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Front brake caliper

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Front brake caliper

Posted by ady_strowger at April 05. 2017

Had a therapeutic weekend stripping, cleaning, lubeing and reassembling the front caliper last weekend as it had a sticky piston and the pads were due a change so now its back to its normal wooden self.  I think I be investing in a master cylinder bore conversion kit from RGM in the very near future although ive been happy with the current setup for many years so can anyone tell me were these disc brakes Norton used an improvement over the drum brake the commando originally had?

All the best.......Ady

Re: Front brake caliper

Posted by john_holmes at April 05. 2017

They were an improvement but were down rated as they were afraid of customers going from a drum to a disc and locking the front wheel by pulling too hard. The sleeving of the master cylinder restores the improvement and gives better feel so you won't lock the brake.

 

At the time the brake got good reviews and considered better than the contemporary Japanese single piston sliding calipers. Its only later in comparison to more modern brakes  that they are seen as being not performing well.

Re: Front brake caliper

Posted by richard_payne at April 05. 2017

John Hudson once mentioned that the Commando was intended to have twin discs but the cost accountants vetoed it.... they'd already specified the master cylinder and no-one thought to change it.

Re: Front brake caliper

Posted by ady_strowger at April 06. 2017

Previously richard_payne wrote:

John Hudson once mentioned that the Commando was intended to have twin discs but the cost accountants vetoed it.... they'd already specified the master cylinder and no-one thought to change it.


So I take it that the standard master cylinder is for twin disc set up then? ok has anyone used a second standard disc and caliper set up? I don't like the look of after market set ups the price of them does nothing to encourage me either and RGM only do the sleeve kits for the standard M/Cyl so has anybody ever converted their own M/cyl and how involved is it, I'm reasonably competent with lathe and drill press.

Re: Front brake caliper

Posted by david_evans at April 06. 2017

The front wheel will only accommodate a single disc, a twin disc setup would involve a completely different front wheel.

The RGM master cylinder conversion involves borrowing or buying a tap (18mm I think) and the sleeve screws into place once the original MC has been tapped.  If you contact a guy on the accessnorton forum who goes by the name "madass" he sells a sleeve kit that requires no threading of the MC. His other Norton bits get very good reports too including a better front brake setup.

Re: Front brake caliper

Posted by david_evans at April 06. 2017

He lives in the Philippines Google "Madass 140" tritonmotorcycleparts.com  the sleeve kit is $100 US includes a braided pipe

Re: Front brake caliper

Posted by gino_rondelli at April 06. 2017

Or you buy a new Master cylinder setup from Andover which has the smaller bore, haven't fitted mine yet but it looks nice

 

(I also have 2 RGM conversions which work well)

 

Re: Front brake caliper

Posted by david_evans at April 06. 2017

Or dare I say it a 13mm Honda one from a CBR600. Span adjustable, worth fitting the LH switch gear at the same time.

Re: Front brake caliper

Posted by boo_cock at April 06. 2017

Take a look at the RGM website. They show all that is needed to perform the bore process. Ideally, you would use a milling machine with a LARGE or purpose made angle plate to hold it all in place.

Works brilliant with a good set of pads. A not as ugly as the Jap master cylinders,

Re: Front brake caliper

Posted by keith_owen at April 07. 2017

Hi boo,

What would you call a good set of pads?

Keith

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