Author Topic: swingarm savvy needed  (Read 729 times)

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scout4924

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swingarm savvy needed
« on: July 21, 2008, 07:41:12 PM »
I Have a 72 CB500 and read somewhere that a 750 swingarm is 2" longer than the 500 and will fit right on the stock 500 frame is this true? If so what year 750 will work. I was planning on adding up to 3" to the swingarm but if a 750 arm will give me 2" I'll make do. Thaks in advance for your thoughts.
« Last Edit: July 21, 2008, 07:44:34 PM by scout4924 »

Offline bwaller

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Re: swingarm savvy needed
« Reply #1 on: July 21, 2008, 08:35:03 PM »
Not sure about the 750F's but it's the other way around with the K's, the 500 arm is a little over an inch longer.

Offline GammaFlat

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Re: swingarm savvy needed
« Reply #2 on: July 21, 2008, 08:49:06 PM »
I just measured my '76 CB750K vs. my '77 CB750K.  The '76 is about 19 1/4" and the '77 is about 21" (I knew there was a difference in wheelbase, I just didn't know where it was).  I measured from the back end of the swing arm (not including the "axle locker") to the center of the swing arm bolt.  Not a terribly scientific measurement (angle of tape, obstructions, etc.) but pretty good for reference. 
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Offline bwaller

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Re: swingarm savvy needed
« Reply #3 on: July 21, 2008, 09:13:28 PM »
Well I'm sorry I thought all the K arms were the same, but only through 76 it appears. Using GammaFlat's measurement the 500/550's are 20.5"