Replacement Master Cylinder - '82 450E/single disc

[Guest]

Guys, just after some clarification on finding a replacement front master cylinder for my '82 450E.

From what I've found by searching, it seems that anything with around a 13 - 14mm piston bore size will be suitable as it's a single disc setup. Is that right?

Also, most of the ones I've seen on eBay quote the banjo bolt size rather than the piston bore size. Any clue as to how that would translate? Otherwise how do I find this out? I don't expect an online parts fiche will tell me piston bore size...

[Guest]

So, I'm guessing I wasn't quite as awake and capable of searching as I thought I was this morning...

14mm is the normal stock size for the single disc setups, no doubt there now at all.

My frustration now is with eBay sellers that insist on listing only the banjo bolt size. It's good to know what that size is too, but the piston bore is just as important.

So, going by other things I've found on here, there should be a 14 marked on the master cylinder somewhere so I can ask eBay sellers to look for that, am I right?

Aside from all that, has anyone tried the cheap ones from Thailand and Hong Kong? The price is great but I'm not so sure I should be trusting them. I do hold to the "you get what you pay for" thing...

Here are some examples:

http://cgi.ebay.com.au/Front-Brake-Pump-Master-Cylinder-Honda-KTM-Ducati-/370450889204?pt=AU_Motorcycle_Parts_Accessories&hash=item564097f9f4#ht_2774wt_905

http://cgi.ebay.com.au/Front-Brake-Master-Cylinder-Honda-CB400-92-98-New-/400211271093?pt=AU_Motorcycle_Parts_Accessories&hash=item5d2e735db5#ht_4000wt_912

http://cgi.ebay.com.au/Axial-Front-Brake-Pump-Master-Cylinder-Oil-Cup-Holder-/320685118218?pt=AU_Motorcycle_Parts_Accessories&hash=item4aaa52930a#ht_2735wt_905

[Guest]

So it seems my searching didn't find this, just stumbed upon it looking at New Posts:

http://www.thegsresources.com/_forum/showthread.php?t=174404

However, should there be a marking on the cylinder somewhere to indicate the piston bore size? Maybe I'm missing something else in my searching...

[Guest]

I'm canning this thread now and will continue on with the alternate thread I found in the previous post...

[ChicagoBob]

Mikes XS offers a selection of master cylinders, and identifies their bores.

[Guest]

They do indeed! Feel free to picture me slapping my forehead here...

They also have AUD figures on the site, so less than $80 plus shipping for a brand new one... that ain't rocket science!

Thanks mate

[Guest]

Thanks again Bob, ordered the 13mm piston bore master cylinder tonight.

[ChicagoBob]

Here's a picture of the unit installed (08-262). One difference with this particular one is that the brake line mounts to the front, so it's turned 90 degrees from stock, and I had to twist my brake line 1/4 turn to mount it, so I ordered a new braided one with the ends oriented in the same direction. I got the "matching" clutch lever from Mike's, also.

I used drag bars on 3/4" risers so the master cylinder and brake would fit so close to the forks.

[ChicagoBob]

Another photo:

[Guest]

Good stuff, thanks for that!

I still have my old brake line so I'll be able to check that out as well before ordering a new braided one, thanks for the heads up.