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PostPosted: Wed Feb 29, 2012 16:09 pm 
Hurricane
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Joined: Tue Dec 28, 2004 16:59 pm
Posts: 1870
Location: Dorset (any further south and I'd fall off!)
Probably the engine cylinders!

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PostPosted: Wed Feb 29, 2012 16:12 pm 
Hurricane

Joined: Mon Sep 05, 2005 02:46 am
Posts: 332
Location: fordingbridge Hampshire
Talk to John Wheaver, Wheaver Engineering, and explain what you want,he is a bit of a whiz when it comes to sorting out the bore size needed to operate brakes ans such.

Stix


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PostPosted: Wed Feb 29, 2012 23:17 pm 
Hurricane

Joined: Sun Feb 20, 2005 17:29 pm
Posts: 293
Location: Pimperne, Blandford, Dorset.
A lot of custom risers are made for 1inch bars and come with shims so you can use 7/8ths bars in them.
I bought a lot of risers from M&P when they were having a sale and when they arrived they were 1inch.
You can buy the shims to fit 7/8ths bars but I use 1 inch stainless tube in my gearchangers so it's cheaper for me to make the shims as I need them, plus i'm too tight to buy them.



williamv1203 wrote:
AdeN wrote:
I make spacers to fit 7/8ths bars in 1 inch risers, it would be the same to fit 1inch master cylinder to 7/8ths bars.


+1 here.

I was going to say something along these lines about using a piece of thin walled pipe, cut to length, then in half to take up the excess.
Changed my mind, thinking that it would be shot down.

My fork brace is fitted similarly. It is for a set of forks that are ~2mm larger diameter and I have a thin wrap of steel around the fork legs to compensate for this.


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 Post subject:
PostPosted: Wed Feb 29, 2012 23:21 pm 
Hurricane

Joined: Sun Feb 20, 2005 17:29 pm
Posts: 293
Location: Pimperne, Blandford, Dorset.
Rubber would be too soft to make shims with, you want something that won't flex when the brake is applied.
You could make them with a hard nylon material.
I use 1inch bore clutch levers on my gearchangers and they come with a nylon shim so you can use them on 7ths bars.
Personally for a brake metal is the safest as you want zero flex, you want the mastercylinder tight on the bars.


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 Post subject:
PostPosted: Wed Feb 29, 2012 23:24 pm 
Hurricane

Joined: Sun Feb 20, 2005 17:29 pm
Posts: 293
Location: Pimperne, Blandford, Dorset.
That's the pistons:
Bore = 102mm diameter.
Stroke = 90mm up & down.


DanEDS wrote:
All i've been able to find on the specs is that of the bike and all it says is:

Bore and Stroke: 102.0 x 90.0 mm.Don't know if that means the brakes or the clutch though :?


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 Post subject:
PostPosted: Thu Mar 01, 2012 11:15 am 
Junior

Joined: Mon May 07, 2007 13:23 pm
Posts: 42
Location: Halesowen,West Midlands
i messaged the kwak clutch seller again and he said it says 14 underneath so i'm guessing that's still not enough? :?

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PostPosted: Thu Mar 01, 2012 22:45 pm 
Hurricane

Joined: Sun Feb 20, 2005 17:29 pm
Posts: 293
Location: Pimperne, Blandford, Dorset.
Not really, you want as big as you can get.


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 Post subject:
PostPosted: Fri Mar 09, 2012 15:50 pm 
Junior

Joined: Mon May 07, 2007 13:23 pm
Posts: 42
Location: Halesowen,West Midlands
would a 5/8 master cylinder work?

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 Post subject:
PostPosted: Fri Mar 09, 2012 16:04 pm 
Hurricane

Joined: Sun Feb 20, 2005 17:29 pm
Posts: 293
Location: Pimperne, Blandford, Dorset.
5/8ths is around 16mm so it's the smallest I'd use.
5/8ths is what was used on a lot of twin disc bikes so a clutch cylinder that size should be OK.


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 Post subject:
PostPosted: Fri Mar 09, 2012 17:16 pm 
Junior

Joined: Mon May 07, 2007 13:23 pm
Posts: 42
Location: Halesowen,West Midlands
I found this on fleabay http://www.ebay.co.uk/itm/280806652684? ... 1423.l2649

just need to buy a lever aswell and i can get rocking :D

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 Post subject:
PostPosted: Fri Mar 09, 2012 17:18 pm 
Junior

Joined: Mon May 07, 2007 13:23 pm
Posts: 42
Location: Halesowen,West Midlands
the only larger bore cylinders i've been able to find are about £250 plus!I just can't afford that kind of money :(

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 Post subject:
PostPosted: Fri Mar 09, 2012 21:26 pm 
Hurricane

Joined: Sun Feb 20, 2005 17:29 pm
Posts: 293
Location: Pimperne, Blandford, Dorset.
That would do.
One thing to bear in mind is a sportsbike mastercylinder has the fluid resevoir fitted at an angle so it's level on the clip-ons.
That means if you use one on normal, level, handlebars the resevoir tilts downwards which can affect how much fluid it can hold and sometimes they don't work right at the wrong angle.
What type of bars are you using?
That's why they changed to remote resevoir master cylinders, so you can just set the resevoir where you need it to be level no matter what angle the cylinder is at.
Just make sure whatever cylinder you buy will work with whatever bars you have.
Some apehanger/custom bars have the grip part set at an angle that allows sportsbike cylinders to work, my mate has a Z1000 CSR and we held my ZZR 1100 master cylinders to the bars and they are near perfect fit cos of how the bars turn down at the ends.
Lets make sure whatever you buy will be right so we don't waste your money on parts that won't work as intended/needed.


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 Post subject:
PostPosted: Fri Mar 09, 2012 21:35 pm 
Hurricane

Joined: Sun Feb 20, 2005 17:29 pm
Posts: 293
Location: Pimperne, Blandford, Dorset.
http://www.ebay.co.uk/itm/DUCATI-999-S- ... 1e68d77176
That's a 16mm/5/8ths.


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 Post subject:
PostPosted: Fri Mar 09, 2012 21:43 pm 
Hurricane

Joined: Sun Feb 20, 2005 17:29 pm
Posts: 293
Location: Pimperne, Blandford, Dorset.
http://www.ebay.co.uk/itm/BMW-R1100S-CL ... 4ab4f68b8c
Don't know what size this is but it's off a big/heavy bike so may be worth asking the seller


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