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Discussion Starter · #1 · (Edited)
Hi All,
Attention to those who may have purchased their new Street. I need to know the fork tube diameter, and frame front down tube diameter. Need to have information before June 4th. It's an easy measurement with any dial or digital caliper. Any and all assistance would be hugely appreciated.

Thank you in advance :)
Drew
 

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Discussion Starter · #5 · (Edited)
Please cancel this request. Just received a call that a nearby dealership got their 500's in yesterday for the H-D riders academy, so I am going there today to see the bikes first hand, and also take the measurements I needed. Thanks anyway. Drew
 
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Please cancel this request. Just received a call that a nearby dealership got their 500's in yesterday for the H-D riders academy, so I am going there today to see the bikes first hand, and also take the measurements I needed. Thanks anyway. Drew

Think they might let you sneak in a test ride also ? :)
 

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I'm curious what the fork tube diameter is if you wouldn't mind reporting back to us. Thanks.
 

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Discussion Starter · #8 ·
Fork tube diameter 37mm
Frame down tubes 1.250"
 

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yeah, and I thought the sportster forks were small at 39 mm.

hhmmm, might need to check into a fork brace.
You would think that using current production parts on new models would reduce cost, like the 39mm forks used on the Sporster for the Street models. 37mm... must be a weight saving measure?
 

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You would think that using current production parts on new models would reduce cost, like the 39mm forks used on the Sporster for the Street models. 37mm... must be a weight saving measure?
Well, maybe. But I think it was more of a penny saving measure. It's pretty obvious that HD has shaved every penny they can off the Street.
 

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I don't know about weight but swapping Forks with Sportster would give you better quality. Showa vs Endurance .
Eh, the level of quality you get from Showa, or Endurance for that matter, depends on how much the manufacturer is willing to pay Showa for their forks. Showa's low budget forks are about as bad as motorcycle forks get. Keep in mind that the crappiest, under sprung, under damped Japanese lightweight cruiser is probably using a Showa fork. Yeah, they can be that bad. A Sportster's suspension is pretty rough riding. A trip to Race Tech can cure that of course, but out of the box the forks on a Sportster are junk. Even the male slider fork used on V-Rods is a low rent piece with damping only in the left leg to save money, and this is on a premium motorcycle (same basic fork internals as the Valkyrie uses btw). That customer is usually illiterate about suspensions, doesn't understand how they work or what works well, and usually doesn't care. Putting premium suspension on such a bike is a waste of money. Harley offered adjustable forks and damping adjustable shocks on a couple of models in the 1990s (Sportster Sport and FXDX) and their customers didn't have the slightest idea what to do with the adjustments. More often than not they got them adjusted wrong and then complained to the dealer.
 

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KYB is nothing special either (I'm not a fan of their car shocks either, over damped and harsh). Some of the 39 mm forks Harley used came from KYB early on. They build what the manufacturer specifies and is willing to pay for. If the manufacturer wants to pay for premium quality components, KYB, Showa or anyone else can build it. If the OEM only wants low quality components then that is what they get. If the OEM doesn't have a budget for engineering and testing, then the resulting suspension settings, damping and spring rates, may be poorly chosen. Also keep in mind that bikes are set up for a notional "median" rider. If you weight more or less than this notional character, carry a passenger all the time or routinely carry a lot of cargo in saddlebags and/or a tank bag, then the stock suspension probably won't work well for you even with the most expensive and exotic suspension components.

Keep in mind the OEM works with the suspension supplier to get the spring and damping rates they want for their motorcycle, or car. It isn't a case of Harley going to Endurance, or Showa or KYB and saying I need forks or shocks for this or that bike. Harley or BMW or whomever spends time with the suspension supplier testing different suspension settings to get the components to perform to the bike manufacturers requirements. Now, how much money the manufacturer is willing to spend on testing and how much they are willing to spend on hardware qualtiy determines how well the production machine performs. I would be wary of a blanket assumption that just because Harley is using Endurance the suspension is necessarily bad. Maybe not. It depends on how much time and money Harley invested on engineering and testing and what quality materials Harley was willing to pay for.
 

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Never knew Showas were that bad. How they compare with KYB Shocks? Royal Enfield Continental GT with Paoli Shocks seem better equipped!
Again, it depends. The shocks Showa supplies for most sport bikes are high quality pieces even if their owners often don't realize this. Their Big Piston Fork is state of the art. Their best is as good as any company makes. But, they make budget components for customers who are not willing to pay for their best. Brembo is no different. They are a big industrial firm making brakes for everything from elevators to conveyor belts to helicopter rotor brakes (talk about a brake that takes severe abuse, a rotor brake on a naval helicopter gets hammered on every rotor shut down) to car and bike brakes. They also cast the aluminum sliders on my old K100 fork legs, though the rest of the fork came from Sachs.
 
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