
I don't need mine now that I have gutted the airbox, and re routed the breathers.
I expect I've kept them; I don't throw much away....

Haven't time now, though, as I'm off to visit relatives, I can have a look on Friday this coming week.

[agentpineapple]

thanks tony, no rush tho mate, i've seen your man cave(oops almost typed man hole that would have sounded just wrong) and i understand the size of the job you will be under taking trying to find 2 little bits of rubber/plastic....