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Sportster Motorcycle Tires, Wheels, and Brakes Discuss issues with Sportster motorcycle tires, wheels and brakes.

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banjo, caliper, repair, russell, wildwood

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  #1  
Old 27th September 2019
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Maxeffort Maxeffort is offline
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Default Wildwood GP 310 Brake Caliper install with photos

I’ve intalled a Wildwood GP310 Front disc brake caliper on the 1996. The question was “does it fit with spoked wheels.” The answer is “yes.”



I picked up a used caliper, almost new actually, but the previous installer stripped out the banjo bolt threads.

To repair, I retapped the feed hole to 1/8” NPT and installed a Russell 1/8 NPT X #3 x 45* male fitting. Then ran a 38” Russell #3 stainless brake line and a Russell 7/16” x #3 straight banjo at the master.




As you can see, there is plenty of room between the caliper and the spokes. I had previously test fitted a Dyna caliper and it interfered with the spokes.








There is not much thread in the caliper to engage the mounting bolts. On the top bolt I was able to use a longer bolt and a self locking nut to “jam” and back it up.





On the bottom bolt, it’s very close to rotor, especially on this install because of the bobbin of the two piece Suncast rotor. With a one piece rotor, I might have sqeezed in a thin jam nut.

This is for my piece of mind, Wildwood doesn’t call for a jam nut



The performance is improving after two rounds of bleeding and a little bedding. The organic pads were fluid soaked, and I got more on them. I’ve only ridden it a few miles though.
I’ll ride it some more. If performance doesnt meet my expectations, I’ll install a set of EBC sintered pads.

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Last edited by Maxeffort; 27th September 2019 at 23:25..
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  #2  
Old 28th September 2019
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Nicely done, thank you for sharing.
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  #3  
Old 30th September 2019
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A quick update, the performance is noticeably better after the pads have bedded in.
The Wildwood four piston caliper with organic pads is a definite improvement over the the stock single piston caliper with EBC sintered pads.
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  #4  
Old 30th September 2019
John Harper John Harper is offline
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I've been looking at that Wilwood caliper for a while now, just haven't pulled the trigger.

John
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Old 1st October 2019
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Quote:
Originally Posted by John Harper View Post
I've been looking at that Wilwood caliper for a while now, just haven't pulled the trigger.

John
FWIW, The best price I saw new is on the black or red caliper
120-7737-BK or 120-7737-RD for $214. At Summit Racing
https://www.summitracing.com/search/...rd=120-7737-bk

Currently with code FALL100 you get $20 off (and free shipping).

I saw that price earlier this summer, with similar sitewide discount, but then acquired the used Wildwood caliper.

Summit wants a lot more for the polished version. Jegs has the polished for around $221, but only $10 sitewide discount.


I would have just installed a used four piston Dyna caliper with a bracket I bought, but it rubbed on a wire spoked wheel.

Last edited by Maxeffort; 1st October 2019 at 02:03..
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  #6  
Old 1st March 2021
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Old thread, but do these use the stock pads, or do you need to buy a specific pad for this caliper?

Roscoe
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  #7  
Old 1st March 2021
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I believe they come "loaded" with pads. Getting close to finally pulling the trigger on one, after my 1250 upgrade.

John
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Old 2nd March 2021
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Go on the Wilwood site. They have several compositions for pads

I need to do that too....got confused last week
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Old 2nd March 2021
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Quote:
Originally Posted by Roscoe13 View Post
Old thread, but do these use the stock pads, or do you need to buy a specific pad for this caliper?

Roscoe
It has a pad specific to the caliper.
They come loaded with a set.
Replacement pads available from Wilwood and EBC
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Old 2nd March 2021
Roscoe13 Roscoe13 is offline
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Quote:
Originally Posted by Maxeffort View Post
It has a pad specific to the caliper.
They come loaded with a set.
Replacement pads available from Wilwood and EBC
Thanks. If they come with pads, I won't have to find the correct ones right away.

Roscoe
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