Topic: rocker ratio?

[bwaller]

Does anyone know the rocker arm ratio for the CB500/550/650's?

[bwaller]

I searched around and found a value of 1.1:1, but it isn't discussed much because we have no aftermarket options.
So if any clear-headed individual would verify my logic here's my plan.  I have my notes on valve lifts.

So if I spin a cam and indicate lobe height from base circle then divide into my valve lift, the result should be the arm ratio??

[FunJimmy]

So if I spin a cam and indicate lobe height from base circle then divide into my valve lift, the result should be the arm ratio??

Correct.

eg: if you measure 0.500" of valve lift and the lobe height (from base circle to highest point) of 0.300" then 0.500" divided by 0.300" = 1.666 rocker ratio.

The trick is......can you find different ratio rockers?

[bwaller]

So I average 1.08 on the intake side, a little less @ 1.07 exhaust. Has that 1.1 value just been rounded up?...don't know.

I only have 8 welded rockers to choose from Jimmy, maybe I should have gone through that exercise earlier in the process.