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(01-29-2018, 01:07 PM)VLJ_imp Wrote: popgun, I don't think the shorter inlet tracts and exhaust would account for the different feel of the motor, which the '17 certainly has, compared to the '14. Rev the throttle, and the '14 has the typical ziiiiing...ziiiiing...ziiiing zero-vibration feel of just about every I-4 Honda has ever made. Rev the '17's throttle and there is a distinctive, unevenly-spaced pulsing that you can feel throughout the bike. It's along the lines of an inline Triple or V4, with a similar sort of additional texture.
Although I don't know how they achieved it, this additional texture is exactly what Honda said they gave the '17 motor by changing the timing on the first two cylinders.
mickey, this video has been posted here before...
[url=https://www.youtube.com/watch?v=hNOCYoK-GDo&t=173s]https://www.youtube.com/watch?v=hNOCYoK-GDo&t=173s
...which shows the two models being fired up side by side, and you can clearly hear the different engine note of the '17 model. It's not as smooth as the previous-gen motor. I've seen a better video of this same presentation by Honda, in which they go into greater depth with the sound comparison, but I can't locate it at the moment.
That is interesting for sure. Kawasaki claims to have focused a lot of effort on creating a target sound (deeper/raspier?) for the Z900RS as well. I believe there's even a press release where they admitted it was the first time they had tuned an exhaust for sound. Some consider the modern inline-4 feel and soundtrack to be "boring" so I guess that's what Honda and Kawasaki are responding to.
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mickey, this review mentions the revised valve timing on the first two cylinders, as well as the '17's new combustion chamber and slightly thicker base of the cooling fins...
https://www.ridersdomain.com/magazine/mo...-cb1100rs/
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Isn't there a difference between the RS and the EX, though?
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air-engine- exhaust parts are the same....
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(01-29-2018, 02:02 PM)EmptySea_imp Wrote: Isn't there a difference between the RS and the EX, though?
Not in terms of the motors and exhaust systems, no.
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Are you sure? because the discussion comparing the exhaust tones, buzziness (which I don't experience on my 2013, btw), seems to call into question that there is a difference in the timing between the two US versions of the bike. One possible explanation could be that some folks have read about the RS and assumed that it was set up the same (regarding the engine) as the EX. I mean, I don't care that much since I'm not in the least bit interested in getting rid of my 2013 ABS, but it might be worth doing some research.
What cracks me up about all of this is that we should have the answer about he timing instantaneously...and yet no one seems to be able to find out the timing on each version of the bike so as to prove things one way or another. Shouldn't that information be in a manual someplace?
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(01-29-2018, 02:02 PM)EmptySea_imp Wrote: Isn't there a difference between the RS and the EX, though?
I think the subtle performance difference between the RS and the EX model are attributed to the RS' advantage in weight and effective gearing from running 17" wheels.
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VLJ, if you can find a Honda press release that indicates that the timing has been altered once again then I'll admit to being surprised. Otherwise this just looks like the case of someone who was confused or simply did not take the time to check their facts when they wrote that review. They refer back to some of the same things and illustrations as the very first reviews of the bike years ago.
As to the exhaust note goes, well that's not so hard to believe.
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(01-29-2018, 02:40 PM)EmptySea_imp Wrote: Are you sure? because the discussion comparing the exhaust tones, buzziness (which I don't experience on my 2013, btw), seems to call into question that there is a difference in the timing between the two US versions of the bike. One possible explanation could be that some folks have read about the RS and assumed that it was set up the same (regarding the engine) as the EX. I mean, I don't care that much since I'm not in the least bit interested in getting rid of my 2013 ABS, but it might be worth doing some research.
What cracks me up about all of this is that we should have the answer about he timing instantaneously...and yet no one seems to be able to find out the timing on each version of the bike so as to prove things one way or another. Shouldn't that information be in a manual someplace?
All of the reviews I've read mention the change in valve timing and exhaust tuning as applicable to both the EX and RS for 2017. In regards to your question, this would imply that '13 and '14 models indeed have different timing than the '17 EX here in the States.
Obviously, this proves nothing... just reiterating what the inter-webs is suggesting.
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(01-29-2018, 02:40 PM)EmptySea_imp Wrote: Are you sure? because the discussion comparing the exhaust tones, buzziness (which I don't experience on my 2013, btw), seems to call into question that there is a difference in the timing between the two US versions of the bike. One possible explanation could be that some folks have read about the RS and assumed that it was set up the same (regarding the engine) as the EX. I mean, I don't care that much since I'm not in the least bit interested in getting rid of my 2013 ABS, but it might be worth doing some research.
What cracks me up about all of this is that we should have the answer about he timing instantaneously...and yet no one seems to be able to find out the timing on each version of the bike so as to prove things one way or another. Shouldn't that information be in a manual someplace?
Cams are the same, valves are the same, displacement is the same- because all the parts are the same. I compared the parts breakdown a year ago.
Even the intake velocity stacks and the throttle bodies are the same.
There is no difference to the engine whatsoever.
The only ‘inlet’ difference is the outer horn that attaches to the air box. (Same part that gets removed for the tsr flange)
So that, different mufflers, and *maybe* different ecu tuning is all there is.
Seeing how ign timing is tied to cam timing it won’t change the sound of the engine’s character.
Hell of a placebo effect eh?
Some of the posts on here regarding the ‘17 are interesting.....
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