Oversizing brakes

[nathanwhite]

Thanks to DucatiLover I have a donor ZZR600 caliper and master cylinder for my bucket now.

However as soon as I tried to work out placement I noticed that it's hitting the spokes. Seems the wheel is designed for a 2 pot caliper or something. Weird.

Anyho I'm wondering if spacing the disc out (properly or not) so the wheel can accomodate it would have any adverse reactions on the handling of the bike? I can't imagine ~300g extra further out on one side would be good.

[F5 Dave]

That's probably not weird at all, the calliper will be made for more offset on the disc or skinnier spokes & the wheel will be for a 2 pot slider calliper which was common on Kawis & Hondas of the 90s.

So offsetting the disc is an option, but you have to be very careful. Handling won't be affected worth mentioning, - but are you going to ask the bolts to act in shear alone? Not a good idea. Picture of the wheel without a disc would help. A turned spacer with a shoulder is likely the safe way to do it.

erm. . .a ZZR600 master cylinder will be a 5/8" bore most likely & designed for a 2 calliper system. you'll want a 1/2" or maybe 12 or posibly 11mm bore master cylinder or you'll be pushing it up hill. At which stage you question if you have the right calliper for an easy transplant, free or not. A late 80s/90s CBR400/600 one would work well.

[crazy man]

Thanks to DucatiLover I have a donor ZZR600 caliper and master cylinder for my bucket now.

However as soon as I tried to work out placement I noticed that it's hitting the spokes. Seems the wheel is designed for a 2 pot caliper or something. Weird.

Anyho I'm wondering if spacing the disc out (properly or not) so the wheel can accomodate it would have any adverse reactions on the handling of the bike? I can't imagine ~300g extra further out on one side would be good.

for a kick of what type of bike of chassy is it going on?

[FJRider]

Take the old caliper into a bike wreckers and find (a better) one that WILL fit.

[nathanwhite]

That's probably not weird at all, the calliper will be made for more offset on the disc or skinnier spokes & the wheel will be for a 2 pot slider calliper which was common on Kawis & Hondas of the 90s.

Tongue in cheek comment. I know they are designed for each other.

So offsetting the disc is an option, but you have to be very careful. Handling won't be affected worth mentioning, - but are you going to ask the bolts to act in shear alone? Not a good idea. Picture of the wheel without a disc would help. A turned spacer with a shoulder is likely the safe way to do it.

I'll go digging for a pic.

erm. . .a ZZR600 master cylinder will be a 5/8" bore most likely & designed for a 2 calliper system. you'll want a 1/2" or maybe 12 or posibly 11mm bore master cylinder or you'll be pushing it up hill. At which stage you question if you have the right calliper for an easy transplant, free or not. A late 80s/90s CBR400/600 one would work well.

Can you explain why a smaller bore on the master cylinder would work better? I'm still trying to learn all this stuff

for a kick of what type of bike of chassy is it going on?

Suzuki EN125. Have a look over in General Maintenance

[crazy man]

how close is the calaper to the spokes? l know on rs125 you have to remove metal of the calaper to clear the spokes on a after market rim

[nathanwhite]

how close is the calaper to the spokes? l know on rs125 you have to remove metal of the calaper to clear the spokes on a after market rim

I found some pictures!



and front wheel on the right



Spokes may not be the right word, but I don't know what else to call them.

[bucketracer]

Spokes may not be the right word, but I don't know what else to call them.

Yes, you are right, they are Spoke wheels, they have alloy spokes.

wooden spokes


wire spokes

[koba]

The EN I had for a short while had more than enough brakes.

Are you wasting your time/effort/money on this?

[Bert]

The EN I had for a short while had more than enough brakes.

Are you wasting your time/effort/money on this?

I concur koba. that setup doesn't look that different to a RG50 setup... never had an issue with them...
new pads and you will be away laughing.

[nathanwhite]

The EN I had for a short while had more than enough brakes.

Are you wasting your time/effort/money on this?

I concur koba. that setup doesn't look that different to a RG50 setup... never had an issue with them...
new pads and you will be away laughing.

#1 wouldn't it be awesome to have 4pot calipers?
#2 I have already rooted one caliper and cannot have another stuck one. This was offered to me so I thought I might give it a shot.

I'll have a look into rg50 calipers also

[Bert]

#1 wouldn't it be awesome to have 4pot calipers?
#2 I have already rooted one caliper and cannot have another stuck one. This was offered to me so I thought I might give it a shot.

I'll have a look into rg50 calipers also

#1 maybe... but not needed.
#2 really; they hard to stuff up what's actually wrong? seized? stuffed seal? hammer???
(but if new one free then all good)..

Rg50 caliper = rocking-horse shit. there will be some around...

[nathanwhite]

#1 maybe... but not needed.
#2 really; they hard to stuff up what's actually wrong? seized? stuffed seal? hammer???
(but if new one free then all good)..

Rg50 caliper = rocking-horse shit. there will be some around...

erm. Stripped inner thread on the caliper of the pad retaining bolt due to drilling the bolt out because it was seized.
2nd caliper also has a seized bolt, but I'm not going to drill that

[speedpro]

RG50 brakes aren't up to it on a faster bucket on a faster track. A good mod is to fit a NZ250 disc if you can find one. It has the same bolt pattern as an RG50 and the same offset. Then you just need to extend the caliper mounting plate. I still found the Vesrah redback pads overheated and cracked all over and lost chunks. The red paint also got scorched off at places like Wanganui. Even the bigger disc turned blue but at least it kept working.

A 2-pot caliper with both pistons on the same side has the same braking pressures as a 4 pot but may be slimmer on the wheel side. I found the RG50 caliper to be OK. Having said that I now use an early RS125 master cylinder and caliper onto an early 2KT FZR250 disc.

Big brakes may not provide more ultimate braking capability but may require a lot less effort to use making the bike easier to ride fast.

[Henk]

erm. Stripped inner thread on the caliper of the pad retaining bolt due to drilling the bolt out because it was seized.
2nd caliper also has a seized bolt, but I'm not going to drill that

Break out the Dremel, make a hole in the pin on the inner side and keep it place with either a split pin, R clip or lock wire?