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Ducati Monster Forum
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better brakes for a 620
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Topic: better brakes for a 620 (Read 12038 times)
DarkMonster620
According to some, a bottomless pit eating machine
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Re: better brakes for a 620
«
Reply #30 on:
January 21, 2016, 12:43:21 PM »
Quote from: Syscrush on January 21, 2016, 11:50:55 AM
I have some 320mm Brembo snowflake rotors on the way. Here's hoping that they fit!
as long as they're 6 hole . . .
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Carlos
I said I was smart, never that I had my shit together
Quote from: ducatiz on March 27, 2014, 07:34:34 AM
Ducati is the pretty girl that can't walk in heels without stumbling. I still love her.
"When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth."
Syscrush
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Re: better brakes for a 620
«
Reply #31 on:
January 21, 2016, 02:30:33 PM »
Quote from: DarkMonster620 on January 21, 2016, 12:43:21 PM
as long as they're 6 hole . . .
They arrived today. 6 hole as shown in the ad.
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DarkMonster620
According to some, a bottomless pit eating machine
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Re: better brakes for a 620
«
Reply #32 on:
January 21, 2016, 04:48:09 PM »
Quote from: Syscrush on January 21, 2016, 02:30:33 PM
They arrived today. 6 hole as shown in the ad.
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Carlos
I said I was smart, never that I had my shit together
Quote from: ducatiz on March 27, 2014, 07:34:34 AM
Ducati is the pretty girl that can't walk in heels without stumbling. I still love her.
"When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth."
Syscrush
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Posts: 240
Re: better brakes for a 620
«
Reply #33 on:
January 22, 2016, 10:18:34 AM »
The calipers I had for this were missing the pinch bolts, so I ordered replacements in stainless from Pro-Bolt. They arrived yesterday so I put the calipers back together, and all of a sudden the OEM mounting bolts look like utter garbage. And I expect that the caliper mounting bolts are going to be the same story.
They don't list the Monster 620 or the older superbikes on their website, but they do have this guide:
Pro-Bolt rotor bolt guide
.
The bike is in storage right now and I don't have ready access to it to pull parts and take measurements. From the photos of various Monster and Brembo snowflake bolts & rotors I've found online, it looks like the LSSDISCDUC10 would probably work. Any thoughts?
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BK_856er
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2007 M695; 2004 749s
Re: better brakes for a 620
«
Reply #34 on:
January 23, 2016, 01:45:05 PM »
Don't know exactly which bolts you're referring to, but watch the bolt grade and specs for critical applications. Some of the SS stuff out there is brittle and not well suited...
BK
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Syscrush
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Re: better brakes for a 620
«
Reply #35 on:
January 25, 2016, 05:59:06 AM »
Quote from: BK_856er on January 23, 2016, 01:45:05 PM
Don't know exactly which bolts you're referring to, but watch the bolt grade and specs for critical applications. Some of the SS stuff out there is brittle and not well suited...
This is solid advice. I expect high quality from Pro-Bolt, and what I'm looking at are bolts that are specified for the intended application.
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ducatiz
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Re: better brakes for a 620
«
Reply #36 on:
January 25, 2016, 06:13:44 AM »
Quote from: BK_856er on January 23, 2016, 01:45:05 PM
Don't know exactly which bolts you're referring to, but watch the bolt grade and specs for critical applications. Some of the SS stuff out there is brittle and not well suited...
BK
Do not use anything less than A4 stainless. Even that high grade stainless is insufficient to compare to 10.9
Most of the pinch bolts are 10.9 or 12.8 alloy.
if you use A2 stainless, give me an email so I can buy a life insurance policy on you.
http://www.anzor.com.au/tensile-strength-comparison-chart
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"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the air—these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.
Syscrush
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Re: better brakes for a 620
«
Reply #37 on:
January 25, 2016, 07:11:38 AM »
Quote from: ducatiz on January 25, 2016, 06:13:44 AM
Do not use anything less than A4 stainless. Even that high grade stainless is insufficient to compare to 10.9
All stainless fasteners from Pro-Bolt are 316, which is supposedly equivalent to A4, but it looks like there are multiple grades of 316 ands some of them are equivalent to A2. From the chart you provided, 316 is definitely lower tensile strength than 10.9 or 12.9 (700-800 MPa vs. 1034-1200 MPa).
