|
|
Post by souledout1 on Jul 10, 2008 22:30:13 GMT -5
Okay, so I'm new here and I would wager a bet that this HAS been answered before. The brakes on my 1980 sr500 are very very soft and the rotor looks cracked near where it bolts to the hub and is certainly rusty, gouged, and hideous to look at. I'd like to replace it and am hopeful that an aftermarket xs650 rotor will fit not only the hub but the stock caliper as well. I understand that the bolt pattern will match and that just leaves the dishing and master cylinder.
To get to the point, what will be required to fit a new xs650 rotor from mixesxs.com?
I am planning to rebuild the caliper/replace the pads, and am prepared to replace the master cylinder as well. I am just looking for a single disc setup.
Any help is appreciated as I am a newb beyond newbs!
Cheers from Santa Cruz,
Aaron
|
|
|
|
Post by solo2racr on Jul 10, 2008 22:56:27 GMT -5
Some of the 650 discs are different but I'm not sure what years. But, I DO believe that they are the same for the SR for the same year. Anyone want to confirm this???
|
|
|
|
Post by souledout1 on Jul 10, 2008 22:59:20 GMT -5
Thanks for the quick reply, and let me clarify: these rotors are to fit straight away on '77 to '84 xs650's. It seems like a better choice than finding an old sr500 rotor and having it refinished and drilled assuming it will fit.
|
|
|
|
Post by souledout1 on Jul 10, 2008 23:01:18 GMT -5
Just for the record, they look really sick, are about half the weight, and cost $130.
|
|
|
|
Post by solo2racr on Jul 11, 2008 0:09:40 GMT -5
I know what discs you are referring to. But.......Before you go and get one of them, rebuild your caliper and probably your master cyl too think about this. What are you after? If your going for a caferacer look or a street tracker look, consider a larger diameter disc and maybe a different caliper. There are a number of Yamaha discs (Ducati too) that have the same bolt pattern as what you need. Your 1980 model, I believe, should have wire spoke wheels. You can also mount an opposed piston caliper (Yamaha RD calipers are a straight bolt on with the stock disc) and maybe others. All this stuff could be sourced off of eBay for the same or less $$ than the new disc by itself.
Just a thought.
|
|
|
|
Post by aero on Jul 11, 2008 5:08:21 GMT -5
The SR shares the same forks and brakes as the 1977-82 XS650.
EBC do a similiar disc here in the UK, its just a direct bolt on replacement part.
The early Yamaha calipers may bolt on, but they are heavy and VERY expensive to get parts for. I have just had to renew all the seals in the twin disc set up my 650 it cost £50.($100 US). I've just looked on Mikes XS and seen the prices there, but he won't sell to the UK.
Also the SR reacts badly to having extra weight added to the front end. The handling become very twitchy on bumpy roads.
|
|
|
|
Post by souledout1 on Jul 11, 2008 12:19:34 GMT -5
I'm looking to keep the setup single disc, and the new rotor would actually drop the weight about 3 lbs. I have found SR discs on ebay for $30 to $40, however, they will most likely need to be turned ($40 to $50) and if I want them drilled another $50 to $75. So why not just pick up the xs rotor for $130 and save 3 lbs??? I can put stuff together but don't have the ability or the friends to to advanced metalwork and fab type stuff.
As someone has said, the xs and sr's from 77 to 82 share the same forks and brakes so it should fit right on, right??
|
|
sven
Full Member
Posts: 166
|
Post by sven on Jul 11, 2008 12:28:05 GMT -5
I'm not sure but the old XS650 discs are definitely smaller in diameter (267mm instead of 298mm) and thicker than the SR discs.
Regards
Sven
|
|
|
|
Post by pablosrfivehundred on Jul 11, 2008 12:45:43 GMT -5
Also the SR reacts badly to having extra weight added to the front end. The handling become very twitchy on bumpy roads. I did the dual disc set up on my SR500, and found no problems. |
|
|
|
Post by solo2racr on Jul 11, 2008 12:51:44 GMT -5
I can put stuff together but don't have the ability or the friends to do advanced metalwork and fab type stuff. Then your best bet would be to get the disc your talking about. I'm not sure but the old XS650 discs are definitely smaller in diameter (267mm instead of 298mm) and thicker than the SR discs. Regards Sven The thickness was what I was referring to. Mikesxs says the disc is 298mm DIA. so that shouldn't be a problem. I would contact them and get a thickness measurement to be sure. Although, if it's thinner, it probably won't make a difference. Thicker though.....  |
|
|
|
Post by pablosrfivehundred on Jul 11, 2008 15:13:53 GMT -5
i have a xs650 disc if you need one.
|
|
