DR650: Where to get...

[andy230]

Hmmmm.  I had a bit of a "road to damascus" as I lay unable to sleep.

Subsequently went back out, removed the caliper (this morning!).  Diameter is indeed 27mm.  But I cannot see the piston being 31mm deep, my caliper just isn't deep enough to accomodate this.

The *internal* depth is 19mm, and from the "bearing" surface (ie back of pad) to the *outside* of the caliper (ie.  I haven't removed the pistons) is 31mm....

The "back" of the piston wouldn't be a big (unsprung!) lump of 10+ mm of metal, leaving the pads proud, would it??

So I think this is what I need (but pref. s/s!) -->

http://motorcycleproducts.co.uk/catalogue/caliper-piston-suzuki-dr650r-199094-rear-p-217672.html

However, googling the suzuki part no gives -->

http://www.cmsnl.com/suzuki-dr650-1993-rup_model13256/partslist/FIG-50.html

which would make sense, its just that these pistons seem to be "long and thin (ie. 27x31) as opposed to "Short and fat" (presumably 27 x 22).  May just be an inaccurate diagram tho... (same as my OEM suzi manual)

Will google some dimesnsions and other models....

cheers.... I am a boring bastard, I know!

a

[pigafetta]

It's never simple, is it!

I had similar issues with my French import XL.
It looks like you're getting somewhere. It's strange though, that the RSEM and RSEN are listed elsewhere with 31mm depth pistons.

I must admit, if I were you I'd have given up and pulled the bugger out and measured it my now 

Dave B

[andy230]

Heh!

Yeah, I know, I was trying not to remove the pistons until I had new ones to put in.

But then, I'm not using the back brake just now anyway, so I dont suppose its much odds....

I will pump it out tonight I think, and try to force the piston back in.  THat way, at least I'll have *some* rear brake   

It looks like you're getting somewhere. It's strange though, that the RSEM and RSEN are listed elsewhere with 31mm depth pistons.

I'm probably just being a dick.  If they are 27x22, this looks good.  -->

http://cgi.ebay.co.uk/Tokico-6-pot-Calipers-Stainless-Steel-Pistons-Large_W0QQitemZ280627092714QQcategoryZ36796QQcmdZViewItemQQ_trksidZp5197.m7QQ_trkparmsZalgo%3DLVI%26itu%3DUCI%26otn%3D5%26po%3DLVI%26ps%3D63%26clkid%3D7591862442050791464

Can you see a problem in fitting non "Suzuki DR650 pistons" to my caliper??  27mm is a nominal measurement anyway, right??  They should be just under that, not 27.000mm?


cheers

a

[Ian]

Andy, I have only just read this thread. I can probably make you the pistons if I can locate some material and you supply the exact sizes or even a sample.
Just a thought.

HTH

Ian

[pigafetta]

I don't reckon it'll be a problem. My XBR pistons weren't bike specific, I just went by size. I've just checked my ebay feedback out of curiosity and my pistons came from here...


http://www.rd-bitz.com/r2.html

Dave B

[andy230]

27mm x 22.5   

THink I have found some s/s ones...

Andy, I have only just read this thread. I can probably make you the pistons if I can locate some material and you supply the exact sizes or even a sample.
Just a thought.

HTH

Ian

Very kind Ian, ta, I may tale you up on it if no joy.  Lovely, thanks a lot mate,

a

[andy230]

Got s/s pistons!
Got red grease!
Hopefully have seals waiting for me at home!

Will let you know.  With a back brake, I can start riding like an eejit again!   

a

[002]

Got red grease!

Renolit Red Rubber Grease I Hope !

Jethro