What Did You Do With Your Commando Today?

robs ss said:

Ahh - I guess I'm (temporarily) lucky in that I have a pair of new RC's as spares, and my existing ones will do another 5000 miles. No holing problems yet, and I don't expect any.
Bugger!

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Café au Lait said:

One has a sizeable hole in it, you can see daylight through it plus some of the wire mesh is frayed and I wouldn’t want that sucked in.

Last night Matt messaged me to say he had the exact same issue and he too sanded down the sides. Apparently K&N are under new ownership and have obviously made changes to the product. The bigger problem for him was that the RC-1820, the chrome backed one you have have altered ID so that they no longer fit the carbs. He has resorted to buying the carbs directly from Keihin and having the inlets made for him to fit the filters.


“When I fitted the RU 1820, rubber backs, I also had to sand the inner part that is facing each other in order to make them fit. So same as you.

So part of the long story is that the company that used to supply my Keihins in the US closed their doors (all too many are doing this these days). So I am actually going directly to Japan to buy my Keihins now. That said, they don't supply the air filter mounts or carb spigots. So I am now having to make my own.

In order to deal with the K&N issue, I am making a left and right specific mount that is offset to the outside. While you may not have seen the ID size difference on the RU filters, its quite noticeable on the RC filters and that's why I also adjusted the OD on the filter mount to make it work. I also made them a bit narrower (closer to the carb) to gain a little more space behind the filter. Its tight back there and a lot going on so any extra space helps.”

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cliffa said:

Why not seal the holed areas with silicone, and then reverse the filters so’s the damaged areas are inside?

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concours said:

Some pre-season service. View attachment 124346

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