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+--- Thread: Weird Suspension Design (/showthread.php?tid=5670)
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RE: Weird Suspension Design - flynrider - 01-08-2016
(01-08-2016, 07:28 AM)Rboe_imp Wrote: I think this topic came up in a book on Guzzi's. It's a rather trick way to have a sophisticated suspension with one leg responsible for one behavior, the other leg for a different one.
Apparently, being off center and asymmetrical does not bother the front one wit as the triple tree and axle join the assembly as one and it acts that way. The need to have the fork be mirror matches for each other is just a bias we have in our heads.
It came up in the Guzzi book where one grade of oil was used in one fork, a different grade in the other.
These motorcycle people can be quite clever at times.
Sometimes, too clever by half, but that's another topic.
Interesting. Before this, the only asymmetric forks I'd seen were the 80s Hondas with TRAC anti-dive that Joe mentioned above. Common sense would tell you that symmetry is a good thing in two parallel forks attached to the same axle, but I guess sometimes common sense is wrong
RE: Weird Suspension Design - rboe - 01-08-2016
I learned in my upper division classes; common sense will be your undoing. Dang.
RE: Weird Suspension Design - TINK_imp - 01-08-2016
"Economics" is the reason for the different spring lengths in the Deluxe/EX forks...
You will find that the Standard CB1100 uses the same length springs and spacers in both fork legs.
When Honda added weight to the Deluxe/EX design the cheapest way to compensate for the added weight was to beef up one of the two fork springs.
Hench the different length spring has very little to do with engineering.
RE: Weird Suspension Design - 736cc_imp - 01-08-2016
Buell racing was one of the first to have different internals inside each the fork legs for compression and rebound functions.
RE: Weird Suspension Design - Rocky_imp - 01-08-2016
(01-08-2016, 09:43 PM)TINK_imp Wrote: "Economics" is the reason for the different spring lengths in the Deluxe/EX forks...
You will find that the Standard CB1100 uses the same length springs and spacers in both fork legs.
When Honda added weight to the Deluxe/EX design the cheapest way to compensate for the added weight was to beef up one of the two fork springs.
Hench the different length spring has very little to do with engineering.
After reading this thread I went to my 13/14 Honda service manual and I found the same info; standard has identical length springs while the deluxe has the different length springs.
I had no idea than any manufacturer was doing this. You learn something new every day
RE: Weird Suspension Design - 4 Paws_imp - 01-09-2016
I've learned to trust and appreciate Honda engineering. We have both the Honda Jet R&D and mfg facility here as well as the jet engine facility.
They know engineering. And accountants are not in control.
With my Ural a "one off" is a common occurrence, they just use whatever part is handy at the time.
RE: Weird Suspension Design - Motogeezer1949_imp - 01-09-2016
(01-08-2016, 12:37 PM)Flynrider_imp Wrote:(01-08-2016, 07:28 AM)Rboe_imp Wrote: I think this topic came up in a book on Guzzi's. It's a rather trick way to have a sophisticated suspension with one leg responsible for one behavior, the other leg for a different one.
Apparently, being off center and asymmetrical does not bother the front one wit as the triple tree and axle join the assembly as one and it acts that way. The need to have the fork be mirror matches for each other is just a bias we have in our heads.
It came up in the Guzzi book where one grade of oil was used in one fork, a different grade in the other.
These motorcycle people can be quite clever at times.
Sometimes, too clever by half, but that's another topic.
Interesting. Before this, the only asymmetric forks I'd seen were the 80s Hondas with TRAC anti-dive that Joe mentioned above. Common sense would tell you that symmetry is a good thing in two parallel forks attached to the same axle, but I guess sometimes common sense is wrong
Interesting. Before this, the only asymmetric forks I'd seen were the 80s Hondas with TRAC anti-dive that Joe mentioned above. Common sense would tell you that symmetry is a good thing in two parallel forks attached to the same axle, but I guess sometimes common sense is wrong
One might think it's common sense but more like common assumption imo
RE: Weird Suspension Design - Lord Popgun - 01-09-2016
To add to my post above, I went back and looked at the fiche for the DLX. Sure enough it lists different part numbers for the collars. I can't believe no one else looked and called me on this
RE: Weird Suspension Design - HBFL_imp - 01-10-2016
Read in a moto mag awhile back its related to the increased weight on the DLX. Let's all take a deep breath.