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Old 10-09-2013, 04:15 AM   #15001
MrPopples
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well ... depends on how much post you display per page :P

but still, 15000 post on the Big :)
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Old 10-09-2013, 12:09 PM   #15002
ianlee
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master cylinder ratios

Ladder this may interest you and hopefully a few others.

http://roadstarclinic.com/content/view/89/95/

Anyone know the bore of our caliper pistons? About 32mm I think?
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Old 10-09-2013, 04:33 PM   #15003
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Rob, that's well earned! Have fun with it! But please tell me when you come over here, I would like to meet you at Stefan's home ...
Now we got to discuss what's the reward for the one who wrote the 15001. post on the 1001. page.
And the credits for realizing it goes to: Mr. Popples!
After midnight's greetings from Germany, Bambi
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Old 10-09-2013, 05:34 PM   #15004
guzzirelic
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Quote:
Anyone know the bore of our caliper pistons? About 32mm I think?
Master cylinder- front and rear 14mm
Front caliper - 32mm
Rear caliper - 27mm

(just happened to have my shop manual open when I read your post)

Relic
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Old 10-09-2013, 06:10 PM   #15005
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Great find, Ian.

Thanks. I saved the file.
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Old 10-10-2013, 04:00 AM   #15006
ianlee
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Obviously the "ideal"ratio he gives is not correct for our calipers. Quite a few sources state around 13:1 to be best for our type calipers. With a stock 14mm mc our ratio is 10.45:1. A 1/2" (12.7mm) mc would give a ratio of 12.7:1. I wonder if this wouldn't improve our brakes? How would you guys describe the feel of the standard setup? Leaning more towards mushy or wooden?

Here's another simple article but with a link to a nice spreadsheet you can use for your own calculations.

http://www.customfighters.com/forums...ad.php?t=56704
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Old 10-10-2013, 04:16 AM   #15007
robmoto
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Ian with a steel brake line and sintered pads I am happy enough, I have tradesmans hands, but some computer knob jockey,s who don,t have the strength get the upgrade from HRT .
sorry ..
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Old 10-10-2013, 04:59 AM   #15008
ianlee
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I hear you. I'm used to old bikes so I'm pretty sure the brakes will be ok for me. When I got my bike I only rode it once before I stripped it and now I'm still sorting things out. I found I have a 12.7mm master cylinder so I've never experienced what they should feel like standard. How do the brakes compare to your 650 Rob?
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Old 10-10-2013, 08:04 AM   #15009
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[QUOTE=ianlee;22477108]I had all the nuts and bolts and brackets plated. That was surprisingly cheap and I was very happy with the way they came out. Made reassembly that much more satisfying.

[ IMG ]


That picture is front page material.

IanLee. I have a dr750 rack. IIRC there are two small cracks somewhere, it's been in the shed for years, so I'll have to have a look.

If you want, I'll find out the postage charge and if it's not too expensive, you cover the postage and you can have it.
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Old 10-10-2013, 08:11 AM   #15010
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Well the 650 may be a tad better it has a larger disc don,t know about calliper or master cylinder sizes though I use a steel line on it also but are running standard pads.
Big Bob on the other site sais he likes standard pads on his bikes , but his hands would be powerfull.
I don,t like over powerfull brakes in the dirt , when a roo or wallaby jump out in front of you and scare the crap out of yuh I would rather brake hard rather than loose the front altogether type of thing.
I do brake hard on the front when riding and don,t have a problem with the brakes myself on the bigs but say you were doing 120 or faster on the tar the brakes arn,t that crash hot in a emergency, could be better.
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Old 10-10-2013, 08:13 AM   #15011
ianlee
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Quote:
If you want, I'll find out the postage charge and if it's not too expensive, you cover the postage and you can have it
Wow thanks! That's awesome!

Ian

ianlee screwed with this post 10-10-2013 at 08:25 AM
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Old 10-10-2013, 08:19 AM   #15012
ianlee
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Thanks Rob. The DR650 has a 12.7mm MC and 27mm and 30mm pistons in the calipers.
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Old 10-10-2013, 08:40 AM   #15013
Resi
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Hey guys,

just wanted to keep you informed that I am working on a SR41A...



Powder coated frame, clutch and generator cover. Engine 2K-painted higloss black. S/s allen heads for covers, others new zinc plated.
This winter's evening work

Cheers,
Lars
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Old 10-10-2013, 08:44 AM   #15014
ianlee
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Nice! Take lots of pics!
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Old 10-10-2013, 08:51 AM   #15015
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Here are the pics of the rack.










You can see the cracks at the lower front mounting point. I don't know if the metal pieces on the inside of the mount are a standard fit or whether they are fitted to reinforce the weak bits. I imagine they could be fixed by some one who can weld aluminium.
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