Author Topic: Lemans 1 ?'s brake caliper woes fixed fairing ? now  (Read 6915 times)

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Lemans 1 ?'s brake caliper woes fixed fairing ? now
« on: March 05, 2015, 06:29:05 PM »
were the mags on Lemans 1 and the SP/Convert etc painted?  if stripped of paint, could they be left bare instead of painted?
someone painted mine a grey color, I'm just thinking ahead since they roll fine in grey.




On brakes, I have a few busted off bleed nipples. first plan is trying a reverse or LEFT HANDED drill bit, thoughts?

a welder isn't handy and they broke off flush.
« Last Edit: March 08, 2015, 07:13:58 PM by fotoguzzi »
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Offline mtiberio

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Re: Guzzi mags and paint ?
« Reply #1 on: March 05, 2015, 06:42:25 PM »
I sandblasted a set of those and then rattle can'd them black. Looked great


Offline mtiberio

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Re: Guzzi mags and paint ?
« Reply #2 on: March 05, 2015, 06:53:14 PM »

Offline Dimples

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Re: Guzzi mags and paint ?
« Reply #3 on: March 05, 2015, 06:53:50 PM »
Bare alloy metal isn't a recommendable option. Strip the wheels and paint them in the original way. Which is somewhat complicated concerning the masking, but very doable.

A "few" sounds like two or three. Source replacements (new) with free nipples. Save yourself the disappointment-- the remnants are not very likely coming out in your garage-- in an acceptable way!

D
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Offline Dimples

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Re: Guzzi mags and paint ?
« Reply #4 on: March 05, 2015, 07:10:13 PM »
I've had cast alloy Guzzi wheels chemically dipped to remove all the old finish. Very effective!. That "confetti" photo is of their tank depicting the accumulated paint chips. I got the impression that shop photos were not cool-- hence the unfocused hip-shot.



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Re: Guzzi mags and paint ?
« Reply #5 on: March 05, 2015, 07:35:50 PM »
I blast the wheels, prime with an etching primer and paint with Wurth wheel paint.  The outer edge is polished not painted. 
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Offline radguzzi

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Re: Guzzi mags and paint ?
« Reply #6 on: March 05, 2015, 07:46:18 PM »
Hey Brad,
I did not congratulate you on the LeMans purchase in the other thread so Congrats.  Good find.


Yeah, as others have said, the wheels paint easily and I would not strip them to leave them bare, they will oxidize.

Repair the caliper bleeder nipples very easily, drill the buggers out to 6mm, tap for 7mm and install new nipples.  Done.  Almost that simple.  I did a repair write up and posted it on Guzzi Tech years ago.  Kiss the very bottom of the drilled hole just to have a clean port for bleeding.

You are going to want to rebuild the calipers anyway so, new Teflon coated pistons, seal kit etc...

Best,
Rob

« Last Edit: March 05, 2015, 07:47:13 PM by radguzzi »
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Offline mtiberio

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Re: Guzzi mags and paint ?
« Reply #7 on: March 05, 2015, 08:14:57 PM »
what is the metal erosion process, EDM? some machine shops can electronically erode the steel and leave the aluminum untouched...

Offline SED

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Re: Guzzi mags and paint ?
« Reply #8 on: March 05, 2015, 08:37:59 PM »

On brakes, I have a few busted off bleed nipples. first plan is trying a reverse or LEFT HANDED drill bit, thoughts?

I've had very good luck with the left handed drill bits and the bleeder nipple is easy to to drill strait because it already has a centered pilot hole. 

Heat the area around the nipple with a torch or heat gun to get some expansion, then drill.  It will probably come right out clean.

Shawn
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Re: Guzzi mags and paint ?
« Reply #9 on: March 05, 2015, 09:47:44 PM »
Blast the rims and clearcoat them either with a no-gloss paint or no-gloss powdercoat.  They'll look like freshly blasted, dry aluminum.

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Re: Guzzi mags and paint ?
« Reply #10 on: March 06, 2015, 12:25:52 AM »
Slightly off topic:

I'm cleaning some rusty Convert brake rotors, and I was wondering whether they would be better painted or powder-coated, and what color.

I'm lucky in having about a dozen coaters in the area who do engine and brake components.
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Re: Guzzi mags and paint ?
« Reply #11 on: March 06, 2015, 07:52:22 AM »
Great thread, I've had the same questions. I want to refinish my wheels, and was wondering what the best process would be. Thanks for posting pics, including the hip-shot  ;-T
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Offline blackcat

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Re: Guzzi mags and paint ?
« Reply #12 on: March 06, 2015, 12:55:02 PM »
I recently had mine powder coated along with the disc carriers.



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Re: Guzzi mags and paint ?
« Reply #13 on: March 06, 2015, 02:41:50 PM »
I just spray mine with a rattle can, high temperature black or silver.
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Offline Hahnda

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Re: Guzzi mags and paint ?
« Reply #14 on: March 06, 2015, 03:57:36 PM »
Broke off bleeder nipples- find a small torx bit in your tool chest. Find a drill bit in a size slightly smaller than the measured OD of the bit. Drill a hole in the bleeder. Tap in torx bit. Turn the bleeder out.
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Offline blackcat

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Re: Guzzi mags and paint ?
« Reply #15 on: March 06, 2015, 05:20:54 PM »
Broke off bleeder nipples- find a small torx bit in your tool chest. Find a drill bit in a size slightly smaller than the measured OD of the bit. Drill a hole in the bleeder. Tap in torx bit. Turn the bleeder out.

