Home Made Knob Solution
(big thanks to RocDoc and Robert Mayes)

You don't have to use a screwdriver or old washer to open your oil fill cap. Why buy aftermarket airfilter nuts when you can make your own. Want to guess what they're made of? (answer below)

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Answer

Answer

And the answer is______ Bathroom Faucet Knobs !!!

Basic "How-To":

Head to your local hardware store and pick a bathroom faucet handle you like. (Metal, not plastic). Carefully measure your oil filler cap, wrap the faucet handle with tape and transfer this measurement to the knob. Now cut the knob with a Dremel or other cutting wheel tool (the tape will keep the chrome from chipping). Came out a little crooked eh? not to worry. If you have a drill press or a friendly neighbor with one, pass a bolt (1/4") through the newly trimmed knob with the threads pointed upward. Cinch it down with a nut and put the bolt into the drill press. Now you can simply run the spinning knob down (carefully) onto a file and even things out. Don't let the knob get too hot or the chrome will peel off. If you don't have a drill press handy you can use sandpaper on a flat surface.

Done with that? Now you need to drill a hole in the motorcycles oil filler cap. "Be sure it's centered!!!!" Drill the hole just large enough for a 10-32 bolt (or metric equivalent). Now clean everything up and do a test fit. Bolt through the top of the cut down handle, through the hole you've drilled in the oil filler cap and put a nut on it. Good? If not and the handle is too large or crooked you can just cut it again. If you've really messed it up there's always the other handle. If the test fit looks good to you we just have to glue it all together. Use an Epoxy "Paste" not super glue or contact cement or anything else. The Paste is the stuff made when you mix the two tubes together. Put the paste on the two items you're gluing together (handle and cover), Put the bolt through, put some Lock Tite on the bolt end that's peeking through the bottom of the cap, and tighten it down securely. If there's any extra bolt just cut it off flush with the nut. Now stake the nut by using a center punch on the bolt. You don't want that sucker coming off and landing in your crankcase. The combination of LockTite and staking the nut will prevent this. Make sure you don't have any glue oozing out around the edges. Set the unit aside for the glue to cure.

For decoration you can use the faucet handle "H" and "C" that came with them, find some chrome caps with no printing or file a little off the edge of a nickle and put it in there. Fit perfectly with the handle I picked.

To do the aircleaner cover bolts it's almost exactly the same concept except you cut the lavatory cap much shorter, grind off about half the center stud inside the handle, put a suitable metric bolt through the center and screw em on! The look good and only cost you about five bucks for two knobs.

Cheers

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