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Sensei
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You will notice, the builder is having troubles with the "adjustments" on the brake linkage......
This is because the way it is set-up, the linkage gets looser when the swingarm rises, and tighter as it decends..... The further back the rear sets are, the more pronounced this situation becomes.... (Trust me, having the brake pedal move under your foot, and require differing amounts of foot motion to activate depending on how far the shocks are compressed (or not), rapidly becomes unnerving....)
Ideally, to minimize this effect, the pivot pin in the clevis at the "front" end of the linkage rod should be as close as possible to the swingarm pivot point OR (and/or) the brake arm positioned " back and inverted", so as the swingarm rises the brake arm travels in a slightly larger arc, compensating for this effect. On a stock bike, the "back and inverted" tactic is combined with a "front" pivot VERY near the swingarm pivot combining the "corrections"
In the next few days, I'll resume building my rear-sets for the 90 (with pix and diagrams) and better explain how to overcome this problem....
Steve
 

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Sensei
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Nope,......... No Aero-Eng. involved..... it's all about "simple machines"..... Needs More "think-it-through", less "jump-and-do"..... :idea:
 

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66Sprint said:
Nope,......... No Aero-Eng. involved..... it's all about "simple machines"..... Needs More "think-it-through", less "jump-and-do"..... :idea:
I notice the same thing when I take my wife for a ride on the back of the CL350. Immediately when she gets on the brake adjustment becomes to tight.
 

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Sensei
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Mike... Most older bikes have a small amount of "error" built in as they position the linkage front pivot NEAR, but not AT the swingarm pivot..... It IS possible to eliminate ALL "slop" when fabricating "sets", but entails more work/fabrication..... The "average" rider won't even notice a minor discrepancy, but those of us who have actually raced and/or ride modern bikes will... ;) Steve
 

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66Sprint said:
Mike... Most older bikes have a small amount of "error" built in as they position the linkage front pivot NEAR, but not AT the swingarm pivot..... It IS possible to eliminate ALL "slop" when fabricating "sets", but entails more work/fabrication..... The "average" rider won't even notice a minor discrepancy, but those of us who have actually raced and/or ride modern bikes will... ;) Steve

werd.

just convert to hydraulic disk rear.

solves everything.

Anyone opposed to cable setups for the rear to eliminate this slop?

anyone got some good pictures of a 'good' setup? i am putting together my CB500 this summer and need to make up some rear set stuff.
 

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Sensei
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Jason.... I'm working on a "schematic" drawing to illustrate the "correct" (negligable error) set-up..... I'll be posting it in My "How to: rearsets" topic.... Steve
 

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66Sprint said:
Jason.... I'm working on a "schematic" drawing to illustrate the "correct" (negligable error) set-up..... I'll be posting it in My "How to: rearsets" topic.... Steve

sweet. i am looking forward to taking a peek at it.
 

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