Wow, I have to give that a try. I have one of the old calipers on my CX with the double bleeders and of course I broke the second one off just recently. The first one I broke off a dozen years ago.
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Offline Hahnda

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Re: Guzzi mags and paint ?
« Reply #16 on: March 06, 2015, 06:58:33 PM »
Oh, and use some heat. Small torch or heat gun.
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Offline SED

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Re: Guzzi mags and paint ?
« Reply #17 on: March 07, 2015, 12:53:48 AM »
I recently had mine powder coated along with the disc carriers.



Blackcat - those look great!  Mine are at the powder coater now.  What color did you use?
Thanks,
Shawn
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Offline 1oldcarguy

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Re: Guzzi mags and paint ?
« Reply #18 on: March 07, 2015, 08:55:38 AM »
Brad
If you want to try a bead blaster, I have one big enough, in my heated garage, in Bloomington
PM me if interested
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Re: Guzzi mags and paint ?
« Reply #19 on: March 07, 2015, 09:17:15 AM »
I media blasted the wheels on my V50 and used VHT (SP181 Aluminum) rattle can wheel paint with good success. Fork lowers also got the same treatment but a different color.
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Offline blackcat

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Re: Guzzi mags and paint ?
« Reply #20 on: March 07, 2015, 09:20:00 AM »
Blackcat - those look great!  Mine are at the powder coater now.  What color did you use?
Thanks,
Shawn

I honestly don't remember what color but it wouldn't be the right one for a concourse restoration as it has some metal flakes in the mix.
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Re: Guzzi mags and paint ?
« Reply #21 on: March 07, 2015, 09:34:16 AM »
Brad
If you want to try a bead blaster, I have one big enough, in my heated garage, in Bloomington
PM me if interested
Rich
Excellent! not quite there yet but when I order new tires I'll get back to you..
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Offline steven c

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Re: Guzzi mags and paint ?
« Reply #22 on: March 07, 2015, 09:38:17 AM »
 I used Eastwood Alum-a-blast on my rear wheel, seems to holding up fine and looks pretty good.
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Re: Guzzi mags and paint ?
« Reply #23 on: March 07, 2015, 11:54:33 AM »
Broke off bleeder nipples- find a small torx bit in your tool chest. Find a drill bit in a size slightly smaller than the measured OD of the bit. Drill a hole in the bleeder. Tap in torx bit. Turn the bleeder out.
sounded like the best idea... but... I got  the torx in nice and deep but when I went to turn it, SNAP! so now my worst fear is for real..
I need a replacement just the inside half of the left front caliper, anyone?
the other caliper is fine tho I have not freed the pucks yet.
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Offline Hahnda

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Re: Guzzi mags and paint ?
« Reply #24 on: March 07, 2015, 12:05:37 PM »
You broke the torx bit? Was it a really small one? I have had them strip out of the drilled hole but never break. If it strips out I just drill a larger hole and use the next size up torx bit.

Is it broke off flush? I have welded a washer to broken off bolts that are flush and then welded on a nut. The heat from the welding is usually what really helps to break it free. Willing to give it a try if you want to send it.
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Re: Guzzi mags and paint ? now brake caliper woes..
« Reply #25 on: March 07, 2015, 09:48:32 PM »
All this conversation about broken bleeder screws prompted me to look at the calipers in the junk box I brought back from Daytona 6 years ago.

Sure enough, one of the six screws was broken off.  Three of the remaining screws came out clean with a little patience and persuasion.  Another one came out after an hour of penetrating oil and rocking back-and-forth, although it appears about half of the caliper threads came out with it.  The last one is soaking in oil and it isn't looking good, as far coming out in one piece.

As an aside, one of the calipers was so rusty the pin spring was in 2 pieces and each pad came out in 2 pieces.  One of the pins was half the diameter it should be between the pads.  Getting the pistons out will surely be challenging.
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Re: Guzzi mags and paint ?
« Reply #26 on: March 07, 2015, 09:52:35 PM »
sounded like the best idea... but... I got  the torx in nice and deep but when I went to turn it, SNAP! so now my worst fear is for real..
I need a replacement just the inside half of the left front caliper, anyone?
the other caliper is fine tho I have not freed the pucks yet.

I have a few caliper halves in my stash. Can check to see if I have what you need tomorrow.
Charlie
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Re: Guzzi mags and paint ? now brake caliper woes..
« Reply #27 on: March 07, 2015, 09:57:13 PM »
I went years with broken bleeders.  I bled from the feed banjo when I needed to and considered it a minor inconvenience.  They have banjo nuts now with bleeders in them too, if all you're trying for is bleeding.  If they need to be technically correct, then Charlie + a service kit is your best answer.  Or new they're not too expensive.  Check MG Cycle.

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Re: Guzzi mags and paint ? now brake caliper woes..
« Reply #28 on: March 07, 2015, 11:01:51 PM »
I went years with broken bleeders.  I bled from the feed banjo when I needed to and considered it a minor inconvenience.  They have banjo nuts now with bleeders in them too, if all you're trying for is bleeding.  If they need to be technically correct, then Charlie + a service kit is your best answer.  Or new they're not too expensive.  Check MG Cycle.

New F08 calipers are around $130 at MG Cycle, but the "problem" is they have one bleeder and perhaps fotoguzzi wants to keep his Le Mans "correct". <shrug>  :)
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Offline Chuck in Indiana

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Re: Guzzi mags and paint ? now brake caliper woes..
« Reply #29 on: March 08, 2015, 01:02:59 PM »
Brad, if you want to save your oem caliper, I can probably get that bleeder out for you.
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