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I have an electronic tach on my bike ('74 R90) that was made to use mechanical tach.

I've just kept the rectangular rubber "grommet" in place so far, but it's about had it. (The rubber piece on the timing chain cover, held in place by the front cover.)

Looking for a more elegant cover and have thought of making an aluminum cover for it.

I've actually made an aluminum plate for the outside but now looking to mount it in the hole.

Thought of cutting the outside part off the rubber piece and attaching the aluminum outside I made to the rubber "inside" of the original piece.

Anyone do anything similar?

Snowbum says there used to be a BMW part for this purpose but it's NLA.

I would try my idea but my original rubber piece is so old and brittle it won't hold up to being worked on.

Anyone with a decent rubber one to pass on for experimentation?

Check with Airhead Salvage...maybe buy a front cover from a /7...

Kurt in S.A.

That piece is available at the dealer.

Chuey

Chuey wrote:That piece is available at the dealer.

Chuey

I couldn't find it on RealOEM
http://www.realoem.com/bmw/showparts.do ... g=62&fg=05

I'll check with a dealer, I didn't see it anywhere online though.

Kurt, it's actually the timing case with the cutout, so I won't go that route and replace it.

It's really not an issue, just seeing if anyone had a more elegant idea for this.

pkboxer wrote:Kurt, it's actually the timing case with the cutout, so I won't go that route and replace it.

Oh, that thing comes out of the timing case cover...I guess that would make sense, wouldn't it?

Kurt in S.A.

I have a R65 timing case cover you could have for shipping.

The square rubber grommet can be purchased separate from a tach cable. You could seal the hole with black shoe goo or put a nice stainless nut and bolt in th hole.

Teo