Brake pad de laminated ?

[Srinath]

Perfect fit. SV1000 front pad into the grimeca caliper of an 01 mz skorpion.
The bolt hole had to be drilled out about 1/32 of an inch and there it goes.
Cool.
Srinath.

[cat]

Cool! Does it work? - I mean...go for a ride.

Did you have to grind the sides, the edge, for it to fit? Or only the holes? Is the pad are similar, or...? (I mean, maybe you got more pad contact area, better.)

We could add this to the parts/specification file.

[cat]

srinath ji, sacreligious thoughts?

Ha ha ... you're making me think sacreligious thoughts ... see the 98 and later katana 600 and 750 had the same 41mm forks and spacing within 1/8th of an inch. I have thought long and hard about tossing the MZ forks and dropping the whole fork legs, calipers, brake discs - yes plural - have twin discs and wheel and fender into the triples of the mz. Katana forks also have rebound adjustment. And to cap it off the katana rear wheel is a 4.5" which looks like it would drop into the MZ swingarm with very little fuss.
What is preventing me ... the MZ I got has nothing wrong with its forks and I cant justify dropping 3-400 in the FE and rear wheel for no reason. More over, the 98+ katana has single action calipers. 89-96 katana has dual opposed pistons but its ~1/2 inch narrower c/c distance on the forks.
It would be a choice for me ...

nah, not worth the trouble and the expense, unless you got nothing else to do. Save the money - maybe you can retire one day. Dual discs unnecessarily heavy, anyway. More weight not good. Although...you wouldn't have use both discs. hmm....I would like to get rid of the Grimeca brake at the rear, though...I can't get disc bolts that work, they have to be button heads or they don't clear the caliper. I've had it apart for ages, but now i'm trying to get it together and that's still a hassle.

Meanwhile...I have to make yet another call to Yamaha dealer, endless hassle trying to get supermoto tubes. I'm beginning to think i should just order them online and bear the shipping cost.

[Srinath]

Cat - The brake does work, they have been ested on a 50 mile ride. I spec-ed em online with dimensions and compared it to stuff I had lying about. This bike currently is "borrowed" pending a purchase if he does decide that way by a good friend of mine who is very very handy (much more than me if I can even say so with tounge in cheek cos I am the worlds best cross referencer IMHO, and heck I am the master of finding what else is close enough and I try to shove it in there)
So anyway the brake pad is just under 3 mm shorter top to bottom, and just about 2mm wider front to back as it sits in the bike lets say. That extra length didn't matter, it still fit like a glove in the caliper, and not really too tight nor too loose he said. Then the shorter height, I am thinking that is mostly the top side - 3 mm you'd expect it to have 1.5 mm top and 1.5 bottom - logically - and I suspect its not, cos the sv has a bent piece of steel as a spring holding the pads down as it were. I unscrewed the SV's brake pad retaining pin and it literally spit the pads out. Essentially I think the sv's pivot is set higher relative to the bottom edge of the pad. 3 mm shorter translates to pretty much the same contact area. The overall effect - it works like a charm - as I have been told and my friend is a genuine mechanic car and diesel truck by training and has lived on motorcycles since he was a wee one. Fits like it was made for it were his words. He also said the sv's brake pad hole was elongated slightly - he just rounded it.

Then the twin disks and weight etc etc ... probably, but really not enough to make a difference. I can tell you however that twin disks get the front end twisting less under braking especially. On a GS500 where you go from the 1 disk of the stock FE to the larger 41 with twin disks the biggest difference we feel is under braking. A GS wants to twist with a stock FE.
BTW I know I could probably sell the MZ's fork legs on fleabay for 2 X what a katana FE would cost me. Besides, I have 2-3 lying about cos I been swapping them onto GS'es for years.
Cool.
Srinath.

[Bill Jurgenson]

Then the twin disks and weight etc etc ... probably, but really not enough to make a difference. I can tell you however that twin disks get the front end twisting less under braking especially.

beg to differ.
they certainly do make a difference in unsprung weight and that by a lot.
they are also totally unnecessary.
Front end twisting? On what planet do you live?
Having owned a few Skorpions, all more or less tuned and raced them too, I cannot attest to any such thing within the reality frame of this bike.
For one season we even went to twin rotors (using only one for wet conditions) and dropped it 'cause it was not worth it. |On the contrary, the additional "stopping power", even for our nearly 80hp, was potentially dangerous in the dry and not usable at all in the wet, the additional unsprung weight had bad influence on the both on acceleration and cornering.
And we were using Brembo Racing rotors with aluminum webs.

and a hollow axle.

True, the USD fork is a bit stiffer, but all the others had the RSU Paioli with Wilbers resp WP progressive springs.

This was my blue Tour, named the Toy, which I reassembled for a friend as track day bike, using a few goodies from the racer like the Marvic mag wheels and the ABM Billet caliper and radial pump.
This is the balancer-less motor with rearwheel 60hp, over 80tkm and still with original crank and conrod, valves and guides - and SZR cluster.

If one has to go to twin rotors, then to smaller rotors (280mm) such as the Replika had.
But from strictly functional vantage point, there is absolutely no reason for twin rotors.
Plently of reason, tho, for replacing the Grimeca shit with Brembo (plug and play anyway), both pump and caliper.

[Srinath]

If you're comparing the MZ to the GS - the GS has the world's crappiest forks - 37mm and the fork brace on a GS500 does little more than keep the fender off the tire.
The skorpion has better forks and better fork brace. On a GS500 putting a 1/2 inch thick brace makes a easily discernible difference in braking. That makes it the hottest selling item second only to a jet kit.
On gstwin, there have been 3-4 different hobby machinists who have cranked em out including yours truly, on 2 different continents (australia and US) and I can assure you, they have trouble keeping em in stock. A GS the brace really makes a easily feelable difference.

So does that happen to where you can feel it on an MZ - probably not, I didn't feel it on mine, but does it not happen - I really doubt it. That push from the caliper to the fork - its not 0, it cannot be 0. The force also is imparted only to the leg the caliper is fitted to - the right. Now on a twin disk FE, there is forces from left and right calipers that are transmitted to the leg. I really dont even doubt that those 2 are unequal. However I also would guess they are close to each other, thereby pushing both legs with approximately the same force, the legs are are likely not the exact same stiffness, they can either attempt to cance or compound ... all of that effectively is going to leave you with a net twist even with a twin disk setup. Likely that net is going to be too low for anyone to notice, the stock MZ single disk is likely low enough to not have anyone feel it, and on a GS500 seeing as its front end is made out of pasta and cheese, easily bends enough to send most aggressive/experienced riders scrambling to the nearest machine shop or the nearest dealer or the nearest psych ward.

It actually crystalizes for you when you ride something else cos a lot of GS riders are beginners, so either a GS with a kat FE, or a bike with a proper twin disk setup before you notice its wiggling under braking.

Cool.
Srinath.