SV650 Brakes on a GS450

[djg42]

Hello!
I just saw a 1986 GS450 with the left caliper and disk installed from a SV650!
They just bolted right in no problem! im wondering if this might work on my 1980 GS450, and if it may be possible to use the rear brakes of an sv650 to upgrade my drum brakes to disk brakes? any insight would be great!
Thanks,
Dennis

[bleed gasoline]

keep in mind if you want rear disc you will most likely need a new swing arm with disc brake mounts svs are monoshock rear so that will require some creative fabrication. if you want disc rears youe are better off looking within the gs series

[djg42]

Thanks! Which GS series do you think would be appropriate?

[pete]

Interesting to know! A 550 swingarm if any would probably be the most likely, but it would need to be measured etc...

[djg42]

Thanks!
Im going to start with the front end, ill keep you posted!

[pete]

Please do, it's always good to know what fits these as most mod's are only for the bigger bikes...

[djg42]

ok, I got all the parts.i noticed the banjo fittings are smaller on the Cv65o caliper etc.., so i guess Ill have to use the master cylinder+brake from the SV650 as well. i had hoped just to attachh my steel braided line to the new caliper.
Ill have to find a suitable brake line for this, becuase the SV650 brake line is meant for two calipers.

[pete]

Pretty sure the lines themselves are the same and you'll just need a custom line with the right size bolt on it.

[djg42]

ahh, so I can just get a different sized fitting that would thread into the same steel brake line I have?

[pete]

Yup, measure away and get it from somewhere like this:

http://cgi.ebay.com/ebaymotors/SUZUKI-GS500K-CUSTOM-STAINLESS-STEEL-BRAKE-LINE-HOSE-/120774075945?pt=Motorcycles_Parts_Accessories&hash=item1c1eb22629

Or make your own from Earl's plumbing (I think that's the place).

That eBay seller has a good reputation on here and I'm thinking that's where I'll get mine from too.

[salty_monk]

Be very surprised if they are not 10mm standard banj0 fittings... I have a set of those brakes on the shelf I believe.
They do use a 12mm wrench on the bolt not a 14mm though...

[djg42]

Thanks! It looks like its 10mm, but my 10mm banjo bolt doesn't thread into the caliper. I think the threading is different somehow on the SV650.
Do you think there is any advantage of using the Master cylinder from the SV650 or can i just use mine?

[Curly]

It'd be better to use the SV unit with the SV caliper, newer is usually better. Banjo bolts seemed to change pitch somwhere in the 90's, from 1 to 1.25, or 1.25 to 1.5, I forget. My Katana front end was the same, different thread pitch on the 10mm banjo bolts.

[SVSooke]

It'd be better to use the SV unit with the SV caliper, newer is usually better. Banjo bolts seemed to change pitch somwhere in the 90's, from 1 to 1.25, or 1.25 to 1.5, I forget. My Katana front end was the same, different thread pitch on the 10mm banjo bolts.

It's from 1 to 1.25.

[pete]

I'm going to guess the master cylinder is a slightly smaller piston bore on the SV which I believe means a little more travel but more pressure.

Stock is 14mm, I'm guessing the SV may be 13mm...

I'd definitely go the SV either way as long as it's in good nick.