Author Topic: duel disks for the 550 (Read 2676 times)

sixthwisconsin · « **on:** April 11, 2014, 05:33:21 pm »

Added duel disks to my 550k0 over the last couple of days.

Thanks to Godffery for the disks, new caliper, phenolic pistons and hardware. This was a pretty easy conversion on the 550 as both fork lowers are set up to accept the caliper bracket. Just some customization of the speedo drive to fit through the disk. That was pretty easy as well. I messed around with the alignment and shimming of the new caliper to make it parallel to the rotor but have that dialed in now.
SlingShot provided the additional lower line, double banjo bolt and a new 14mm master cylinder. We'll see on the 14mm MC. Lots of travel to move all that juice but it does bite nice eventually. I really debated back and forth between 14mm & 16mm. Got to do some test riding and pad bedding in the morning.

Dr. Noisewater · « **Reply #1 on:** April 11, 2014, 07:30:38 pm »

Looks pretty sweet!

Nikon1975 · « **Reply #2 on:** April 11, 2014, 09:40:42 pm »

Sweet!! I have the same setup, with the original MC on my CB500. Are there any recommandation on what cylinder to use? It nites very low like this and is kind of spongy.

Thanks,

Davide

Garage_guy_chris · « **Reply #3 on:** April 11, 2014, 09:45:41 pm »

I have been thinking about doing this on my 450 that has a 500/550 front end id love to see some shots of the other side where you have added the caliper

sixthwisconsin · « **Reply #4 on:** April 12, 2014, 05:26:24 am »

Quote from: Nikon1975 on April 11, 2014, 09:40:42 pm

Are there any recommandation on what cylinder to use? It nites very low like this and is kind of spongy.

The MC I purchased from SlingShot is no longer on the site. Here is another one that was a but more expensive. BTW, I still have my first 35mm camera, a 1972 Nikon F.
http://slingshot-cycles.com/products-page/master-cylinders/nissin-matte-black-retro-racer/

Quote from: Garage_guy_chris on April 11, 2014, 09:45:41 pm

I have been thinking about doing this on my 450 that has a 500/550 front end id love to see some shots of the other side where you have added the caliper

I'll add some more pics later today.

Nikon1975 · « **Reply #5 on:** April 12, 2014, 05:30:55 am »

Nice ! The original is 14 or 12 mm? I saw even some models with 16mm cylinder.

Thanks,

Davide

sixthwisconsin · « **Reply #6 on:** April 12, 2014, 09:09:13 am »

More pics

Two washers each between the fork lower and the bracket for both top bolts to rotate the caliper clockwise. The pivot pin on the bottom stayed as is. The outside pad was dragging on the bottom from not being square to the disk before this. Everything is nice and square now with even pad wear. You can see some discoloration where it was dragging on the inside.

double banjo bolt

Speedo drive cut down to fit through the new disk. I cut tabs and bent them down around the flat sided hub.

Dave Voss · « **Reply #7 on:** April 12, 2014, 06:30:18 pm »

Looks great! I also bought a David Silver Spares new replacement master cylinder for use with the dual disc front brakes on my CB550, but opted for the classic style unit with the round fluid reservoir. I chose the 16mm bore size, which feels like the original master cylinder did with only one brake caliper. I also replaced the straight lever with an offset lever to move the pressure point a bit closer to the grip, which I like a lot.

calj737 · « **Reply #8 on:** April 13, 2014, 05:17:29 am »

Bike looks great.

I noticed in your pics that the right side rotor is mounted with straight hex 8.8 bolts. You might give some consider to 10.9 flange head bolts. They would be much stronger and would carry a better load in their "shear" rating.

Killer Canary · « **Reply #9 on:** April 13, 2014, 08:17:07 am »

Just how much would you guesstimate that stopping power has improved, speaking in percentages?
I noticed a subtle difference just by fitting steel lines to the standard set-up. This must be impressive.

SF · « **Reply #10 on:** April 13, 2014, 08:52:04 am »

Front end looks great, how does it compare to the single?

riverfever · « **Reply #11 on:** April 13, 2014, 09:07:39 am »

More pics of the bike? Looks great. What headlight bucket is that?

