Author Topic: New member new XS500 owner  (Read 4009 times)

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Offline Joffa1

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Re: New member new XS500 owner
« Reply #15 on: March 08, 2018, 09:51:17 AM »
None of the XS650/850/1100 rotors Iím finding online are 5mm thick. They are all 7mm or a little less if heavily used. Really keen to find lighter weight rotors but donít really want to fork out hundreds of dollars for them...

Offline guylr

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Re: New member new XS500 owner
« Reply #16 on: March 09, 2018, 02:57:28 PM »
For the front use 2H7-25831-00-00 rotors which are found on SR500, XJ550R and XV535 models and others. They are 298mm in diameter and 5mm thick without slots. The 2H7 model prefix is for the XS1100 but I'm not finding any years that list it as a rotor on those bikes.

For the rear use 1L9-25831-00-00 which are used on XS360, XS400 models as front rotors and also SR500 rear rotors. They are 267mm solid rotors and 5mm thick.

Guy
Now Retired Yamaha guy. Cut me and I bleed "Cinquasia Red"

Offline guylr

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Re: New member new XS500 owner
« Reply #17 on: March 09, 2018, 03:19:16 PM »
Here's some additional front rotor info. I just bought a pair of XJ750R SECA front rotors. They are the slotted versions of the 298mm 2H7 rotors. The original part numbers were 5G2-25831-00-00 for the right side and 5G2-25831-10-00 for the left. The left got superceded to 3JB-25831-00-00 as used on the later models of the XV535 Virago.

Here's the eBay listing on the ones I bought. Crackin' price too.

https://www.ebay.com/itm/1981-1983-YAMAHA-SECA-MAXIM-XJ-750-XJ750-FRONT-DISC-BRAKE-ROTORS-LOW-MILES-/201721159366?hash=item2ef7849ec6:g:6E4AAOSwB09YLdRn&vxp=mtr

I'm upgrading to 36mm fork tubes with modified TX750 sliders and TZ750 alloy calipers. Should be a real stopper and light too with the slotted 5mm thick rotors.
Now Retired Yamaha guy. Cut me and I bleed "Cinquasia Red"

Offline Joffa1

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Re: New member new XS500 owner
« Reply #18 on: March 10, 2018, 12:13:02 AM »
Awesome thanks again!

Offline Joffa1

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Re: New member new XS500 owner
« Reply #19 on: March 10, 2018, 12:28:07 AM »
Sorry is it just the Seca rotors that fit or will the Maxim fit too? Only ask as there seem to be more of those available from that 81-83 era...

Offline Joffa1

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Re: New member new XS500 owner
« Reply #20 on: March 10, 2018, 01:43:21 AM »
Iím also in the market for some lighter Calipers... are there other options apart from the alloy tx750 ones?

Offline guylr

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Re: New member new XS500 owner
« Reply #21 on: March 10, 2018, 01:02:00 PM »
The only alloy ones that fit directly without adapters to the 1973 thru 1975 500 forks are TZ750 and TZ250. I don't know any that will fit the 76 and later forks directly but there are any number of modern alloy calipers will fit all years with adapters.

Guy
Now Retired Yamaha guy. Cut me and I bleed "Cinquasia Red"

Offline guylr

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Re: New member new XS500 owner
« Reply #22 on: March 11, 2018, 03:46:10 AM »
I think the Maxim 650 single rotor is the 2H7 part and will work but the 750 Maxim used the smaller 267mm  dual rotors.
Now Retired Yamaha guy. Cut me and I bleed "Cinquasia Red"

Offline Joffa1

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Re: New member new XS500 owner
« Reply #23 on: March 13, 2018, 06:42:25 AM »
Nice one. Have bought a pair of 750 seca rotors in pretty good nick off eBay. With shipping to Australia they donít end up that cheap but will end up with slotted and lighter rotors than what Iíve got so happy with that. Have also ordered some braided lines.

It looks like all the bleeding in the world isnít giving me any pressure at the front brake lever so Im thinking either the master cylinder and or the Caliper seals are gone? Is there something that goes commonly wrong with these XS500 brakes when theyíve been sitting a while?

Thinking Iíll just order master cylinder and Caliper rebuild kits from Mikes XS and rebuild everything while Iím at it.

Happy to hear any advice though!

Offline guylr

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Re: New member new XS500 owner
« Reply #24 on: March 13, 2018, 01:48:30 PM »
Unless the piston bore in the master cylinder is badly pitted it should build pressure. The original calipers are not great but they do work if in good condition. Rebuild kits should get you going.

Guy
Now Retired Yamaha guy. Cut me and I bleed "Cinquasia Red"

Offline guylr

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Re: New member new XS500 owner
« Reply #25 on: March 13, 2018, 05:19:48 PM »
Did you measure the diameter of your rotors? I just looked at the photo and wonder if yours are the smaller dual disc size that we didn't get here or if they are the 298mm rotors. The smaller size is the same 267mm as the rear rotor. The SECA 750 fronts are the large ones.

Guy
Now Retired Yamaha guy. Cut me and I bleed "Cinquasia Red"

Offline Joffa1

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Re: New member new XS500 owner
« Reply #26 on: March 14, 2018, 12:07:25 AM »
Yeah ok will have to investigate the lack of pressure a bit more... in regards to rotors I am a fool and didnít measure diameter, must have got excited when I saw the seca ones come up!

I Will have to check when I get home...

Offline Joffa1

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Re: New member new XS500 owner
« Reply #27 on: March 14, 2018, 05:28:17 AM »
Can confirm the dual front rotors on the 1976 Australian XS500 are 298mm so the ones Iíve ordered will fit thank god. Also found the compliance date the other day and can confirm itís a March 1976 bike. Does that make it a XS500 B, C, D, Or E?

Offline guylr

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Re: New member new XS500 owner
« Reply #28 on: March 15, 2018, 02:23:51 AM »
That's  a 1976 C model.

Guy
Now Retired Yamaha guy. Cut me and I bleed "Cinquasia Red"

Offline Joffa1

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Re: New member new XS500 owner
« Reply #29 on: March 15, 2018, 08:00:16 AM »
Great thanks. A guy is selling an original workshop manual for her which I think will be a worthwhile purchase...


https://m.ebay.com.au/itm/Yamaha-XS500-C-XS-500-C-XS500C-original-FACTORY-spare-parts-manual-book-/231010766604