Further to Gangstahat's note above regarding 750 Seca rotors, there seem to be several similar stock rotors from different early '80's Yamaha models that could be direct, bolt-in replacements for the stock 7mm thick XS650 rotor. I bought and installed a 5mm thick one that likely came off an '80-'81 XS850 or 1100, which used the same rotors at the right front and rear - you would want a right-hand one, in order to have the slots slanted correctly. Seems to work just fine with the stock XS650 caliper and master cylinder. I didn't weigh the original 650 rotor and the 5mm one, but just by picking them up, I could tell a significant weight difference. Poor man's Brembo, I guess.Thanks for all the info. Great stuff. Cant really get those XJ750 Seca rotors in the UK I dont think.
I'll be putting in Hughs 2in lowering kit (which I also procured from Pandemonium) so I'll look at my forks then. Will your instructions change with lowering Leo? Cheers
Got confirmation from Pandemonium about drilling the callipers. Yes, its so the bolt goes through the caliper and then threads into the adapter plate (doesn't thread onto the caliper). SIlly me.
Got another decision to make..... The kit recommends filing down the caliper to fit the xs rotors / disks. I have a couple of buddies here in the UK that left their calipers alone and had their standard disks skimmed instead. What are the pros and cons of either route? Which would be best to do?
cheers for all the help. Love this forum
I made up the caliper adapter plates from 3/8" aluminum. I still have the templates for the adapter plates if you want a copy.
Hi mate, wondering if you still have a template for those adapter plates? And also, will they work for 34mm forks?
Cheers
Any adapters need to be different for 34mm forks, the caliper mounting points aren't the same. For reference https://www.pandemoniumc2.com/parts-store/Pandemonium-Brake-Kit-TM-35mm-&-34MM-for-XS650-p46227518
A bit of playing around i could probably get it. I do enjoy fab work, though im relatively inexperienced.
Do you think this is worth the trouble or should i bite the bullet and buy one and support a business.
Cheers
The Brembo calipers RG used come in 42mm and 65mm bracket mount spacing...........RG had the 65mm
The odd tip bit in these
http://www.xs650.com/threads/brembo-brake-adapter.23552/
http://www.xs650.com/threads/brembo-rear-brakes.20951/
Thread is on blue spot Yam calipers, Post #99 refers to brembo 4 pot caliper bracket.
http://www.xs650.com/threads/fazer-blue-spot-caliper.197/page-5
P.S. Be sure the bracket you are making is suited to the caliper you have. Earlier brembos require/have a greater distance between the bolt hole mounts in the caliper. e.g. the one offered by motolanna suits the later brembo caliper with the shorter hole mounting...and is different to the one shown in post #99 in the above link.
I'd suggest buying you're calipers first if you haven't done so already and go from there once you know what you're working with.....good luck.
Then you will need M10x1.25 mounting bolts for the calipers. A flat plate adapter will require a disc offset of 21 mm, for a 5 mm thick disc, and an XS with 35 mm forks. If that is enough for spoke clearance, I cannot say. My ISR disc has 23 mm offset and is 5 mm thick, so I had to use 2 mm thick washers between fork lugs and adapter plate. I plan to spot face the plate around the caliper holes 2 mm later, and remove the washers. (Adapter plate is 12 mm thick)Cheers guys, I bought my caliper and it has 65mm, so from here im going to use all this info and start mocking up some test adapters.