TwoTired · « **Reply #12 on:** April 13, 2014, 12:17:16 pm »

Any pictures of the actual duel?
Pistols, swords, rapiers, light sabers, or shrieking words?

calj737 · « **Reply #13 on:** April 13, 2014, 12:34:19 pm »

TT - they stopped before they started...

sixthwisconsin · « **Reply #14 on:** April 13, 2014, 01:10:15 pm »

Quote from: Killer Canary on April 13, 2014, 08:17:07 am

Just how much would you guesstimate that stopping power has improved, speaking in percentages?
I noticed a subtle difference just by fitting steel lines to the standard set-up. This must be impressive.

Quote from: SF on April 13, 2014, 08:52:04 am

Front end looks great, how does it compare to the single?

Wow, tough question to answer. If you look at what I had: rebuilt original master, ss braided lines, rebuilt caliper, started with EBC kevlar pads, needed more bite so switched to original Honda sintered. Now I have 14mm modern MC, same ss braided lines, Two rebuilt calipers, two drilled and ground rotors, phenolic pistons and back to EBC kevlar pads. Yesterday morning, I did some pad bedding and only used the front brake. I think I could have done "stoppies" had I applied more lever pressure! The original set up was not confidence building and the lever pressure was ridiculous.

Quote from: riverfever on April 13, 2014, 09:07:39 am

More pics of the bike? Looks great. What headlight bucket is that?

That is the stock bucket. It was hydro dipped like the side covers and the tank. My signature has a link to my PhotoBucket album. There are hundreds of images but I do need some new shots since I have made a few changes.

Quote from: TwoTired on April 13, 2014, 12:17:16 pm

Any pictures of the actual duel?

HA! Thats a good one... I am a black powder shooter so I might be able to come up with some pictures for you!

sixthwisconsin · « **Reply #15 on:** April 13, 2014, 05:44:35 pm »

Quote from: calj737 on April 13, 2014, 05:17:29 am

Bike looks great.

I noticed in your pics that the right side rotor is mounted with straight hex 8.8 bolts. You might give some consider to 10.9 flange head bolts. They would be much stronger and would carry a better load in their "shear" rating.

Good thought but there may be some clearance issues with flange head bolts. I will defer to Godffery on this one as this is his set up.

Tews19 · « **Reply #16 on:** April 13, 2014, 05:58:32 pm »

Great work Dave. Did you do the set up thinking the 70 degree weather prediction yesterday would have happened? I was bummed but got in 100 plus miles on Friday.

I noticed your spring on the caliber and the nut that goes on the outside of the fork is on the inside... Any reason why?

sixthwisconsin · « **Reply #17 on:** April 13, 2014, 06:17:42 pm »

Quote from: Tews19 on April 13, 2014, 05:58:32 pm

Great work Dave. Did you do the set up thinking the 70 degree weather prediction yesterday would have happened? I was bummed but got in 100 plus miles on Friday.

I noticed your spring on the caliber and the nut that goes on the outside of the fork is on the inside... Any reason why?

Nick,
How you doin my friend? Any plans on doing Slimey Crud? Let me know and maybe we can ride together. Yeah...70º, right! I did go out and do a test run early before the rain. Good for you for getting the mileage in on Friday. The adjustment bolt just needed to be screwed in more on the right side so I ran out of threads. The bolt is flush with the fork lower and that is not a problem but the locking nut needed to move to the inside. It performs the exact same function on the inside so I figured no problem.

Tews19 · « **Reply #18 on:** April 13, 2014, 06:23:59 pm »

I am not sure about the Slime crud this early. The past few years it falls on the weekend my boys have Freestyle and Greco state in the Dells. I did the end of year run last year. It was cold as hell on the way home. As for me I am good. The 550 engine is giving me fits. I have yet to take the cases apart. I'm more afraid to take them apart to be honest. Any updates on your 750 build? Btw the 550 looks sweet even though they are teaser shots for the newbies who haven't seen her fully.

Dave Voss · « **Reply #19 on:** April 13, 2014, 07:26:21 pm »

Quote from: calj737 on April 13, 2014, 05:17:29 am

I noticed in your pics that the right side rotor is mounted with straight hex 8.8 bolts. You might give some consider to 10.9 flange head bolts. They would be much stronger and would carry a better load in their "shear" rating.

Many of the flange head bolts are too tall to clear the speedometer drive, so normal hex head bolts need to be used instead, this was the case when I installed the second disc on my CB550.

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Author Topic: duel disks for the 550 (Read 2676 times)