01-04-2017, 02:18 PM
Hi Everyone,
I have been looking for a simple, upright, old-fashioned bike for a little while. I am familiar with the cb's and like them, so I was surprised to see the new Honda 1100 available.
But I'm disappointed in it because of vibration - or "Rumble."
I thought I would register and submit an idea to everyone about the cam timing - "asymmetric cam timing" business, if I have that complicated name correct.
I do not think the timing was done for a Rumble - why go through the trouble of manufacturing a balance shaft and then put vibration back in.
And to keep hearing that 1 and 2 are one set of timing and 3 and 4 are a different set, that just did not make sense.
BUT! someone here mentioned the manual is not correct, that the two outer are the same, and the two outer are the same!
THIS makes sense if you think about heat problems... The longer duration for the inner cylinders might reduce the dynamic compression ratio, causing them to run cooler.
Wouldn't this make more sense than "Rumble?"
Already there's a limiter, incredible sparkplug threads, and special cooling for plug region.
I would bet that the cam timing was needed to get the cylinders cool enough to meet reliability requirements...
Just a guess. Anyone have better experience with this question (cam timing, dynamic compression, and cylinder temperature)?
I have been looking for a simple, upright, old-fashioned bike for a little while. I am familiar with the cb's and like them, so I was surprised to see the new Honda 1100 available.
But I'm disappointed in it because of vibration - or "Rumble."
I thought I would register and submit an idea to everyone about the cam timing - "asymmetric cam timing" business, if I have that complicated name correct.
I do not think the timing was done for a Rumble - why go through the trouble of manufacturing a balance shaft and then put vibration back in.
And to keep hearing that 1 and 2 are one set of timing and 3 and 4 are a different set, that just did not make sense.
BUT! someone here mentioned the manual is not correct, that the two outer are the same, and the two outer are the same!
THIS makes sense if you think about heat problems... The longer duration for the inner cylinders might reduce the dynamic compression ratio, causing them to run cooler.
Wouldn't this make more sense than "Rumble?"
Already there's a limiter, incredible sparkplug threads, and special cooling for plug region.
I would bet that the cam timing was needed to get the cylinders cool enough to meet reliability requirements...
Just a guess. Anyone have better experience with this question (cam timing, dynamic compression, and cylinder temperature)?