I've been looking for stories/evidence of failure of Pro-Bolt stainless fasteners in brake applications and not found any, but I'm not crazy about the idea of reducing the safety margin when it comes to brake-related parts. Thanks for the pointer.
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Syscrush
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Re: better brakes for a 620
«
Reply #38 on:
January 25, 2016, 07:53:53 AM »
What's stressing me out about this, other than the money already spent on SS pinch bolts, is that Brembo won't sell replacement OEM pinch bolts (or anything else to service the calipers), Pro-Bolt sells SS pinch bolts specifically for this application but they're apparently far under spec, so the only option that's apparently safe is titanium, which is really pricey.
I made the purchase of the SS bolts on the strength of Pro-Bolt's reputation and this description on their website:
Quote
Stainless Steel Pinch Bolts for Brembo Calipers. These are the ones that go through the caliper itself pinching the two halves together (enough for rear caliper) The thread diameter is M8 with a 40mm length and has a 1.25 thread pitch and a low profile head. An identical replacement to the original only with great rust resistance! They fit most early Brembo calipers and can be torqued to manufacturers' original settings. Copper grease also supplied.
I've contacted their sales department for more info on specs etc.
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koko64
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Re: better brakes for a 620
«
Reply #39 on:
January 25, 2016, 10:24:08 AM »
I guess it depends on what grade stainless (and true quality of the stated material). I've also seen crappy Ti bolts from a dodgy source. At least Pro Bolt is a well established company that communicates with customers.
My dealer at least has new mounting bolts in stock. I noticed they went to silver zinc at some stage rather than the older style gold zinc. Fresh bolts really do tidy up the look.
«
Last Edit: January 25, 2016, 10:39:12 AM by koko64
»
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2015 Scrambler 800
DarkMonster620
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Re: better brakes for a 620
«
Reply #40 on:
January 25, 2016, 11:04:21 AM »
I got some screws at Mcaster Carr . . .Made in Germany 10.9
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Carlos
I said I was smart, never that I had my shit together
Quote from: ducatiz on March 27, 2014, 07:34:34 AM
Ducati is the pretty girl that can't walk in heels without stumbling. I still love her.
"When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth."
Syscrush
Full Member
Offline
Posts: 240
Re: better brakes for a 620
«
Reply #41 on:
January 25, 2016, 12:19:54 PM »
Quote from: DarkMonster620 on January 25, 2016, 11:04:21 AM
I got some screws at Mcaster Carr . . .Made in Germany 10.9
Thanks for the pointer.
Here's a 12.9 with "ultra corrosion resistant coating".
$4.40 per pack of 10
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DarkMonster620
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Re: better brakes for a 620
«
Reply #42 on:
January 25, 2016, 12:49:57 PM »
the ones I got have a hex head instead of either torx or allen
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Carlos
I said I was smart, never that I had my shit together
Quote from: ducatiz on March 27, 2014, 07:34:34 AM
Ducati is the pretty girl that can't walk in heels without stumbling. I still love her.
"When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth."
ducatiz
No trellis. no desmo. = Not Ducati.
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Re: better brakes for a 620
«
Reply #43 on:
January 25, 2016, 02:22:58 PM »
Quote from: Syscrush on January 25, 2016, 12:19:54 PM
Thanks for the pointer.
Here's a 12.9 with "ultra corrosion resistant coating".
$4.40 per pack of 10
That's a very good link. I wonder what the coating is.
There is a coating called Dacromet which is the gold standard for alloy metal coating on fasteners. I have a bunch of M8 and M6 in Dacromet and it's awesome.
Ducati has used yellow zinc 12.9 bolts on all their SBKs for years.
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Check out my oil filter forensics thread!
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"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the air—these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.
Speeddog
West Valley Flatlander
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Re: better brakes for a 620
«
Reply #44 on:
January 25, 2016, 03:41:39 PM »
OEM bolts are 10.9.
Not relevant for this application on a 620, but '01 and earlier with a mechanical speedo drive need low head bolts, at least on that side.
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