Hi,

Could anyone who has completed this mod please help.

I have got some YZ forks to fit to my 59 plate tenere.
After looking a brake options: YZ with oversized disk is expensive to get a 320mm disk is �170.
A standard Tenere disk being 300mm i was going to try removing one disk and associated bits and run a single Tenere disk on standard wheel. After getting over the spindle size issues.

I know i will need to change the master cylinder but dont know what for? 11mm piston ???

If anyone can see any other problems with my plan please speak up.


I ride solo, very little kit and weight 80kg kitted and soaking wet.

thanks

Hi,

Think i have found the answer to my question.
Link below incase anyone else needs similar infomation.

http://vintagebrake.com/mastercylinder.htm

Cheers

Very interesting link, thank you.

What did you do with your brakes?

Hi,

I'm almost done with conversion to YZ forks. Just waiting for some inner parts of forks.
I was considering using 2 piston brake caliper but I switched to 4 piston because tenere is big bike.
In fact, pistons in Tenere calipers are the smallest ones:
Caliper cylinder inside diameter
32mm - 30mm � 1 in XT660R with Disc 298.0 � 4.5 mm
34mm - 30mm � 2 in XT660X with disc 320.0 � 4.5 mm MC - 12.7 mm
28mm - 28mm x 2 in XT660Z with Disc - 298.0 x 4.5 mm and MC - 16mm
So if you want to reuse some brake caliper I would use different ones then original Tenere. For example BMW f650GS has also just one brake caliper with 300mm disc.
Useful links:
http://www.f650gs.crossroadz.com.au/ForkUpgrades.html
http://advrider.com/index.php?thread...99113/page-271

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Yamaha XT 660 Z Tenere

I got a braking 320mm disk and used the original yz caliper and master. Tried Tenere caliper with YZ master but brake was very snatchy not much feel. Got an xt660x four pot caliper but would need to space the disk out slightly to allow it to clear the spokes. might try it one day though.
The pad coverage on the disk is smaller than with xt caliper but for my use its great. I know it will wear faster but not going around the world so should be fine.

Its a bit tricky to use 4 piston caliper with usual wheel, as you mentioned you need to use spacer under disc for clearance. I did that.
Good to know that original YZ brake is working ok with 320mm disc.
If I may ask which year of YZ fork have you used?
I used YZ250F 2008 and had problem with broken free pistons in cartridge.

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Yamaha XT 660 Z Tenere