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Author Topic: Bar Inner Diameter  (Read 1741 times)

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DF

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Bar Inner Diameter
« on: February 08, 2007, 05:00:44 PM »
Hey - can anyone tell me off the top of their head what the inner diameter of my 1974 CB550 handle bars would be?

I am looking at some bar-end mirrors from http://www.trak-tek.com/products/front/barEndMirrors.html

They are available in 12mm to 22mm.

Pretty expensive, but I can't seem to find anything else I like.

Thanks!

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Shadowjack1020

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Re: Bar Inner Diameter
« Reply #1 on: February 09, 2007, 02:59:11 PM »
You probably know this, but bike bars are almost universally 7/8" OD. Harleys and cruiser-style bikes are 1", but there are ALWAYS exceptions. Having just measured the ID of a set of 7/8" CB750 bars, it's 21 mm inside.
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DF

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Re: Bar Inner Diameter
« Reply #2 on: February 10, 2007, 08:58:29 AM »
Right on - Thanks.
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Offline gerhed

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Re: Bar Inner Diameter
« Reply #3 on: February 10, 2007, 09:06:33 AM »
Depending on the pull back angle and length of your bars,
bar end mirrors might not work too good.
Difficult to get decent rear line of sight.
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Rides: 75 CB750F, 48 Indian Chief, 67 Triumph TR6, 63Honda CA95
          83 XL600R in CB360 Frame
          3-wheel electric tilting cycle

Peter

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Re: Bar Inner Diameter
« Reply #4 on: February 10, 2007, 01:21:30 PM »
According to my caliper, 11/16"
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Offline chung

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Re: Bar Inner Diameter
« Reply #5 on: February 10, 2007, 04:52:47 PM »
Round ones are hard to find. I found a similar set to those in the link, too small and way more $$$. The other factor is they are the first thing to hit the ground if the bike gets knocked over. I have literally replaced dozens.
Most catalogues have bar-ends for about $20-$30 but they are somewhat rectangular and not real stylish.
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Member#2815
1971/76 CB750 Hack @970cc,
1975 CG750K
1970 CB350,
1972 YDS7, 250
1972 YR5, 350
1977 RD400,
1978 Piaggio Grande/Batavas HS50 Special
1981 XS650 Special II

Cattledog

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Re: Bar Inner Diameter
« Reply #6 on: February 28, 2007, 10:24:16 AM »
did you order from Trak-Tek?

If yes, did the mirrors arrive yet?
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Offline SD750F

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Re: Bar Inner Diameter
« Reply #7 on: February 28, 2007, 12:12:33 PM »
Just thought you should know, 11/16" = 17.5mm...

MODIFIED NUMBERS... CALCULATOR ERROR ;)

And a ID of 21mm = .826" or a wall thickness of only .024"!!!  So I think it would be safe to say there is some variance from one 7/8 standard handle bar to another as well as factoring in manufacturing technique and whether or not the tube was "pulled and formed" near the bar ends...

Something to consider.

Scott
« Last Edit: February 28, 2007, 02:30:04 PM by SD750F »
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Cattledog

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Re: Bar Inner Diameter
« Reply #8 on: February 28, 2007, 01:23:19 PM »
just check my id and it is 0.706 or 18mm.....
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